Toyota Avalon (XX50): Front Power Seat Control System(for Hv Model With Memory)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Seat / Front Power Seat Control System(for Hv Model With Memory)

Slide Sensor Malfunction (B2650)

DESCRIPTION

When the position control ECU assembly does not receive a slide motor position sensor signal despite the seat having been moved forward or backward by power seat motor operation, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2650	Slide Sensor Malfunction	Slide motor position sensor signal not received when power seat moved forward or backward	Position control ECU assembly Slide motor (separate type front seat cushion spring assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2650 is not output.

USE SIMULATION METHOD TO CHECK

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SEAT SLIDE OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Seat Slide Operation	Seat slide operation	OFF/Rear/Front	-

Body Electrical > Driver Seat > Active Test

Tester Display
Seat Slide Operation

OK:

Slide motor operates normally.

GO TO STEP 7

4.	CHECK POSITION CONTROL ECU ASSEMBLY (SLIDE MOTOR CIRCUIT)

(a) Disconnect the R23 slide motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R23-5 (SSRS) - R23-6 (SENG)	Slide switch on	4.8 to 5.1 V

GO TO STEP 6

5.	CHECK SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Reconnect the R23 slide motor (separate type front seat cushion spring assembly LH) connector.

*a	Component with harness connected (Separate Type Front Seat Cushion Spring Assembly LH)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R23-5 (SSRS) - Body ground	Slide motor operating	4.5 to 4.8 V

REPLACE POSITION CONTROL ECU ASSEMBLY

REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-26 (SSRS) - R23-5 (SSRS)	Always	Below 1 Ω
R32-26 (SSRS) or R23-5 (SSRS) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R23-6 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R23-6 (SENG) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the slide motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the slide motor (separate type front seat cushion spring assembly LH).

Click here

REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

8.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R33 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R33-1 (SLD+) - R23-4 (SLD+)	Always	Below 1 Ω
R33-1 (SLD+) or R23-4 (SLD+) - Body ground	Always	10 kΩ or higher
R33-5 (SLD-) - R23-3 (SLD-)	Always	Below 1 Ω
R33-5 (SLD-) or R23-3 (SLD-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Reclining Sensor Malfunction (B2651)

DESCRIPTION

When the position control ECU assembly does not receive a reclining motor position sensor signal despite the seat having been moved forward or rearward by power seat motor operation, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2651	Reclining Sensor Malfunction	Reclining motor position sensor signal not received when power seat moved forward or rearward	Position control ECU assembly Reclining motor (front seatback frame sub-assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2651 is not output.

USE SIMULATION METHOD TO CHECK

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SEAT RECLINING OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Seat Reclining	Seat reclining operation	OFF/Rear/Front	-

Body Electrical > Driver Seat > Active Test

Tester Display
Seat Reclining

OK:

Reclining motor operates normally.

GO TO STEP 7

4.	CHECK POSITION CONTROL ECU ASSEMBLY (RECLINING MOTOR CIRCUIT)

(a) Disconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
a10-4 (SSRR) - a10-2 (SENG)	Reclining switch on	4.8 to 5.1 V

GO TO STEP 6

5.	CHECK RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

(a) Reconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector.

*a	Component with harness connected (Reclining Motor (Front Seatback Frame Sub-assembly LH))

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
a10-4 (SSRR) - Body ground	Reclining motor operating	4.5 to 4.8 V

REPLACE POSITION CONTROL ECU ASSEMBLY

REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-11 (SSRR) - a10-4 (SSRR)	Always	Below 1 Ω
R32-11 (SSRR) or a10-4 (SSRR) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - a10-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or a10-2 (SENG) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

(a) Remove the reclining motor (front seatback frame sub-assembly LH).

Click here

(b) Inspect the reclining motor (front seatback frame sub-assembly LH).

Click here

REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

8.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH))

(a) Disconnect the R33 and R30 position control ECU assembly connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R33-10 (RCL+) - a10-3 (RCL+)	Always	Below 1 Ω
R33-10 (RCL+) or a10-3 (RCL+) - Body ground	Always	10 kΩ or higher
R30-6 (RCL-) - a10-1 (RCL-)	Always	Below 1 Ω
R30-6 (RCL-) or a10-1 (RCL-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Front Vertical Sensor Malfunction (B2652)

DESCRIPTION

When the position control ECU assembly does not receive a front vertical motor position sensor signal despite the seat having been moved upward or downward by power seat motor operation, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2652	Front Vertical Sensor Malfunction	Front vertical motor position sensor signal not received when power seat moved upward or downward	Position control ECU assembly Front vertical motor (separate type front seat cushion spring assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2652 is not output.

USE SIMULATION METHOD TO CHECK

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SEAT FRONT VERTICAL OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Front Vertical Operation	Seat front vertical operation	OFF/Down/Up	-

Body Electrical > Driver Seat > Active Test

Tester Display
Front Vertical Operation

OK:

Front vertical motor operates normally.

GO TO STEP 7

4.	CHECK POSITION CONTROL ECU ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)

(a) Disconnect the R27 front vertical motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R27-4 (SSFV) - R27-2 (SENG)	Front vertical switch on	4.8 to 5.1 V

GO TO STEP 6

5.	CHECK FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Reconnect the R27 front vertical motor (separate type front seat cushion spring assembly LH) connector.

*a	Component with harness connected (Front Vertical Motor (Separate Type Front Seat Cushion Spring Assembly LH))

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R27-4 (SSFV) - Body ground	Front vertical motor operating	4.5 to 4.8 V

REPLACE POSITION CONTROL ECU ASSEMBLY

REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-10 (SSFV) - R27-4 (SSFV)	Always	Below 1 Ω
R32-10 (SSFV) or R27-4 (SSFV) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R27-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R27-2 (SENG) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the front vertical motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the front vertical motor (separate type front seat cushion spring assembly LH).

Click here

REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

8.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R33 and R30 position control ECU assembly connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R33-7 (FRV+) - R27-3 (FRV+)	Always	Below 1 Ω
R33-7 (FRV+) or R27-3 (FRV+) - Body ground	Always	10 kΩ or higher
R30-4 (FRV-) - R27-1 (FRV-)	Always	Below 1 Ω
R30-4 (FRV-) or R27-1 (FRV-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Lifter Sensor Malfunction (B2653)

DESCRIPTION

When the position control ECU assembly does not receive a lifter motor position sensor signal despite the seat having been moved upward or downward by power seat motor operation, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2653	Lifter Sensor Malfunction	Lifter motor position sensor signal not received when power seat moved upward or downward	Position control ECU assembly Lifter motor (separate type front seat cushion spring assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2653 is not output.

USE SIMULATION METHOD TO CHECK

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SEAT LIFTER OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Lifter Operation	Seat lifter operation	OFF/Down/Up	-

Body Electrical > Driver Seat > Active Test

Tester Display
Lifter Operation

OK:

Lifter motor operates normally.

GO TO STEP 7

4.	CHECK POSITION CONTROL ECU ASSEMBLY (LIFTER MOTOR CIRCUIT)

(a) Disconnect the R29 lifter motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R29-4 (SSRL) - R29-2 (SENG)	Lifter switch on	4.8 to 5.1 V

GO TO STEP 6

5.	CHECK LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Reconnect the R29 lifter motor (separate type front seat cushion spring assembly LH) connector.

*a	Component with harness connected (Lifter Motor (Separate Type Front Seat Cushion Spring Assembly LH))

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R29-4 (SSRL) - Body ground	Lifter motor operating	4.5 to 4.8 V

REPLACE POSITION CONTROL ECU ASSEMBLY

REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-25 (SSRL) - R29-4 (SSRL)	Always	Below 1 Ω
R32-25 (SSRL) or R29-4 (SSRL) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R29-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R29-2 (SENG) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the lifter motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the lifter motor (separate type front seat cushion spring assembly LH).

Click here

REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

8.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R33 and R30 position control ECU assembly connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R33-6 (LFT+) - R29-3 (LFT+)	Always	Below 1 Ω
R33-6 (LFT+) or R29-3 (LFT+) - Body ground	Always	10 kΩ or higher
R30-5 (LFT-) - R29-1 (LFT-)	Always	Below 1 Ω
R30-5 (LFT-) or R29-1 (LFT-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Short in Sensor with Motor Power Supply Circuit (B2658)

DESCRIPTION

This DTC is stored when a power seat motor operates (a position control sensor is being supplied with power) and the power supply voltage does not rise to the specified value.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2658	Short in Sensor with Motor Power Supply Circuit	Problem with the voltage supplied to the position control sensor.	Position control ECU assembly Slide motor (separate type front seat cushion spring assembly LH) Front vertical motor (separate type front seat cushion spring assembly LH) Lifter motor (separate type front seat cushion spring assembly LH) Reclining motor (front seatback frame sub-assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2658 is not output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Disconnect the R23 slide motor (separate type front seat cushion spring assembly LH) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-26 (SSRS) - R23-5 (SSRS)	Always	Below 1 Ω
R32-26 (SSRS) or R23-5 (SSRS) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R23-6 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R23-6 (SENG) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK POSITION CONTROL ECU ASSEMBLY (SLIDE MOTOR CIRCUIT)

(a) Reconnect the R23 slide motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R23-5 (SSRS) - R23-6 (SENG)	Slide switch on	4.8 to 5.1 V

REPLACE POSITION CONTROL ECU ASSEMBLY

5.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Disconnect the R27 front vertical motor (separate type front seat cushion spring assembly LH) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-10 (SSFV) - R27-4 (SSFV)	Always	Below 1 Ω
R32-10 (SSFV) or R27-4 (SSFV) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R27-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R27-2 (SENG) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK POSITION CONTROL ECU ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)

(a) Reconnect the R27 front vertical motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R27-4 (SSFV) - R27-2 (SENG)	Front vertical switch on	4.8 to 5.1 V

REPLACE POSITION CONTROL ECU ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Disconnect the R29 lifter motor (separate type front seat cushion spring assembly LH) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-25 (SSRL) - R29-4 (SSRL)	Always	Below 1 Ω
R32-25 (SSRL) or R29-4 (SSRL) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - R29-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or R29-2 (SENG) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	CHECK POSITION CONTROL ECU ASSEMBLY (LIFTER MOTOR CIRCUIT)

(a) Reconnect the R29 lifter motor (separate type front seat cushion spring assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R29-4 (SSRL) - R29-2 (SENG)	Lifter switch on	4.8 to 5.1 V

REPLACE POSITION CONTROL ECU ASSEMBLY

9.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH))

(a) Disconnect the R32 position control ECU assembly connector.

(b) Disconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-11 (SSRR) - a10-4 (SSRR)	Always	Below 1 Ω
R32-11 (SSRR) or a10-4 (SSRR) - Body ground	Always	10 kΩ or higher
R32-12 (SENG) - a10-2 (SENG)	Always	Below 1 Ω
R32-12 (SENG) or a10-2 (SENG) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	CHECK POSITION CONTROL ECU ASSEMBLY (RECLINING MOTOR CIRCUIT)

(a) Reconnect the a10 reclining motor (front seatback frame sub-assembly LH) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
a10-4 (SSRR) - a10-2 (SENG)	Reclining switch on	4.8 to 5.1 V

REPLACE POSITION CONTROL ECU ASSEMBLY

11.	REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Replace the front vertical motor (separate type front seat cushion spring assembly LH) with a new or known good one.

Click here

12.	CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2685 is not output.

END (FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH) WAS DEFECTIVE)

13.	REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Replace the lifter motor (separate type front seat cushion spring assembly LH) with a new or known good one.

Click here

14.	CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2685 is not output.

END (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH) WAS DEFECTIVE)

15.	REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Replace the slide motor (separate type front seat cushion spring assembly LH) with a new or known good one.

Click here

16.	CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2685 is not output.

END (SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH) WAS DEFECTIVE)

17.	REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

(a) Replace the reclining motor (front seatback frame sub-assembly LH) with a new or known good one.

Click here

18.	CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2685 is not output.

END (RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) WAS DEFECTIVE)

REPLACE POSITION CONTROL ECU ASSEMBLY

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)

NOTICE:

When the customer requests a change in a function, first make sure that the function can be customized.
Record the current settings before customizing.

HINT:

The following items can be customized.

(a) Customizing with the Techstream

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Customize Setting / Smart Key / Access or Seat.

(5) Select the setting by referring to the table below.

Smart Key / Access

Tester Display	Description	Default	Setting	ECU
Seat position/Tilt & Telesco memory recall setting	This customize function switches the condition of the seat position and Tilt & Telesco memory recall. Possible recall activation parameter "D-door unlock and open by smart system" or "Any door unlock and open with smart system".	D Door	0:D Door,1:Any Door	Main body ECU (Multiplex network body ECU)

Seat

Tester Display	Description	Default	Setting	ECU
D Seat Operation Interference Avoidance Function	Function to reverse operation when jam detection is detected during slide direction driver seat	ON	0:ON,1:OFF	Position control ECU assembly
Seat Move Distance	Allows customizing of the seat movement distance for the power easy access system.	Standard	00:OFF,01:Little,10:Standard	Main body ECU (Multiplex network body ECU)

(b) Customizing with the multi-display

(1) Turn the power switch on (IG).

(2) Enter the following menus: MENU / Setup / Vehicle / Vehicle Customization / Other Vehicle Settings.

(3) Select the setting by referring to the table below.

Display	Description	Default	Setting	Relevant ECU
Driver's seat Easy-Exit Slide	Allows customizing of the seat movement distance for the power seat power easy access system.	Full	Off / Partial / Full	Main body ECU (Multiplex network body ECU)

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Mirror L / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Mirror L > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Seat Memory Switch1	M1 switch	ON or OFF	ON: M1 switch on OFF: M1 switch off	-
Seat Memory Switch2	M2 switch	ON or OFF	ON: M2 switch on OFF: M2 switch off	-
Seat Memory Switch3	M3 switch*	ON or OFF	ON: M3 switch on OFF: M3 switch off	Not applicable
Seat Memory Set SW	SET switch	ON or OFF	ON: SET switch on OFF: SET switch off	-
+B Voltage Input Value	Power supply for outer mirror control ECU assembly	MIN: 0, MAX: 25.5	Within range from 11 to 14 V	-

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

(f) Enter the following menus: Body Electrical / Driver Seat / Data List.

(g) Read the Data List according to the display on the Techstream.

Body Electrical > Driver Seat > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Reclining Rear	Reclining switch signal (Rearward)	ON or OFF	ON: Reclining switch (Rearward) on OFF: Reclining switch (Rearward) off	-
Reclining Front	Reclining switch signal (Forward)	ON or OFF	ON: Reclining switch (Forward) on OFF: Reclining switch (Forward) off	-
Front Vertical Down	Front vertical switch signal (Downward)	ON or OFF	ON: Front vertical switch (Downward) on OFF: Front vertical switch (Downward) off	-
Front Vertical Up	Front vertical switch signal (Upward)	ON or OFF	ON: Front vertical switch (Upward) on OFF: Front vertical switch (Upward) off	-
Lifter Switch Down	Lifter switch signal (Downward)	ON or OFF	ON: Lifter switch (Downward) on OFF: Lifter switch (Downward) off	-
Lifter Switch Up	Lifter switch signal (Upward)	ON or OFF	ON: Lifter switch (Upward) on OFF: Lifter switch (Upward) off	-
Slide Rear	Slide switch signal (Rearward)	ON or OFF	ON: Slide switch (Rearward) on OFF: Slide switch (Rearward) off	-
Slide Front	Slide switch signal (Forward)	ON or OFF	ON: Slide switch (Forward) on OFF: Slide switch (Forward) off	-
Seat Memory No1	Seat position memorized with M1 switch	Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	-
Seat Memory No2	Seat position memorized with M2 switch	Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	-
Seat Memory No3	Seat position memorized with M3 switch*	Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	Not applicable
Ignition Switch	Communication state of power switch signal	ON or OFF	ON: Power switch on (IG) OFF: Power switch off or on (ACC)	-
Parking Brake SW	Parking brake switch status	ON or OFF	ON: Parking brake applied OFF: Parking brake released	-
Vehicle Speed	Vehicle speed data	Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Actual vehicle speed	-
Slide Position	Seat sliding position	Min: 0, Max: 65535	Within range from 0 to 65535	-
Reclining Position	Seat reclining position	Min: 0, Max: 65535	Within range from 0 to 65535	-
Front Vertical Position	Seat front vertical position	Min: 0, Max: 65535	Within range from 0 to 65535	-
Lifter Position	Seat lifter position	Min: 0, Max: 65535	Within range from 0 to 65535	-
Slide Pos Mem No1	Seat slide position memorized with M1 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Reclining Pos Mem No1	Seat reclining position memorized with M1 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Frnt Vrtcl Pos Mem No1	Front vertical position memorized with M1 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Lifter Pos Mem No1	Lifter position memorized with M1 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Slide Pos Mem No2	Seat slide position memorized with M2 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Reclining Pos Mem No2	Seat reclining position memorized with M2 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Frnt Vrtcl Pos Mem No2	Front vertical position memorized with M2 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Lifter Pos Mem No2	Lifter position memorized with M2 switch	Min: 0, Max: 65535	Within range from 0 to 65535	-
Slide Pos Mem No3	Seat slide position memorized with M3 switch*	Min: 0, Max: 65535	Within range from 0 to 65535	Not applicable
Reclining Pos Mem No3	Seat reclining position memorized with M3 switch*	Min: 0, Max: 65535	Within range from 0 to 65535	Not applicable
Frnt Vrtcl Pos Mem No3	Front vertical position memorized with M3 switch*	Min: 0, Max: 65535	Within range from 0 to 65535	Not applicable
Lifter Pos Mem No3	Lifter position memorized with M3 switch*	Min: 0, Max: 65535	Within range from 0 to 65535	Not applicable
Lumbar Switch UP	Lumbar support adjuster switch signal (Upward)	ON or OFF	ON: Lumbar support adjuster switch (Upward) on OFF: Lumbar support adjuster switch (Upward) off	-
Lumbar Switch Down	Lumbar support adjuster switch signal (Downward)	ON or OFF	ON: Lumbar support adjuster switch (Downward) on OFF: Lumbar support adjuster switch (Downward) off	-
Lumbar Switch Front	Lumbar support adjuster switch signal (Forward)	ON or OFF	ON: Lumbar support adjuster switch (Forward) on OFF: Lumbar support adjuster switch (Forward) off	-
Lumbar Switch Rear	Lumbar support adjuster switch signal (Rearward)	ON or OFF	ON: Lumbar support adjuster switch (Rearward) on OFF: Lumbar support adjuster switch (Rearward) off	-
Lifter Initialize Flag	Seat lifter limit position memory	ON or OFF	ON: Memorized OFF: Not memorized	-
Front Vertical Init Flag	Seat front vertical limit position memory	ON or OFF	ON: Memorized OFF: Not memorized	-
Reclining Position Init Flg	Seat reclining limit position memory	ON or OFF	ON: Memorized OFF: Not memorized	-
Slide Position Init Flag	Seat slide limit position memory	ON or OFF	ON: Memorized OFF: Not memorized	-
Slide Position Front Limit	Seat slide limit position (front)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Slide Position Rear Limit	Seat slide limit position (rear)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Reclining Position Front Limit	Seat reclining limit position (front)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Reclining Position Rear Limit	Seat reclining limit position (rear)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Front Vertical UP Limit	Seat front vertical limit position (up)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Front Vertical Down Limit	Seat front vertical limit position (down)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Lifter Position UP Limit	Seat lifter limit position (up)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Lifter Position Down Limit	Seat lifter limit position (down)	Min: 0, Max: 65535	Within range from 0 to 65535	-
Memory Button Buzzer Request	Driver seat buzzer request display	OFF, MOVE, REGISTRY, CANCEL, REG NG, REG WAIT	OFF: Buzzer does not sound MOVE: Request to sound buzzer when starting memory replay REGISTRY: Request to sound buzzer when starting memory registration CANCEL: Request to sound buzzer when canceling memory call registration REG NG: Request to sound buzzer when memory call registration not possible REG WAIT: Request to sound buzzer when starting memory call cabin scan	-
Driver Seat Request Command	Driver seat operation request received	OFF, MEMORY, MEM MOV, MEM SOD, RET MOV, AWY MOV, AWY SOD, MEM AWY or MEM RET	OFF: No instruction MEMORY: Request to memorize MEM MOV: Request to recall memory MEM SOD: Request to replay RET MOV: Request to return AWY MOV: Request to move away AWY SOD: Request to recall away position memory MEM AWY: Request to recall memorized position of seatback MEM RET: Request to restore seatback to memorized position	-
Driver Seat POS REQ	Seat memory switch operation value	OFF, MEM1, MEM2, MEM3, DRV1, DRV2* or DRV3*	OFF: No operation MEM1: M1 switch operation status MEM2: M2 switch operation status MEM3: M3 switch operation status* DRV1: Other 1 operation status* DRV2: Other 2 operation status* DRV3: Other 3 operation status*	-
Away Move Range Scale	Seat travel distance for power easy access system	NONE, SMALL, STANDRD or LONG	NONE: Seat travel distance none SMALL: Seat travel distance short STANDRD: Seat travel distance normal LONG: Seat travel distance long	-
Return Move	Return function	NOT AVL or AVAIL	NOT AVL: Not available AVAIL: Available	-
Return & Away Function	Return & away function	NOT AVL or AVAIL	NOT AVL: Not available AVAIL: Available	-
Driver Seat Buckle SW	Driver seat belt buckle switch	ON or OFF	ON: Driver seat belt fastened OFF: Driver seat belt unfastened	-
Return Position	Return position	Min: 0, Max: 65535	Within range from 0 to 65535	-
Shift SW Position	Park state signal	Shift P or Shift Other	Shift P: Shift lever in P Shift Other: Shift lever in a position other than P	-
ECU Voltage Value	Voltage of position control ECU assembly	0.95 to 20.84V	11 to 14V	-
Battery Voltage Value	Auxiliary battery voltage	0.95 to 20.84V	11 to 14V	-
Number of Trouble Codes	Number of trouble codes	Min.: 0 or Max.: 255	Number of DTCs will be displayed	-

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

(h) Enter the following menus: Body Electrical / Main Body / Data List.

