Toyota Avalon (XX50): Front Seatback Heater

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Seat / Front Seatback Heater

Components

COMPONENTS

ILLUSTRATION

*1	FRONT SEAT CUSHION SHIELD	*2	FRONT SEAT FRONT CUSHION SHIELD
*3	FRONT SEAT INNER CUSHION SHIELD	-	-

ILLUSTRATION

*1	SEPARATE TYPE FRONT SEATBACK ASSEMBLY	*2	SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": Nm (kgfcm, ft.*lbf)	-	-

ILLUSTRATION

*1	FRONT SEAT HEADREST SUPPORT	*2	SEPARATE TYPE FRONT SEATBACK COVER WITH PAD
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

*1	FRONT SEATBACK HEATER ASSEMBLY	*2	SEPARATE TYPE FRONT SEATBACK COVER
*3	SEPARATE TYPE FRONT SEATBACK PAD	*4	TAG PIN
*5	HOG RING	-	-
●	Non-reusable part	-	-

Inspection

INSPECTION

PROCEDURE

1. INSPECT FRONT SEATBACK HEATER ASSEMBLY LH

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Seat heater temperature 23°C (73°F)	4.2 to 5.2 Ω

If the result is not as specified, replace the front seatback heater assembly LH.

*a	Component without harness connected (Front Seatback Heater Assembly LH)

2. INSPECT FRONT SEATBACK HEATER ASSEMBLY RH

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Seat heater temperature 23°C (73°F)	4.2 to 5.2 Ω

If the result is not as specified, replace the front seatback heater assembly RH.

*a	Component without harness connected (Front Seatback Heater Assembly RH)

Installation

INSTALLATION

CAUTION / NOTICE / HINT

CAUTION:

Wear protective gloves. Sharp areas on the parts may injure your hands.

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

PROCEDURE

1. INSTALL FRONT SEATBACK HEATER ASSEMBLY

(a) Install the front seatback heater assembly to the separate type front seatback cover with 16 new tag pins.

2. INSTALL SEPARATE TYPE FRONT SEATBACK COVER

Click here

3. INSTALL SEPARATE TYPE FRONT SEATBACK COVER WITH PAD

Click here

4. INSTALL FRONT SEAT HEADREST SUPPORT

Click here

5. INSTALL SEPARATE TYPE FRONT SEATBACK ASSEMBLY

Click here

6. INSTALL FRONT SEAT INNER CUSHION SHIELD

Click here

7. INSTALL FRONT SEAT CUSHION SHIELD

Click here

8. INSTALL FRONT SEAT FRONT CUSHION SHIELD

Click here

9. CONNECT SEPARATE TYPE FRONT SEATBACK COVER

Click here

10. INSTALL FRONT SEAT ASSEMBLY

Click here

Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during front seatback heater assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced (for Gasoline Model)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
*: When performing learning using the Techstream. Click here
Disconnect cable from negative auxiliary battery terminal	Perform steering sensor zero point calibration	Lane departure alert system (w/ Steering Control)
		Pre-collision system
		Intelligent clearance sonar system*
		Lighting system (for Gasoline Model with Cornering Light)
	Memorize steering angle neutral point	Parking assist monitor system
	Memorize steering angle neutral point	Panoramic view monitor system
Occupant detection ECU Front passenger seat	Zero point calibration (Occupant classification system)	Occupant classification system Passenger airbag ON/OFF indicator Airbag system (Front passenger side) Seat belt warning system (Front passenger)
Separate type front seat cushion spring assembly LH Front seatback frame sub-assembly LH Position control ECU assembly	Initialize position control ECU	Front power seat control system

Necessary Procedures After Parts Removed/Installed/Replaced (for HV Model)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
*: When performing learning using the Techstream. Click here
Disconnect cable from negative auxiliary battery terminal	Perform steering sensor zero point calibration	Lane departure alert system (w/ Steering Control)
		Pre-collision system
		Intelligent clearance sonar system*
		Lighting system (for HV Model with Cornering Light)
	Memorize steering angle neutral point	Parking assist monitor system
	Memorize steering angle neutral point	Panoramic view monitor system
Occupant detection ECU Front passenger seat	Zero point calibration (Occupant classification system)	Occupant classification system Passenger airbag ON/OFF indicator Airbag system (Front passenger side) Seat belt warning system (Front passenger)
Separate type front seat cushion spring assembly LH Front seatback frame sub-assembly LH Position control ECU assembly	Initialize position control ECU	Front power seat control system

CAUTION:

Be sure to read Precaution thoroughly before servicing.
for Gasoline Model: Click here

for HV Model: Click here
Wear protective gloves. Sharp areas on the parts may injure your hands.

HINT: