Toyota Avalon (XX50): Dtc Check / Clear. Engine does not Start. How To Proceed With Troubleshooting

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function, Gasoline Model) / Dtc Check / Clear. Engine does not Start. How To Proceed With Troubleshooting

Dtc Check / Clear

DTC CHECK / CLEAR

NOTICE:

When DTC is output, Be sure to confirm and record.
DTCs may have been stored due to problems unrelated to the steering lock function. Be sure to confirm and record any DTCs output for other systems.
When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
The steering lock ECU (steering lock actuator or upper bracket assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the engine switch off or clear the DTCs until the DTCs are confirmed and recorded.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.

Body Electrical > Smart Key > Trouble Codes

(e) Enter the following menus: Body Electrical / Power Source Control / Trouble Codes.

Body Electrical > Power Source Control > Trouble Codes

(f) Enter the following menus: Body Electrical / Starting Control / Trouble Codes.

Body Electrical > Starting Control > Trouble Codes

(g) Check for DTCs.

Click here

HINT:

The steering lock system DTCs are output from the steering lock ECU (steering lock actuator or upper bracket assembly) via the certification ECU (smart key ECU assembly).
When any DTC is not output and security indicator light does not blink, problems may be caused by the following:
- Open in TC circuit between DLC3 connector and related ECU
- Malfunction of related ECU

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.

Body Electrical > Smart Key > Clear DTCs

(e) Enter the following menus: Body Electrical / Power Source Control / Trouble Codes.

Body Electrical > Power Source Control > Clear DTCs

(f) Enter the following menus: Body Electrical / Starting Control / Trouble Codes.

Body Electrical > Starting Control > Clear DTCs

(g) Clear the DTCs.

Engine does not Start

DESCRIPTION

When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift lever is in P and the brake pedal is depressed, the engine can be started by pressing the engine switch. If the steering is unlocked, the engine can also be started by pressing the engine switch with the shift lever in N and the brake pedal depressed.

Related Data List and Active Test Items

Problem Symptom	Data List and Active Test
Engine does not start	Power Source Control Stop Light Switch1 Steering Unlock Switch Shift P Signal Neutral SW/ Clutch SW IG Relay Monitor (Inside) IG Relay Monitor (Outside) Latch Circuit Starter Request Signal Power Supply Condition Smart Key Immobiliser Engine Start Request L Code Check Starting Control Starter SW Shift Position P or N Ignition

Problem Symptom

Data List and Active Test

Engine does not start

Power Source Control

Stop Light Switch1
Steering Unlock Switch
Shift P Signal
Neutral SW/ Clutch SW
IG Relay Monitor (Inside)
IG Relay Monitor (Outside)
Latch Circuit
Starter Request Signal
Power Supply Condition

Smart Key

Immobiliser
Engine Start Request
L Code Check

Starting Control

Starter SW
Shift Position P or N
Ignition

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
The smart key system (for Start Function, Gasoline Model) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function, Gasoline Model) after confirming that the communication systems are functioning properly.
Click here
If the smart key system (for Start Function, Gasoline Model) has been disabled, enable the system before performing troubleshooting.
Click here
Inspect the fuses of circuits related to this system before performing the following procedure.
Before replacing the certification ECU (smart key ECU assembly) or an electrical key transmitter sub-assembly, refer to Registration.
Click here
After completing repairs, confirm that the problem does not recur.
After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."

HINT:

If the engine switch is changed from on (IG) to on (ACC) with the shift lever in any position other than P, and then the shift lever is moved to P and the engine switch is pressed with the brake pedal depressed, the engine switch will turn off.
If the brake pedal is repeatedly depressed while the engine is stopped, the brake booster pressure will be released and the force required to depress the brake pedal to illuminate the stop lights will increase.

PROCEDURE

1.	CHECK ENGINE CRANKING OPERATION

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the engine switch and check that the engine cranks.

Result	Proceed to
Engine cranks and initial combustion occurs	A
Engine cranks but initial combustion does not occur	B
Engine does not crank	C

GO TO OTHER PROBLEM (Immobiliser System does not Operate Properly)

GO TO SFI SYSTEM

2.	CHECK ENGINE SWITCH CONDITION

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

Result	Proceed to
Power source mode changes : Off → on (ACC) → on (IG) → off	A
Power source mode does not change to on (ACC) or on (IG)	B
Power source mode changes to on (IG) but not to on (ACC)	C
Power source mode changes to on (ACC) but not to on (IG)	D

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG and ACC))

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (ACC))

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG))

3.	READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Power Source Control / Data List.

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

Body Electrical > Power Source Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Stop Light Switch1	State of brake pedal	OFF or ON	OFF: Brake pedal released ON: Brake pedal depressed	Use this item to determine if the stop light switch assembly is malfunctioning. The engine cannot be started when this item is OFF. If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light Switch1

State of brake pedal

OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed

Use this item to determine if the stop light switch assembly is malfunctioning.
The engine cannot be started when this item is OFF.
If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display
Stop Light Switch1

OK:

The Techstream display changes correctly in response to the brake pedal operation.