(i) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FL Door Courtesy SW	Front door courtesy light switch assembly (driver door) signal	ON or OFF	ON: Driver door open OFF: Driver door closed	-
Seat position/Tilt & Telesco memory recall setting	Setting of customize function "Seat position/Tilt & Telesco memory recall setting"	D Door or Any Door	Customize setting displayed	-
Mem SW No. w/KeyID1	Memory switch linked with key ID1	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID1 MEM SW1: M1 switch linked with key ID1 MEM SW2: M2 switch linked with key ID1 MEM SW3: M3 switch linked with key ID1*	-
Mem SW No. w/KeyID2	Memory switch linked with key ID2	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID2 MEM SW1: M1 switch linked with key ID2 MEM SW2: M2 switch linked with key ID2 MEM SW3: M3 switch linked with key ID2*	-
Mem SW No. w/KeyID3	Memory switch linked with key ID3	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID3 MEM SW1: M1 switch linked with key ID3 MEM SW2: M2 switch linked with key ID3 MEM SW3: M3 switch linked with key ID3*	-
Mem SW No. w/KeyID4	Memory switch linked with key ID4	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID4 MEM SW1: M1 switch linked with key ID4 MEM SW2: M2 switch linked with key ID4 MEM SW3: M3 switch linked with key ID4*	-
Mem SW No. w/KeyID5	Memory switch linked with key ID5	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID5 MEM SW1: M1 switch linked with key ID5 MEM SW2: M2 switch linked with key ID5 MEM SW3: M3 switch linked with key ID5*	-
Mem SW No. w/KeyID6	Memory switch linked with key ID6	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID6 MEM SW1: M1 switch linked with key ID6 MEM SW2: M2 switch linked with key ID6 MEM SW3: M3 switch linked with key ID6*	-
Mem SW No. w/KeyID7	Memory switch linked with key ID7	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID7 MEM SW1: M1 switch linked with key ID7 MEM SW2: M2 switch linked with key ID7 MEM SW3: M3 switch linked with key ID7*	-
Driver Seat Memory1	Seat position memorized with M1 switch	ON or OFF	ON: Memorized OFF: Not memorized	-
Driver Seat Memory2	Seat position memorized with M2 switch	ON or OFF	ON: Memorized OFF: Not memorized	-
D Seat Configuration	Position control ECU assembly status	NONE, Not RTN or Return	NONE: Position control ECU assembly not connected Not RTN: Position control ECU assembly connected (Not including power seat power easy access system function) Return: Position control ECU assembly connected (Including power seat power easy access system function)	-
Communication P-Seat	Connection status between position control ECU assembly and main body ECU (multiplex network body ECU)*	STOP or OK	STOP: Communication stopped OK: Normal communication	Not applicable
Communication D-Seat	Connection status between position control ECU assembly and main body ECU (multiplex network body ECU)*	STOP or OK	STOP: Communication stopped OK: Normal communication	Not applicable

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

(j) Enter the following menus: Body Electrical / Master Switch / Data List.

(k) Read the Data List according to the display on the Techstream.

Body Electrical > Master Switch > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Lock Switch Status

Door control switch (multiplex network master switch assembly) lock signal

ON or OFF

ON: Lock side of door control switch (multiplex network master switch assembly) pushed

OFF: Lock side of door control switch (multiplex network master switch assembly) not pushed

Door Unlock Switch Status

Door control switch (multiplex network master switch assembly) unlock signal

ON or OFF

ON: Unlock side of door control switch (multiplex network master switch assembly) pushed

OFF: Unlock side of door control switch (multiplex network master switch assembly) not pushed

(l) Enter the following menus: Powertrain / Hybrid Control / Data List.

(m) Read the Data List according to the display on the Techstream.

Powertrain > Hybrid Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift Position

Current shift state

P / R / N / D / B

Matches currently selected shift state:

P, R, N, D

Shift state

ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Seat Reclining	Seat reclining operation	OFF/Rear/Front	-
Front Vertical Operation	Seat front vertical operation	OFF/Down/Up	-
Lifter Operation	Seat lifter operation	OFF/Down/Up	-
Seat Slide Operation	Seat slide operation	OFF/Rear/Front	-
Buzzer	Buzzer operation	OFF/ON	-
Lumbar Lift	Lumbar support operation (Upward - Downward)	OFF/UP/DOWN	-
Lumbar Slide	Lumbar support operation (Forward - Rearward)	OFF/Rear/Front	-

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) Front power seat control system (w/ Memory) data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Check the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery.

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Front Power Seat Control System (w/ Memory)

DTC No.	Detection Item	Link
B2650	Slide Sensor Malfunction
B2651	Reclining Sensor Malfunction
B2652	Front Vertical Sensor Malfunction
B2653	Lifter Sensor Malfunction
B2658	Short in Sensor with Motor Power Supply Circuit

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Trouble Codes.

Body Electrical > Driver Seat > Trouble Codes

(e) Check for DTCs.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Trouble Codes.

Body Electrical > Driver Seat > Clear DTCs

(e) Clear the DTCs.

Front Power Seat does not Operate with Front Power Seat Switch

DESCRIPTION

Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the power seat switch and operates each motor. If the position control ECU assembly receives more than 2 motor operation signals for the same motor, the motor will be stopped. Manual operation resumes when the position control ECU assembly receives only 1 signal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

(a) Check that each function of the power seat operates normally by using the front power seat switch LH.

Click here

Result	Proceed to
All power seat functions do not operate	A
One or more power seat functions do not operate	B

GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate)

2.	INSPECT FRONT POWER SEAT SWITCH LH

(a) Remove the front power seat switch LH.

Click here

(b) Inspect the front power seat switch LH.

Click here

REPLACE FRONT POWER SEAT SWITCH LH

3.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SUPPLY)

(a) Disconnect the R33 and R32 position control ECU assembly connectors.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R33-3 (B) - Body ground	Power switch off	11 to 14 V
R32-15 (SYSB) - Body ground	Power switch off	11 to 14 V
R32-1 (IG) - Body ground	Power switch on (IG)	11 to 14 V
R32-1 (IG) - Body ground	Power switch off	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R33-2 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R31-20 (E) - Body ground	Always	Below 1 Ω

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the front power seat control system (w/ Memory).
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer to confirm the problem.

Click here

PRE-CHECK

(a) Measure the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

4.	INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

5.	INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for LIN communication system DTCs.

Click here

Result	Proceed to
LIN DTCs are not output	A
LIN DTCs are output	B

GO TO LIN COMMUNICATION SYSTEM

6.	CHECK FOR DTC*

(a) Clear the DTCs.

Click here

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Click here

Body Electrical > Driver Seat > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

7.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

GO TO STEP 9

8.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here

(b) Data List / Active Test

Click here

(d) Inspection

9.	REPAIR OR REPLACE

10.	CONFIRMATION TEST

END

One or more Power Seat Motors do not Operate

DESCRIPTION

Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the position control ECU assembly and operates each motor. If the position control ECU assembly receives 2 or more operation signals for the same motor, the motor will be stopped. Manual operation resumes when the position control ECU assembly receives only 1 signal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

(a) Check that each function of the power seat operates normally by using the front power seat switch LH.

Click here

Result	Proceed to
One or more power seat functions do not operate	A
All power seat functions do not operate	B

GO TO OTHER DIAGNOSIS PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch)

2.	READ VALUE USING TECHSTREAM (POWER SEAT SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Driver Seat > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Reclining Rear	Reclining switch signal (Rearward)	ON or OFF	ON: Reclining switch (Rearward) on OFF: Reclining switch (Rearward) off	-
Reclining Front	Reclining switch signal (Forward)	ON or OFF	ON: Reclining switch (Forward) on OFF: Reclining switch (Forward) off	-
Front Vertical Down	Front vertical switch signal (Downward)	ON or OFF	ON: Front vertical switch (Downward) on OFF: Front vertical switch (Downward) off	-
Front Vertical Up	Front vertical switch signal (Upward)	ON or OFF	ON: Front vertical switch (Upward) on OFF: Front vertical switch (Upward) off	-
Lifter Switch Down	Lifter switch signal (Downward)	ON or OFF	ON: Lifter switch (Downward) on OFF: Lifter switch (Downward) off	-
Lifter Switch Up	Lifter switch signal (Upward)	ON or OFF	ON: Lifter switch (Upward) on OFF: Lifter switch (Upward) off	-
Slide Rear	Slide switch signal (Rearward)	ON or OFF	ON: Slide switch (Rearward) on OFF: Slide switch (Rearward) off	-
Slide Front	Slide switch signal (Forward)	ON or OFF	ON: Slide switch (Forward) on OFF: Slide switch (Forward) off	-
Lumbar Switch UP	Lumbar support adjuster switch signal (Upward)	ON or OFF	ON: Lumbar support adjuster switch (Upward) on OFF: Lumbar support adjuster switch (Upward) off	-
Lumbar Switch Down	Lumbar support adjuster switch signal (Downward)	ON or OFF	ON: Lumbar support adjuster switch (Downward) on OFF: Lumbar support adjuster switch (Downward) off	-
Lumbar Switch Front	Lumbar support adjuster switch signal (Forward)	ON or OFF	ON: Lumbar support adjuster switch (Forward) on OFF: Lumbar support adjuster switch (Forward) off	-
Lumbar Switch Rear	Lumbar support adjuster switch signal (Rearward)	ON or OFF	ON: Lumbar support adjuster switch (Rearward) on OFF: Lumbar support adjuster switch (Rearward) off	-

Body Electrical > Driver Seat > Data List

Tester Display
Reclining Rear
Reclining Front
Front Vertical Down
Front Vertical Up
Lifter Switch Down
Lifter Switch Up
Slide Rear
Slide Front
Lumbar Switch UP
Lumbar Switch Down
Lumbar Switch Front
Lumbar Switch Rear

OK:

On the Techstream screen, ON or OFF is displayed accordingly

GO TO STEP 10

3.	PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR)

(a) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(b) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Seat Reclining	Seat reclining operation	OFF/Rear/Front	-
Front Vertical Operation	Seat front vertical operation	OFF/Down/Up	-
Lifter Operation	Seat lifter operation	OFF/Down/Up	-
Seat Slide Operation	Seat slide operation	OFF/Rear/Front	-
Lumbar Lift	Lumbar support operation (Upward - Downward)	OFF/Up/Down	-
Lumbar Slide	Lumbar support operation (Forward - Rearward)	OFF/Rear/Front	-

Body Electrical > Driver Seat > Active Test

Tester Display
Seat Reclining

Body Electrical > Driver Seat > Active Test

Tester Display
Front Vertical Operation

Body Electrical > Driver Seat > Active Test

Tester Display
Lifter Operation

Body Electrical > Driver Seat > Active Test

Tester Display
Seat Slide Operation

Body Electrical > Driver Seat > Active Test

Tester Display
Lumbar Slide

Body Electrical > Driver Seat > Active Test

Tester Display
Lumbar Lift

Result	Proceed to
All power seat functions operate normally	A
Slide function does not operate normally	B
Front vertical function does not operate normally	C
Lifter function does not operate normally	D
Reclining function does not operate normally	E
Lumbar support adjustment function does not operate normally	F

REPLACE POSITION CONTROL ECU ASSEMBLY

GO TO STEP 5

GO TO STEP 6

GO TO STEP 7

GO TO STEP 8

4.	INSPECT SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the slide motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the slide motor (separate type front seat cushion spring assembly LH).

Click here

GO TO STEP 9

REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

5.	INSPECT FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the front vertical motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the front vertical motor (separate type front seat cushion spring assembly LH).

Click here

GO TO STEP 9

REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

6.	INSPECT LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

(a) Remove the lifter motor (separate type front seat cushion spring assembly LH).

Click here

(b) Inspect the lifter motor (separate type front seat cushion spring assembly LH).

Click here

GO TO STEP 9

REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH)

7.	INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

(a) Remove the reclining motor (front seatback frame sub-assembly LH).

Click here

(b) Inspect the reclining motor (front seatback frame sub-assembly LH).

Click here

GO TO STEP 9

REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)

8.	INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH

(a) Remove the lumbar support adjuster assembly LH.

Click here

(b) Inspect the lumbar support adjuster assembly LH.

Click here

REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH

9.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SEAT MOTOR)

(a) Disconnect the R33 and R30 position control ECU assembly connectors.

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Check the wire harness and connector between the position control ECU assembly and applicable motor.

Standard Resistance:

Slide Motor

Tester Connection	Condition	Specified Condition
R33-1 (SLD+) - R23-4 (SLD+)	Always	Below 1 Ω
R33-1 (SLD+) or R23-4 (SLD+) - Body ground	Always	10 kΩ or higher
R33-5 (SLD-) - R23-3 (SLD-)	Always	Below 1 Ω
R33-5 (SLD-) or R23-3 (SLD-) - Body ground	Always	10 kΩ or higher

Front Vertical Motor

Tester Connection	Condition	Specified Condition
R33-7 (FRV+) - R27-3 (FRV+)	Always	Below 1 Ω
R33-7 (FRV+) or R27-3 (FRV+) - Body ground	Always	10 kΩ or higher
R30-4 (FRV-) - R27-1 (FRV-)	Always	Below 1 Ω
R30-4 (FRV-) or R27-1 (FRV-) - Body ground	Always	10 kΩ or higher

Lifter Motor

Tester Connection	Condition	Specified Condition
R33-6 (LFT+) - R29-3 (LFT+)	Always	Below 1 Ω
R33-6 (LFT+) or R29-3 (LFT+) - Body ground	Always	10 kΩ or higher
R30-5 (LFT-) - R29-1 (LFT-)	Always	Below 1 Ω
R30-5 (LFT-) or R29-1 (LFT-) - Body ground	Always	10 kΩ or higher

Reclining Motor

Tester Connection	Condition	Specified Condition
R33-10 (RCL+) - a10-3 (RCL+)	Always	Below 1 Ω
R33-10 (RCL+) or a10-3 (RCL+) - Body ground	Always	10 kΩ or higher
R30-6 (RCL-) - a10-1 (RCL-)	Always	Below 1 Ω
R30-6 (RCL-) or a10-1 (RCL-) - Body ground	Always	10 kΩ or higher

Front Lumbar Support Motor

Tester Connection	Condition	Specified Condition
R33-9 (L+) - a8-2 (L+)	Always	Below 1 Ω
R33-9 (L+) or a8-2 (L+) - Body ground	Always	10 kΩ or higher
R30-3 (L-) - a8-1 (L-)	Always	Below 1 Ω
R30-3 (L-) or a8-1 (L-) - Body ground	Always	10 kΩ or higher
R33-8 (LV+) - a9-2 (LV+)	Always	Below 1 Ω
R33-8 (LV+) or a9-2 (LV+) - Body ground	Always	10 kΩ or higher
R30-1 (LV-) - a9-1 (LV-)	Always	Below 1 Ω
R30-1 (LV-) or a9-1 (LV-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	INSPECT FRONT POWER SEAT SWITCH LH

(a) Remove the front power seat switch LH.

Click here

(b) Inspect the front power seat switch LH.

Click here

REPLACE FRONT POWER SEAT SWITCH LH

11.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT POWER SEAT SWITCH LH)

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Ground

Tester Connection	Condition	Specified Condition
R31-20 (E) - R33-2 (E)	Always	Below 1 Ω
R31-20 (E) or R33-2 (E) - Body ground	Always	Below 1 Ω

Slide Function

Tester Connection	Condition	Specified Condition
R31-6 (SLDR) - R32-23 (SLDR)	Always	Below 1 Ω
R31-6 (SLDR) or R32-23 (SLDR) - Body ground	Always	10 kΩ or higher
R31-7 (SLDF) - R32-9 (SLDF)	Always	Below 1 Ω
R31-7 (SLDF) or R32-9 (SLDF) - Body ground	Always	10 kΩ or higher

Reclining Function

Tester Connection	Condition	Specified Condition
R31-1 (RCLR) - R32-22 (RCLR)	Always	Below 1 Ω
R31-1 (RCLR) or R32-22 (RCLR) - Body ground	Always	10 kΩ or higher
R31-2 (RCLF) - R32-8 (RCLF)	Always	Below 1 Ω
R31-2 (RCLF) or R32-8 (RCLF) - Body ground	Always	10 kΩ or higher

Front Vertical Function

Tester Connection	Condition	Specified Condition
R31-4 (FRVU) - R32-6 (FRVU)	Always	Below 1 Ω
R31-4 (FRVU) or R32-6 (FRVU) - Body ground	Always	10 kΩ or higher
R31-5 (FRVD) - R32-20 (FRVD)	Always	Below 1 Ω
R31-5 (FRVD) or R32-20 (FRVD) - Body ground	Always	10 kΩ or higher

Lifter Function

Tester Connection	Condition	Specified Condition
R31-3 (LFTU) - R32-7 (LFTU)	Always	Below 1 Ω
R31-3 (LFTU) or R32-7 (LFTU) - Body ground	Always	10 kΩ or higher
R31-8 (LFTD) - R32-21 (LFTD)	Always	Below 1 Ω
R31-8 (LFTD) or R32-21 (LFTD) - Body ground	Always	10 kΩ or higher

Lumbar Support Adjustment Function

Tester Connection	Condition	Specified Condition
R31-17 (R) - R32-18 (LFLR)	Always	Below 1 Ω
R31-17 (R) or R32-18 (LFLR) - Body ground	Always	10 kΩ or higher
R31-14 (H) - R32-4 (LFLF)	Always	Below 1 Ω
R31-14 (H) or R32-4 (LFLF) - Body ground	Always	10 kΩ or higher
R31-11 (LRU+) - R32-3 (LVU)	Always	Below 1 Ω
R31-11 (LRU+) or R32-3 (LVU) - Body ground	Always	10 kΩ or higher
R31-9 (LRD+) - R32-17 (LVD)	Always	Below 1 Ω
R31-9 (LRD+) or R32-17 (LVD) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Operation Check

OPERATION CHECK

CHECK CUSTOMIZE PARAMETERS

NOTICE:

Confirm that the customize setting Auto Operation Interference Avoidance Function is set to off before checking the operation of the front power seat.

Click here

CHECK POWER SEAT FUNCTION

(a) Check the basic functions.

*a	Slide Function
*b	Reclining Function
*c	Lifter Function
*d	Front Vertical Function
*e	Lumbar Support Adjustment Function (forward - back)
*f	Lumbar Support Adjustment Function (up - down)

(1) Operate the power seat switches and check that the following seat functions operate properly:

Slide function
Reclining function
Lifter function
Front vertical function
Lumbar support adjustment function

CHECK POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER AND RECLINING FUNCTIONS)

(a) Check the PTC operation inside the power seat motor.

NOTICE:

The inspection should be performed with the seat installed to the vehicle.
Perform the 4 steps below to check the full range of motion for each power seat function.

HINT:

The resistance of the PTC thermistor increases when a switch of the front power seat switch LH is held down even after the seat has been moved to the farthest possible position in one direction. If the resistance increases beyond a specified level, the current is shut off to prevent a short circuit.

(1) Choose a power seat function. Operate a switch of the front power seat switch LH and move the seat to the farthest possible position in one direction. Keep the seat in that position for approximately 60 seconds.

(2) Operate the switch of the front power seat switch LH again and continue to try to move the seat in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound stops).