GO TO STEP 12

4.	READ VALUE USING TECHSTREAM (NEUTRAL SW/ CLUTCH SW, SHIFT POSITION P OR N)

(a) Enter the following menus: Body Electrical / Power Source Control or Starting Control / Data List.

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

Body Electrical > Power Source Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Neutral SW/ Clutch SW	Shift position (P and N)	OFF or ON	OFF: Shift lever in any position other than P or N ON: Shift lever in P or N	Use this item to determine if the park/neutral position switch assembly is malfunctioning. When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Neutral SW/ Clutch SW

Shift position (P and N)

OFF or ON

OFF: Shift lever in any position other than P or N

ON: Shift lever in P or N

Use this item to determine if the park/neutral position switch assembly is malfunctioning.
When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.

Body Electrical > Power Source Control > Data List

Tester Display
Neutral SW/ Clutch SW

Body Electrical > Starting Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Shift Position P or N	Park/Neutral position switch status	OFF or ON	OFF: Shift lever not in P or N ON: Shift lever in P or N	When OFF is displayed, the engine will not crank.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift Position P or N

Park/Neutral position switch status

OFF or ON

OFF: Shift lever not in P or N

ON: Shift lever in P or N

When OFF is displayed, the engine will not crank.

Body Electrical > Starting Control > Data List

Tester Display
Shift Position P or N

OK:

The Techstream display changes correctly in response to the shift lever operation.

GO TO STEP 14

5.	READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)

(a) Enter the following menus: Body Electrical / Power Source Control / Data List.

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

Body Electrical > Power Source Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Starter Request Signal	Engine start request signal status	OFF or ON	OFF: The engine switch is not pressed ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held	When the engine cannot be started due to a start request signal malfunction, OFF is displayed. When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Starter Request Signal

Engine start request signal status

OFF or ON

OFF: The engine switch is not pressed

ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held

When the engine cannot be started due to a start request signal malfunction, OFF is displayed.
When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display
Starter Request Signal

NOTICE:

Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the engine switch.

OK:

The Techstream display changes correctly in response to the engine switch operation.

GO TO STEP 16

6.	READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(d) According to the display on the Techstream, read the Data List while pressing the engine switch with the brake pedal depressed.

Body Electrical > Starting Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Starter SW	Starter operation request	OFF or ON	OFF: Starter operation not requested ON: Starter operation requested	When OFF is displayed, the engine will not crank.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Starter SW

Starter operation request

OFF or ON

OFF: Starter operation not requested

ON: Starter operation requested

When OFF is displayed, the engine will not crank.

Body Electrical > Starting Control > Data List

Tester Display
Starter SW

OK:

The Techstream display changes.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

7.	INSPECT ST RELAY

(a) Inspect the ST relay.

Click here

REPLACE ST RELAY

8.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 2 - Body ground	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher* → 1.0 V or less

HINT:

*: While the engine is cranking, the battery voltage may drop to approximately 6 V.

*1	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY (ST Relay Holder)

GO TO STEP 17

9.	CHECK HARNESS AND CONNECTOR (ST RELAY - BATTERY AND GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 1 - Body ground	Always	Below 1 Ω

*1	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY (ST Relay Holder)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
No.1 engine room relay block and No.1 junction block assembly ST relay terminal 5 - Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - ST RELAY)

(a) Disconnect the C58 starter assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 3 - C58-1	Always	Below 1 Ω
No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 3 or C58-1 - Other terminals and body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.	CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - BATTERY)

(a) Disconnect the C70 starter assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
C70-1 - Body ground	Always	11 to 14 V

REPLACE STARTER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.	INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Inspect the stop light switch assembly.

Click here

REPLACE STOP LIGHT SWITCH ASSEMBLY

13.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

(a) Disconnect the A33 stop light switch assembly connector.

(b) Disconnect the K10 certification ECU (smart key ECU assembly) connector.

(d) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(e) Disconnect the G21 shift lock control unit assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K10-25 (STP1) - A33-3 (L)	Always	Below 1 Ω
K10-25 (STP1) or A33-3 (L) - Other terminals and body ground	Always	10 kΩ or higher

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.	INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Remove the park/neutral position switch assembly.

Click here

(b) Inspect the park/neutral position switch assembly.

Click here

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

15.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the A10 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A10-9 (STAR) - C53-4 (B)	Always	Below 1 Ω
A10-9 (STAR) or C53-4 (B) - Other terminals and body ground	Always	10 kΩ or higher

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.	CHECK STEERING LOCK FUNCTION

(a) Check that the steering unlocks when the engine switch is turned on (ACC).

OK:

The steering unlocks.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

GO TO OTHER PROBLEM (Unable to Unlock Steering Wheel (Engine cannot Start))

17.	CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A10-9 (STAR) - Body ground	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher* → 1.0 V or less

HINT:

*: While the engine is cranking, the battery voltage may drop to approximately 6 V.

*a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

18.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the A10 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the C53 park/neutral position switch assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A10-9 (STAR) - C53-4 (B)	Always	Below 1 Ω
A10-9 (STAR) or C53-4 (B) - Other terminals and body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

19.	CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Install the ST relay to the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A10-20 (STA) - Body ground	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher* → 1.0 V or less

HINT:

*: While the engine is cranking, the battery voltage may drop to approximately 6 V.