Standard:

4 to 90 seconds

(3) After the current is shut off, release the switch of the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate a switch of the front power seat switch LH and move the seat in the opposite direction. Check that the motor operates.

CHECK FRONT LUMBAR SUPPORT MOTOR

(a) Check the PTC operation inside the front lumbar support motor (forward - back).

NOTICE:

The inspection should be performed with the seat installed to the vehicle.

(1) Operate the front power seat switch LH and move the lumbar support to either the foremost or rearmost position. Keep the seat in that position for approximately 60 seconds.

(2) Operate the front power seat switch LH again and continue to try to move the lumbar support in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound will stop).

Standard:

4 to 90 seconds

(3) After the current is shut off, release the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate the front power seat switch LH and move the lumbar support in the opposite direction. Check that the motor operates.

(b) Check the PTC operation inside the front lumbar support motor (up - down).

NOTICE:

The inspection should be performed with the seat installed to the vehicle.

(1) Operate the front power seat switch LH and move the lumbar support to either the uppermost or lowermost position. Keep the seat in that position for approximately 60 seconds.

Standard:

4 to 90 seconds

(3) After the current is shut off, release the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate the front power seat switch LH and move the lumbar support in the opposite direction. Check that the motor operates.

CHECK POWER SEAT POWER EASY ACCESS SYSTEM

HINT:

When troubleshooting a function, first make sure that the function is set to the default setting.
Click here
The power seat power easy access system may not operate and move the seat rearward if the seat is near the rearmost position.

(a) Move the driver seat to the foremost position using the front power seat switch LH.

(b) Perform either of the following and check that the driver seat moves rearward:

With the power switch off and the shift lever in P, unfasten the driver seat seat belt.
With the shift lever in P and the driver seat seat belt unfastened, turn the power switch off.

With the shift lever in P, fasten the driver seat seat belt.
With the shift lever in P, turn the power switch from off to on (IG).

CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

HINT:

The SET, M1 and M2 seat memory switches are shown in the illustration.
The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.

(a) Turn the power switch on (IG) and check that the P position indicator is illuminated.

*a	SET Switch
*b	M1 Switch
*c	M2 Switch

(b) Move the seat to the foremost and uppermost positions using the front power seat switch LH.

(c) Check that a buzzer sounds for 0.5 seconds and the seat position is memorized when the M1 switch is pressed within 3 seconds of the SET switch being pressed or the M1 switch is pressed while the SET switch is being pressed.

(d) Move the seat out of the foremost and uppermost positions using the front power seat switch LH.

(e) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M2 switch is pressed within 3 seconds of the SET switch being pressed or the M2 switch is pressed while the SET switch is being pressed.

(f) Move the seat to the rearmost and lowermost positions using the front power seat switch LH.

(g) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the foremost and uppermost positions (memorized positions) when the M1 switch is pressed.

(h) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves out of the foremost and uppermost positions (memorized positions) when the M2 switch is pressed.

(i) Turn the power switch off and open the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1 or M2 switch within 180 seconds after the power switch is turned off.

(j) Turn the power switch off and close the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1 or M2 switch within 60 seconds after the power switch is turned off.

CHECK MEMORY CALL FUNCTION

(a) Automatic memory call function

HINT:

When the customize function "Seat Move Distance" is set to "Standard", the seat slides backward to a position 50 mm (1.97 in) from the memorized position.

Click here

(1) Prepare 2 electrical key transmitter sub-assemblies and label them electrical key transmitter sub-assembly A and electrical key transmitter sub-assembly B.

NOTICE:

Prepare 2 electrical key transmitter sub-assemblies which have already been registered to the vehicle and can be used to lock and unlock the doors normally.

HINT:

Refer to Registration for the electrical key transmitter sub-assembly registration procedure.
Click here
Use tags to identify each electrical key transmitter sub-assembly.

(2) Register a seat position to the seat memory switch (M1) and the electrical key transmitter sub-assembly A.

HINT:

Refer to Memory Call Registration.

Click here

(3) While carrying the electrical key transmitter sub-assembly A, unlock the driver door using the entry unlock function or wireless unlock operation. Open the driver door and check that a buzzer sounds for 0.1 seconds and the driver seat moves to the memorized position.

(4) Register a seat position to the seat memory switch (M2) and the electrical key transmitter sub-assembly B.

HINT:

Refer to Memory Call Registration.

Click here

(5) While carrying the electrical key transmitter sub-assembly B, unlock the driver door using the entry unlock function or wireless unlock operation. Open the driver door and check that a buzzer sounds for 0.1 seconds and the driver seat moves to the memorized position.

CHECK MEMORY CALL EMERGENCY STOP FUNCTION

(a) While a memory call function is operating, check that performing one of the following will stop the memory call operation: 1) press the SET switch, M1 switch or M2 switch or 2) press the front power seat switch.

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER DOOR)	*2	SEAT MEMORY SWITCH
*3	MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - DOOR CONTROL SWITCH	*4	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*5	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - DOOR F/L FUSE - P/SEAT F/L FUSE - ECU-DCC NO. 2 FUSE - ECU-IG1 NO. 4 FUSE	*6	OUTER MIRROR CONTROL ECU ASSEMBLY LH
*7	CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)	*8	DLC3
*9	HYBRID VEHICLE CONTROL ECU ASSEMBLY	-	-

ILLUSTRATION

*1	SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH	*2	FRONT SEATBACK FRAME SUB-ASSEMBLY LH
*3	LUMBAR SUPPORT ADJUSTER ASSEMBLY LH	*4	FRONT POWER SEAT SWITCH LH
*5	LIFTER MOTOR	*6	FRONT VERTICAL MOTOR
*7	RECLINING MOTOR	*8	SLIDE MOTOR
*9	POSITION CONTROL ECU ASSEMBLY	*10	FRONT SEAT INNER BELT ASSEMBLY LH

Power Seat does not Return to Memorized Position

DESCRIPTION

When the M1 or M2 switch of the seat memory switch is pressed, the outer mirror control ECU assembly sends a switch signal to the main body ECU (multiplex network body ECU) via CAN communication. Then, the main body ECU (multiplex network body ECU) sends a recall request signal to the position control ECU assembly. The position control ECU assembly operates each motor to move the seat to the memorized position.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.
The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

PROCEDURE

1.	CHECK FRONT POWER SEAT CONTROL OPERATION

(a) Check that each function of the power seat operates normally by using the front power seat switch LH.

Click here

OK:

Each function of the power seat operates normally using the front power seat switch LH.

GO TO PROBLEM SYMPTOMS TABLE

2.	CHECK SEAT POSITION MEMORY FUNCTION

(a) Check the seat position memory function.

Click here

OK:

Seat position memory function is normal.

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

3.	CHECK SEAT POSITION RESTORING FUNCTION

(a) Under each of the following conditions, check that the seat position restoring function operates by pressing the M1 or M2 switch.

Click here

The power switch is on (IG), and the shift lever is in P.*1
Within 180 seconds after the driver door is opened with the power switch off.*2
Within 60 seconds after the driver door is opened and then closed with the power switch off.*3

Result	Proceed to
Seat position restoring function does not operate at all.	A
Seat position restoring function does not operate when the condition is *1.	B
Seat position restoring function does not operate when the condition is 2. Seat position restoring function does not operate when the condition is 3.	C

GO TO STEP 7

GO TO STEP 10

4.	READ VALUE USING TECHSTREAM (SEAT POSITION MEMORY)

(a) Store a seat position in memory for the M1 and M2 switches.

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Driver Seat / Data List.

(f) Read the Data List according to the display on the Techstream.

Body Electrical > Driver Seat > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Seat Memory No1

Seat position memorized with M1 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Seat Memory No2

Seat position memorized with M2 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Body Electrical > Driver Seat > Data List

Tester Display
Seat Memory No1
Seat Memory No2

OK:

Mem is displayed on the Techstream screen.

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

5.	REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Replace the outer mirror control ECU assembly LH with a new or known good one.

Click here

6.	CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Check the seat position memory and restoring functions.

Click here

OK:

Seat position memory and restoring functions operate normally.

END (OUTER MIRROR CONTROL ECU ASSEMBLY LH WAS DEFECTIVE)

GO TO STEP 8

7.	READ VALUE USING TECHSTREAM (SHIFT P POSITION STATE)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Hybrid Control / Data List.

(e) Read the Data List according to the display on the Techstream.

Powertrain > Hybrid Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift Position

Current shift state

P / R / N / D / B

Matches currently selected shift state:

P, R, N, D

Shift state

Powertrain > Hybrid Control > Data List

Tester Display
Shift Position

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

GO TO AUTOMATIC TRANSAXLE SYSTEM (P070562)

8.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

9.	CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Check the seat position memory and restoring functions.

Click here

OK:

Seat position memory and restoring functions operate normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

10.	READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FL Door Courtesy SW

Front door courtesy light switch assembly (driver door) signal

ON or OFF

ON: Driver door open

OFF: Driver door closed

Body Electrical > Main Body > Data List

Tester Display
FL Door Courtesy SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

REPLACE POSITION CONTROL ECU ASSEMBLY

GO TO LIGHTING SYSTEM (Front Door Courtesy Switch Circuit)

Power Seat Position is not Memorized

DESCRIPTION

The main body ECU (multiplex network body ECU) receives seat memory switch signals from the outer mirror control ECU assembly LH via CAN communication. If the SET switch is being pressed when one of the M1 or M2 switches is pressed, or if one of the M1 or M2 switches is pressed within 3 seconds of pressing the SET switch, the main body ECU (multiplex network body ECU) sends a memory request signal to the position control ECU assembly. After receiving the request signal, the position control ECU assembly memorizes the location data of each motor.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.
The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

PROCEDURE

1.	CHECK FRONT POWER SEAT CONTROL OPERATION

(a) Check that each function of the power seat operates normally by using the front power seat switch LH.

Click here

OK:

Each function of the power seat operates normally using the front power seat switch LH.

GO TO PROBLEM SYMPTOMS TABLE

2.	READ VALUE USING TECHSTREAM (SEAT MEMORY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Mirror L / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Mirror L > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Seat Memory Switch1

M1 switch

ON or OFF

ON: M1 switch on

OFF: M1 switch off

Seat Memory Switch2

M2 switch

ON or OFF

ON: M2 switch on

OFF: M2 switch off

Seat Memory Set SW

SET switch

ON or OFF

ON: SET switch on

OFF: SET switch off

Body Electrical > Mirror L > Data List

Tester Display
Seat Memory Switch1
Seat Memory Switch2
Seat Memory Set SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

GO TO STEP 8

3.	PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Buzzer	Buzzer operation	OFF/ON	-

Body Electrical > Driver Seat > Active Test

Tester Display
Buzzer

OK:

Buzzer sounds normally.

REPLACE POSITION CONTROL ECU ASSEMBLY

4.	REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Replace the outer mirror control ECU assembly LH with a new or known good one.

Click here

5.	CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Check the seat position memory and restoring functions.

Click here

OK:

Seat position memory and restoring functions operate normally.

END (OUTER MIRROR CONTROL ECU ASSEMBLY LH WAS DEFECTIVE)

6.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

7.	CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Check the seat position memory and restoring functions.

Click here

OK:

Seat position memory and restoring functions operate normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

8.	INSPECT SEAT MEMORY SWITCH

(a) Remove the seat memory switch.

Click here

(b) Inspect the seat memory switch.

Click here

REPLACE SEAT MEMORY SWITCH

9.	CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY LH - SEAT MEMORY SWITCH - BODY GROUND)

(a) Disconnect the I21 outer mirror control ECU assembly LH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I21-1 (MM) - I17-5 (MMRY)	Always	Below 1 Ω
I21-1 (MM) or I17-5 (MMRY) - Body ground	Always	10 kΩ or higher
I21-2 (M1) - I17-4 (1)	Always	Below 1 Ω
I21-2 (M1) or I17-4 (1) - Body ground	Always	10 kΩ or higher
I21-3 (M2) - I17-3 (2)	Always	Below 1 Ω
I21-3 (M2) or I17-3 (2) - Body ground	Always	10 kΩ or higher
I21-7 (GND) - Body ground	Always	Below 1 Ω
I17-1 (E) - Body ground	Always	Below 1 Ω

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Power Seat Power Easy Access System Function does not Operate

DESCRIPTION

Perform either of the following and check that the driver seat moves rearward:
- With the power switch off and the shift lever in P, unfasten the driver seat seat belt.
- With the shift lever in P and the driver seat seat belt unfastened, turn the power switch off.
Perform either of the following and check that the driver seat moves forward:
- With the shift lever in P, fasten the driver seat seat belt.
- With the shift lever in P, turn the power switch from off to on (IG).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The front power seat control system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

HINT:

When troubleshooting a function, first make sure that the function is set to the default setting.

Click here

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

(a) Check that each function of the power seat operates normally by using the front power seat switch LH.

Click here

Result	Proceed to
Power seat functions operate normally	A
All power seat functions do not operate	B
One or more power seat motors do not operate	C

GO TO OTHER FLOW CHART (Front Power Seat does not Operate with Front Power Seat Switch)

GO TO OTHER FLOW CHART (One or more Power Seat Motors do not Operate)

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Driver Seat / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Driver Seat > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Driver Seat Buckle SW

Driver seat belt buckle switch

ON or OFF

ON: Driver seat belt fastened

OFF: Driver seat belt unfastened

Body Electrical > Driver Seat > Data List

Tester Display
Driver Seat Buckle SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

GO TO STEP 5

3.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Temporarily replace the position control ECU assembly with a new or known good one.

Click here

4.	CHECK POWER SEAT POWER EASY ACCESS SYSTEM

(a) Check the power seat power easy access system.

Click here

OK:

Power seat power easy access system is normal.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

5.	INSPECT FRONT SEAT INNER BELT ASSEMBLY LH

(a) Remove the front seat inner belt assembly LH.

Click here

(b) Inspect the front seat inner belt assembly LH.

Click here

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY LH - BODY GROUND)

(a) Disconnect the R32 position control ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-27 (DBCL) - K54-5 (RDC)	Always	Below 1 Ω
R32-27 (DBCL) or K54-5 (RDC) - Body ground	Always	10 kΩ or higher
K54-6 (E) - Body ground	Always	Below 1 Ω

REPLACE POSITION CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected.

System Name	See Procedure
Lane Departure Alert System (w/ Steering Control)
Intelligent Clearance Sonar System
Parking Assist Monitor System
Panoramic View Monitor System
Pre-collision System
Lighting System (for HV Model with Cornering Light)

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Front Power Seat Control System (w/ Memory)

Symptom	Suspected Area	Link
Front power seat does not operate with front power seat switch	Refer to the "Front Power Seat does not Operate with Front Power Seat Switch".
One or more power seat motors do not operate	Refer to the "One or more Power Seat Motors do not Operate".
Power seat position is not memorized	Refer to the "Power Seat Position is not Memorized".
Power seat does not return to memorized position	Refer to the "Power Seat does not Return to Memorized Position".
Wireless transmitter memory function does not operate	Refer to the "Wireless Transmitter Memory Function does not Operate".
Wireless-linked return function does not operate	Refer to the "Wireless-linked Return Function does not Operate".
Power seat power easy access system function does not operate	Refer to the "Power Seat Power Easy Access System Function does not Operate".

Registration

REGISTRATION

PROCEDURE

1. MEMORY CALL REGISTRATION

(a) Memory registration

NOTICE:

Do not bring 2 or more electrical key transmitter sub-assemblies into the cabin.
Do not press and hold the door control switch on the multiplex network master switch assembly for 3 seconds or more.

(1) Register the seat position to a seat memory switch (M1 or M2 switch) in advance.

(2) Sit on the driver seat carrying only the electrical key transmitter sub-assembly to which a seat position is to be registered.

(3) With the power switch on (IG) and the shift lever in P, restore the seat to the memorized position to be registered.

(4) With the power switch on (IG), the shift lever in P, the driver door closed and a seat memory switch (M1 or M2 switch) being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the buzzer answer-back function operates.

HINT:

The door control switch on the multiplex network master switch assembly can be pressed to either the lock or unlock side.
The buzzer will sound for 0.5 seconds when the registration is complete.
The buzzer will sound for 3 seconds if the registration fails.

(b) Memory deletion

NOTICE:

Do not bring 2 or more electrical key transmitter sub-assemblies into the cabin.
Do not press and hold the door control switch on the multiplex network master switch assembly for 3 seconds or more.

(1) Sit on the driver seat carrying only the electrical key transmitter sub-assembly from which the seat position is to be deleted.

(2) With the power switch on (IG), the shift lever in P, the driver door closed and the SET seat memory switch being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the answer-back by the buzzer is confirmed.

HINT:

The door control switch on the multiplex network master switch assembly can be pressed to either the lock or unlock side.
The buzzer will sound for 0.5 seconds when the memory deletion is complete.
The buzzer will sound for 3 seconds if the memory deletion fails.

2. POSITION CONTROL ECU ASSEMBLY INITIALIZATION

NOTICE:

Initializing the position control ECU assembly will clear the seat position memory.

HINT:

Make sure to initialize the position control ECU assembly after replacing the seat assembly or any related parts.
Before initializing the position control ECU assembly, make sure that the D/C CUT fuse is normal.
When any of the following conditions are met, the seat position information in the position control ECU assembly will be cleared.
- The power switch is turned off with any of the seat switches being operated and the D/C CUT fuse removed.
- The power switch is turned off within 1 second of any of the seat switches being operated with the D/C CUT fuse removed.
- Power supplied to the position control ECU assembly is cut while the seat is moving to the memorized position.

(a) Turn the power switch on (IG).

(b) Operate the slide and vertical power seat switch knob to tilt the front of the power seat downward 3 times.

(c) Within 10 seconds of operating the slide and vertical power seat switch knob, simultaneously operate and hold the reclining power seat switch knob and slide and vertical power seat switch knob to recline and move the power seat upward until a buzzer sounds.

(d) Operate and hold the slide power seat switch knob to move the power seat to the foremost position. Continue holding the switch for 1 second after the seat has stopped.

(e) Operate and hold the reclining power seat switch knob to move the seatback to the foremost position. Continue holding the switch for 1 second after the seatback has stopped.

(f) Operate and hold the lifter power seat switch knob to move the power seat to the lowermost position. Continue holding the switch for 1 second after the seat has stopped.

(g) Operate and hold the vertical power seat switch knob to move the seat cushion to the lowermost position. Continue holding the switch for 1 second after the seat cushion has stopped.

System Description

SYSTEM DESCRIPTION

FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION

The driver seat is equipped with slide, reclining, lifter, front vertical and lumbar support adjustment functions.
The memory call function uses the key ID code of each electrical key transmitter sub-assembly to memorize and recall the appropriate driving position for each individual who possesses a master key or sub key.

FUNCTION OF MAIN COMPONENT

Component		Function
Position control ECU assembly		Receives position signals from the position sensors. Outputs seat adjuster signals to the separate type front seat cushion spring assembly LH, front seatback frame sub-assembly LH or lumbar support adjuster assembly LH to adjust the seat accordingly.
Separate type front seat cushion spring assembly LH	Slide motor	Receives signals from the position control ECU assembly, and slides the seat forward and rearward.
	Front vertical motor	Receives signals from the position control ECU assembly, and raises and lowers the front of the seat cushion.
	Lifter motor	Receives signals from the position control ECU assembly, and raises and lowers the seat cushion.
Front seatback frame sub-assembly LH	Reclining motor	Receives signals from the position control ECU assembly, and tilts the seatback forward and rearward.
Position sensor		Built into each motor and send position signals to the position control ECU assembly to detect the position of the seat.
Lumbar support adjuster assembly LH		Receives signals from the position control ECU assembly and operates the built-in motor to adjust the lumbar support.
Seat memory switch		If the SET switch is being pressed when one of the M1 or M2 seat memory switches is pressed, or if one of the M1 or M2 switches is pressed within 3 seconds of pressing the SET switch, the outer mirror control ECU assembly LH sends the signals so that the seat position can be stored. Then, when a seat memory switch is pressed, a signal is sent to the outer mirror control ECU assembly LH and the seat position changes according to memory.

SYSTEM OPERATION

The front power seat functions which can be operated by the power seat motors and memorized are shown below.

Seat Function	Driver Seat
Slide	Power and Memory
Reclining	Power and Memory
Front Vertical	Power and Memory
Lifter	Power and Memory
Lumbar Support Adjustment	Power

The seat memory switch sends memory switch information to the outer mirror control ECU assembly LH. Then the information is sent to the main body ECU (multiplex network body ECU) via CAN communication and then an instruction to memorize the seat position is sent to the position control ECU assembly via CAN communication. As a result, the seat position is memorized.

System Diagram

SYSTEM DIAGRAM

Communication Table

Sender	Receiver	Signal	Line
Hybrid Vehicle Control ECU Assembly	Main Body ECU (Multiplex Network Body ECU)	Shift position P signal	CAN
Outer Mirror Control ECU Assembly LH	Main Body ECU (Multiplex Network Body ECU)	M1 switch signal M2 switch signal SET switch signal	CAN
Main Body ECU (Multiplex Network Body ECU)	Position Control ECU Assembly	Shift position P signal Transmission information Driving position buzzer request Driver seat position request Driver seat position data	CAN
Certification ECU (Smart Key ECU Assembly)	Main Body ECU (Multiplex Network Body ECU)	Power switch signal Memory call replay request Key identification No. 1 to No. 7 acquisition condition	CAN
Position Control ECU Assembly	Main Body ECU (Multiplex Network Body ECU)	State signal of driver seat State signal of driving position buzzer	CAN
Multiplex Network Master Switch Assembly	Main Body ECU (Multiplex Network Body ECU)	Door control switch signal	LIN

Terminals Of Ecu

TERMINALS OF ECU

CHECK POSITION CONTROL ECU ASSEMBLY

(a) Disconnect the R33 and R32 position control ECU assembly connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
R33-3 (B) - Body ground	W - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V
R32-1 (IG) - Body ground	LG - Body ground	Ignition power supply	Power switch off	Below 1 V
R32-1 (IG) - Body ground	LG - Body ground	Ignition power supply	Power switch on (IG)	11 to 14 V
R32-15 (SYSB) - Body ground	W - Body ground	System power source	Always	11 to 14 V
R33-2 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
R32-27 (DBCL) - Body ground	P-W - Body ground	Driver seat belt buckle switch signal	Driver seat belt unfastened	10 kΩ or higher
R32-27 (DBCL) - Body ground	P-W - Body ground	Driver seat belt buckle switch signal	Driver seat belt fastened	Below 1 Ω

(d) Measure the voltage and resistance according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
R33-1 (SLD+) - Body ground	L - Body ground	Slide motor signal (forward)	Slide switch off	Below 1 V
R33-1 (SLD+) - Body ground	L - Body ground	Slide motor signal (forward)	Slide switch on (Forward)	11 to 14 V
R33-5 (SLD-) - Body ground	GR - Body ground	Slide motor signal (rearward)	Slide switch off	Below 1 V
R33-5 (SLD-) - Body ground	GR - Body ground	Slide motor signal (rearward)	Slide switch on (Rearward)	11 to 14 V
R33-6 (LFT+) - Body ground	G - Body ground	Lifter motor signal (upward)	Lifter switch off	Below 1 V
R33-6 (LFT+) - Body ground	G - Body ground	Lifter motor signal (upward)	Lifter switch on (Upward)	11 to 14 V
R30-5 (LFT-) - Body ground	BR - Body ground	Lifter motor signal (downward)	Lifter switch off	Below 1 V
R30-5 (LFT-) - Body ground	BR - Body ground	Lifter motor signal (downward)	Lifter switch on (Downward)	11 to 14 V
R33-10 (RCL+) - Body ground	LG - Body ground	Reclining motor signal (forward)	Reclining switch off	Below 1 V
R33-10 (RCL+) - Body ground	LG - Body ground	Reclining motor signal (forward)	Reclining switch on (Forward)	11 to 14 V
R30-6 (RCL-) - Body ground	P - Body ground	Reclining motor signal (rearward)	Reclining switch off	Below 1 V
R30-6 (RCL-) - Body ground	P - Body ground	Reclining motor signal (rearward)	Reclining switch on (Rearward)	11 to 14 V
R33-7 (FRV+) - Body ground	B - Body ground	Front vertical motor signal (upward)	Front vertical switch off	Below 1 V
R33-7 (FRV+) - Body ground	B - Body ground	Front vertical motor signal (upward)	Front vertical switch on (Upward)	11 to 14 V
R30-4 (FRV-) - Body ground	R - Body ground	Front vertical motor signal (downward)	Front vertical switch off	Below 1 V
R30-4 (FRV-) - Body ground	R - Body ground	Front vertical motor signal (downward)	Front vertical switch on (Downward)	11 to 14 V
R33-9 (L+) - Body ground	Y - Body ground	Lumbar support adjuster motor signal (forward)	Lumbar support adjuster switch off	Below 1 V
R33-9 (L+) - Body ground	Y - Body ground	Lumbar support adjuster motor signal (forward)	Lumbar support adjuster switch on (Forward)	11 to 14 V
R30-3 (L-) - Body ground	V - Body ground	Lumbar support adjuster motor signal (rearward)	Lumbar support adjuster switch off	Below 1 V
R30-3 (L-) - Body ground	V - Body ground	Lumbar support adjuster motor signal (rearward)	Lumbar support adjuster switch on (Rearward)	11 to 14 V
R33-8 (LV+) - Body ground	O - Body ground	Lumbar support adjuster motor signal (upward)	Lumbar support adjuster switch off	Below 1 V
R33-8 (LV+) - Body ground	O - Body ground	Lumbar support adjuster motor signal (upward)	Lumbar support adjuster switch on (Upward)	11 to 14 V
R30-1 (LV-) - Body ground	GR-W - Body ground	Lumbar support adjuster motor signal (downward)	Lumbar support adjuster switch off	Below 1 V
R30-1 (LV-) - Body ground	GR-W - Body ground	Lumbar support adjuster motor signal (downward)	Lumbar support adjuster switch on (Downward)	11 to 14 V
R32-4 (LFLF) - Body ground	Y-B - Body ground	Front power seat switch LH (lumbar support adjuster switch (forward)) signal	Lumbar support adjuster switch off	11 to 14 V
R32-4 (LFLF) - Body ground	Y-B - Body ground		Lumbar support adjuster switch on (Forward)	Below 1 V
R32-18 (LFLR) - Body ground	V-B - Body ground	Front power seat switch LH (lumbar support adjuster switch (rearward)) signal	Lumbar support adjuster switch off	11 to 14 V
R32-18 (LFLR) - Body ground	V-B - Body ground		Lumbar support adjuster switch on (Rearward)	Below 1 Ω
R32-9 (SLDF) - Body ground	L-B - Body ground	Front power seat switch LH (slide switch (forward)) signal	Slide switch off	11 to 14 V
R32-9 (SLDF) - Body ground	L-B - Body ground	Front power seat switch LH (slide switch (forward)) signal	Slide switch on (Forward)	Below 1 V
R32-23 (SLDR) - Body ground	GR-B - Body ground	Front power seat switch LH (slide switch (rearward)) signal	Slide switch off	11 to 14 V
R32-23 (SLDR) - Body ground	GR-B - Body ground	Front power seat switch LH (slide switch (rearward)) signal	Slide switch on (Rearward)	Below 1 V
R32-8 (RCLF) - Body ground	LG-B - Body ground	Front power seat switch LH (reclining switch (forward)) signal	Reclining switch off	11 to 14 V
R32-8 (RCLF) - Body ground	LG-B - Body ground		Reclining switch on (Forward)	Below 1 V
R32-22 (RCLR) - Body ground	P-B - Body ground	Front power seat switch LH (reclining switch (rearward)) signal	Reclining switch off	11 to 14 V
R32-22 (RCLR) - Body ground	P-B - Body ground		Reclining switch on (Rearward)	Below 1 V
R32-3 (LVU) - Body ground	O-B - Body ground	Front power seat switch LH (lumbar support adjuster switch (upward)) signal	Lumbar support adjuster switch off	11 to 14 V
R32-3 (LVU) - Body ground	O-B - Body ground		Lumbar support adjuster switch on (Upward)	Below 1 V
R32-17 (LVD) - Body ground	GR-W - Body ground	Front power seat switch LH (lumbar support adjuster switch (downward)) signal	Lumbar support adjuster switch off	11 to 14 V
R32-17 (LVD) - Body ground	GR-W - Body ground		Lumbar support adjuster switch on (Downward)	Below 1 V
R32-6 (FRVU) - Body ground	B - Body ground	Front power seat switch LH (front vertical switch (upward)) signal	Front vertical switch off	11 to 14 V
R32-6 (FRVU) - Body ground	B - Body ground		Front vertical switch on (Upward)	Below 1 V
R32-20 (FRVD) - Body ground	R-B - Body ground	Front power seat switch LH (front vertical switch (downward)) signal	Front vertical switch off	11 to 14 V
R32-20 (FRVD) - Body ground	R-B - Body ground		Front vertical switch on (Downward)	Below 1 V
R32-7 (LFTU) - Body ground	G-B - Body ground	Front power seat switch LH (lifter switch (upward)) signal	Lifter switch off	11 to 14 V
R32-7 (LFTU) - Body ground	G-B - Body ground	Front power seat switch LH (lifter switch (upward)) signal	Lifter switch on (Upward)	Below 1 V
R32-21 (LFTD) - Body ground	BR-B - Body ground	Front power seat switch LH (lifter switch (downward)) signal	Lifter switch off	11 to 14 V
R32-21 (LFTD) - Body ground	BR-B - Body ground		Lifter switch on (Downward)	Below 1 V
R32-12 (SENG) - Body ground	BR - Body ground	Sensor ground	Always	Below 1 Ω

(e) Check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
R32-10 (SSFV) - Body ground	R - Body ground	Front vertical position signal	Front vertical function operating	4.8 to 5.1 V
R32-11 (SSRR) - Body ground	O - Body ground	Reclining position signal	Reclining function operating	4.8 to 5.1 V
R32-25 (SSRL) - Body ground	P - Body ground	Lifter position signal	Lifter function operating	4.8 to 5.1 V
R32-26 (SSRS) - Body ground	G - Body ground	Slide position signal	Slide function operating	4.8 to 5.1 V

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the I21 outer mirror control ECU assembly LH connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I21-6 (CPUB) - I21-7 (GND)	LA-L - W-B	Auxiliary battery power supply	Power switch off	11 to 14 V
I21-14 (BDR) - I21-7 (GND)	GR - W-B	Auxiliary battery power supply	Power switch off	11 to 14 V
I21-5 (SIG) - I21-7 (GND)	LA-B - W-B	Ignition power supply	Power switch on (IG)	11 to 14 V
I21-5 (SIG) - I21-7 (GND)	LA-B - W-B	Ignition power supply	Always	Below 1 V
I21-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(d) Measure the voltage according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I21-1 (MM) - I21-7 (GND)	GR - W-B	SET switch signal for seat memory switch	SET switch on	Below 1 V
I21-1 (MM) - I21-7 (GND)	GR - W-B	SET switch signal for seat memory switch	SET switch off	11 to 14 V
I21-2 (M1) - I21-7 (GND)	BR - W-B	M1 switch signal for seat memory switch	M1 switch on	Below 1 V
I21-2 (M1) - I21-7 (GND)	BR - W-B	M1 switch signal for seat memory switch	M1 switch off	11 to 14 V
I21-3 (M2) - I21-7 (GND)	R - W-B	M2 switch signal for seat memory switch	M2 switch on	Below 1 V
I21-3 (M2) - I21-7 (GND)	R - W-B	M2 switch signal for seat memory switch	M2 switch off	11 to 14 V

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
MB-31 (BECU) - Body ground	-	Auxiliary battery power supply	Power switch off	11 to 14 V
MB-32 (IG) - Body ground	-	Ignition power supply	Power switch on (IG)	11 to 14 V
MB-32 (IG) - Body ground	-	Ignition power supply	Power switch off	Below 1 V
MB-30 (ACC) - Body ground	-	Ignition power supply	Power switch on (ACC)	11 to 14 V
MB-30 (ACC) - Body ground	-	Ignition power supply	Power switch off	Below 1 V
MB-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω
G33-1 (FLCY) - Body ground	W - Body ground	Front door courtesy light switch assembly (driver door) input	Front door LH closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω

Wireless Transmitter Memory Function does not Operate

DESCRIPTION

With the power switch on (IG) and the driver door closed, pressing the manual lock or unlock switch on the multiplex network master switch assembly while holding a seat memory switch (M1 or M2 switch) will register the transmitter recognition code into the seat memory switch that was pressed. After registration is completed, the answer back buzzer sounds.

CAUTION / NOTICE / HINT

NOTICE:

The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.
The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Click here
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
Click here

PROCEDURE

1.	CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) Check the manual lock/unlock function by using the door control switch (multiplex network master switch assembly).

Click here

OK:

Manual lock/unlock function operates normally.

GO TO POWER DOOR LOCK CONTROL SYSTEM

2.	CHECK SMART KEY SYSTEM (for Start Function)

(a) Check that the hybrid control system starts normally when the power switch is pressed while carrying the electrical key transmitter sub-assembly and with the brake pedal depressed.

OK:

Hybrid control system starts normally.

GO TO SMART KEY SYSTEM (for Start Function)

3.	CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Check the seat position memory and restoring functions.

Click here

Result	Proceed to
OK	A
NG (Seat position memory function does not operate normally)	B
NG (Seat position restoring function does not operate normally)	C

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position)

4.	READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FL Door Courtesy SW

Front door courtesy light switch assembly (driver door) signal

ON or OFF

ON: Driver door open

OFF: Driver door closed

Body Electrical > Main Body > Data List

Tester Display
FL Door Courtesy SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit)

5.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)

(a) Check the memory registration of the memory call function.

Click here

OK:

A seat position can be registered normally.

GO TO STEP 8

6.	READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Mem SW No. w/KeyID1	Memory switch linked with key ID1	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID1 MEM SW1: M1 switch linked with key ID1 MEM SW2: M2 switch linked with key ID1 MEM SW3: M3 switch linked with key ID1*	-
Mem SW No. w/KeyID2	Memory switch linked with key ID2	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID2 MEM SW1: M1 switch linked with key ID2 MEM SW2: M2 switch linked with key ID2 MEM SW3: M3 switch linked with key ID2*	-
Mem SW No. w/KeyID3	Memory switch linked with key ID3	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID3 MEM SW1: M1 switch linked with key ID3 MEM SW2: M2 switch linked with key ID3 MEM SW3: M3 switch linked with key ID3*	-
Mem SW No. w/KeyID4	Memory switch linked with key ID4	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID4 MEM SW1: M1 switch linked with key ID4 MEM SW2: M2 switch linked with key ID4 MEM SW3: M3 switch linked with key ID4*	-
Mem SW No. w/KeyID5	Memory switch linked with key ID5	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID5 MEM SW1: M1 switch linked with key ID5 MEM SW2: M2 switch linked with key ID5 MEM SW3: M3 switch linked with key ID5*	-
Mem SW No. w/KeyID6	Memory switch linked with key ID6	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID6 MEM SW1: M1 switch linked with key ID6 MEM SW2: M2 switch linked with key ID6 MEM SW3: M3 switch linked with key ID6*	-
Mem SW No. w/KeyID7	Memory switch linked with key ID7	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID7 MEM SW1: M1 switch linked with key ID7 MEM SW2: M2 switch linked with key ID7 MEM SW3: M3 switch linked with key ID7*	-

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Body Electrical > Main Body > Data List

Tester Display
Mem SW No. w/KeyID1
Mem SW No. w/KeyID2
Mem SW No. w/KeyID3
Mem SW No. w/KeyID4
Mem SW No. w/KeyID5
Mem SW No. w/KeyID6
Mem SW No. w/KeyID7

OK:

A seat position memory switch is linked to the electrical key transmitter sub-assembly.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

7.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

A seat position can be registered and the automatic memory call function operates normally.

USE SIMULATION METHOD TO CHECK

GO TO OTHER DIAGNOSIS PROCEDURE (Wireless-linked Return Function does not Operate)

8.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

9.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)

(a) Check the memory registration of the memory call function.

Click here

OK:

A seat position can be registered normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

10.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

11.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)

(a) Check the memory registration of the memory call function.

Click here

OK:

A seat position can be registered normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Wireless-linked Return Function does not Operate

DESCRIPTION

When a door is unlocked using the wireless unlock function, the certification ECU (smart key ECU assembly) sends a key ID signal to the main body ECU (multiplex network body ECU). When a door is unlocked using the entry unlock function, the certification ECU (smart key ECU assembly) sends a door unlock signal and key ID signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives the door unlock signal, it stores the key ID. When the driver door is opened, the memory call information of the stored key ID is sent to each driving position related control ECU. Each control ECU receives the information and then performs the memory call operation according to predetermined control timing values.

CAUTION / NOTICE / HINT

NOTICE:

The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
Click here

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

(a) Check the operation of the power seat.

Click here

(b) Check the seat position memory function.

Click here

(d) Check the operation of memory registration of the memory call function.

Click here

Result	Proceed to
OK	A
NG (Power seat operation)	B
NG (Seat position memory function)	C
NG (Seat position restoration function)	D
NG (Memory registration)	E

GO TO PROBLEM SYMPTOMS TABLE

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position)

GO TO OTHER DIAGNOSIS PROCEDURE (Wireless Transmitter Memory Function does not Operate)

2.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

Result	Proceed to
Memory call function linked with the wireless unlock function does not operate.	A
Memory call function linked with the entry unlock function does not operate.	B
Memory call function linked with the wireless unlock function and entry unlock function both do not operate.	C

GO TO STEP 9

GO TO STEP 15

3.	CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check the wireless unlock function of the wireless door lock control system.

Click here

OK:

Wireless unlock function is normal.

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

4.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 7

5.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

6.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock function operates normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

7.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

8.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock function operates normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

9.	CHECK SMART KEY SYSTEM (for Entry Function)

(a) Check the entry unlock function of the smart key system (for entry function).

Click here

OK:

Entry unlock function is normal.

GO TO SMART KEY SYSTEM (for Entry Function)

10.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 13

11.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

12.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the entry unlock function operates normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

13.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

14.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the entry unlock function operates normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION (SMART KEY ECU ASSEMBLY)

15.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 18

16.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

17.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock and entry unlock function operate normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

18.	READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Mem SW No. w/KeyID1	Memory switch linked with key ID1	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID1 MEM SW1: M1 switch linked with key ID1 MEM SW2: M2 switch linked with key ID1 MEM SW3: M3 switch linked with key ID1*	-
Mem SW No. w/KeyID2	Memory switch linked with key ID2	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID2 MEM SW1: M1 switch linked with key ID2 MEM SW2: M2 switch linked with key ID2 MEM SW3: M3 switch linked with key ID2*	-
Mem SW No. w/KeyID3	Memory switch linked with key ID3	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID3 MEM SW1: M1 switch linked with key ID3 MEM SW2: M2 switch linked with key ID3 MEM SW3: M3 switch linked with key ID3*	-
Mem SW No. w/KeyID4	Memory switch linked with key ID4	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID4 MEM SW1: M1 switch linked with key ID4 MEM SW2: M2 switch linked with key ID4 MEM SW3: M3 switch linked with key ID4*	-
Mem SW No. w/KeyID5	Memory switch linked with key ID5	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID5 MEM SW1: M1 switch linked with key ID5 MEM SW2: M2 switch linked with key ID5 MEM SW3: M3 switch linked with key ID5*	-
Mem SW No. w/KeyID6	Memory switch linked with key ID6	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID6 MEM SW1: M1 switch linked with key ID6 MEM SW2: M2 switch linked with key ID6 MEM SW3: M3 switch linked with key ID6*	-
Mem SW No. w/KeyID7	Memory switch linked with key ID7	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID7 MEM SW1: M1 switch linked with key ID7 MEM SW2: M2 switch linked with key ID7 MEM SW3: M3 switch linked with key ID7*	-

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Body Electrical > Main Body > Data List

Tester Display
Mem SW No. w/KeyID1
Mem SW No. w/KeyID2
Mem SW No. w/KeyID3
Mem SW No. w/KeyID4
Mem SW No. w/KeyID5
Mem SW No. w/KeyID6
Mem SW No. w/KeyID7

(f) Enter the following menus: Body Electrical / Driver Seat / Data List.

(g) Read the Data List according to the display on the Techstream.

Body Electrical > Driver Seat > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Seat Memory No1

Seat position memorized with M1 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Seat Memory No2

Seat position memorized with M2 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Body Electrical > Driver Seat > Data List

Tester Display
Seat Memory No1
Seat Memory No2

OK:

A seat position has been memorized for the seat position memory switch linked to the electrical key transmitter sub-assembly. (For example, the value of "Mem SW No. w/KeyID1" is MEM SW1 and the value of "Seat Memory No1" is Mem.)

PERFORM MEMORY CALL REGISTRATION

19.	READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FL Door Courtesy SW

Front door courtesy light switch assembly (driver door) signal

ON or OFF

ON: Driver door open

OFF: Driver door closed

Body Electrical > Main Body > Data List

Tester Display
FL Door Courtesy SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit)

20.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

21.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call functions linked with the wireless unlock function and entry unlock function operate normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Front Power Seat Control System(for Gasoline Model With Memory)

Front Seat Assembly

See More:

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