*a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

20.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY)

(a) Disconnect the A10 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A10-20 (STA) - No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 2	Always	Below 1 Ω
A10-20 (STA) or No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 2 - Other terminals and body ground	Always	10 kΩ or higher

*1	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY (ST Relay Holder)

REPAIR OR REPLACE HARNESS OR CONNECTOR

21.	CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C53-9 (L) - No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 2	Always	Below 1 Ω
C53-9 (L) or No. 1 engine room relay block and No. 1 junction block assembly ST relay terminal 2 - Other terminals and body ground	Always	10 kΩ or higher

*1	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY (ST Relay Holder)

GO TO SFI SYSTEM

REPAIR OR REPLACE HARNESS OR CONNECTOR

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

NOTICE:

Do not perform "Smart Code Reset" (all key ID erasure) until all malfunctions and symptoms have been confirmed and resolved. If all key ID erasure is performed without confirming or resolving malfunctions, key registration will be unable to be performed, resulting in unnecessary part replacement.
Make sure that the smart key system has not been disabled by a customize setting.

HINT:

Replace parts related to the wireless door lock control system and smart key system according to the inspection procedure.
If the wireless door lock control system and smart key system do not operate, check the customize settings and make sure that the wireless door lock control system and smart key system are not disabled.
The wireless door lock control system and smart key system primarily use the following systems.
- Power door lock control system
- Wireless door lock control system
- Smart key system (for Entry Function, Gasoline Model)
- Smart key system (for Start Function, Gasoline Model)
  - Steering lock function
  - Immobiliser function
If 2 or more electrical key transmitter sub-assemblies are registered to the system, make sure to perform troubleshooting with all of them.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

(a) Confirm how the vehicle was brought to the workshop.

Vehicle was driven.
Vehicle was towed.

HINT:

The cause of the malfunction may be narrowed down by confirming whether the vehicle was driven or towed.

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past malfunctions that seem unrelated may also help in some cases.

The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date and time, frequency, whether the problem occurred recently or has been occurring for a long time
Where	Whether the problem occurs at specified location
Under what conditions?	Whether the doors were locked or unlocked, whether the engine switch was on (IG), whether the engine was running
How did it happen?	Ask the customer for details about the vehicle operating conditions, environment and malfunction.

3.	BASIC CHECK

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

HINT:

A simple method to determine whether the battery is depleted is to operate the horn.
If the battery voltage is below 11 V, recharge or replace the battery.

(b) Check for blown fuses, open or shorted wire harnesses, improperly connected connectors and other problems in areas that can be visually inspected.

4.	CHECK DTCS AND SAVE OPERATION HISTORY

(a) Using the Techstream, enter the following menus: System Select / Health Check

HINT:

If DTCs are output, perform troubleshooting for the DTCs.
Save all output DTCs and operation history.
Operation history can also be checked using the Utility menu of the Techstream.
Click here

Result	Proceed to
No DTCs are output	A
Wireless door lock system and smart key system DTCs are output	B
DTCs other than wireless door lock system and smart key system DTCs are output	C

GO TO DIAGNOSTIC TROUBLE CODE CHART

5.	CHECK PROBLEM SYMPTOMS

(a) Based on the customer problem analysis, check the problem symptoms.

Click here

Result	Proceed to
The problem symptom can be confirmed	A
The problem symptom cannot be confirmed	B

GO TO CHECK FOR INTERMITTENT PROBLEMS

6.	CHECK CUSTOMIZE ITEMS

(a) Use the following customize setting methods to confirm that the smart key system is enabled.

Using manual operation

Check the customize settings.

Click here

(b) Use the following customize setting methods to confirm that the wireless door lock system is enabled.

Using the Techstream
Using the multi-display

Check the customize settings.

Click here

HINT:

Even when the smart key system is disabled by a customize setting, the engine can be started by an emergency key operation.
If the smart key system or wireless door lock control system is disabled, all entry and start functions or wireless functions will not operate.

Result	Proceed to
Wireless door lock control system and smart key system are enabled	A
Smart key system is disabled	B
Wireless door lock system is disabled	C

GO TO CUSTOMIZE PARAMETERS

7.	CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) Check the power door lock control system.

Click here

Result	Proceed to
Power door lock control system operates properly	A
Power door lock control system does not operate properly	B

GO TO POWER DOOR LOCK CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

8.	CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check the wireless door lock control system.

Click here

Result	Proceed to
All functions operate properly	A
Wireless lock/unlock functions do not operate (entry and start functions also do not operate)	B
Wireless lock/unlock functions do not operates (entry and start functions operate)	C
Only luggage door open function does not operate	D
Door ajar warning function does not operate	E
Answer-back function does not operate	F
Door locks or unlocks, even though wireless lock/unlock function was not operated	G

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (All door entry lock/unlock functions and wireless functions do not operate)

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

GO TO LUGGAGE COMPARTMENT DOOR OPENER SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

GO TO LIGHTING SYSTEM (Front/Rear Door Courtesy Switch Circuit)

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (No Answer-Back)

GO TO POWER DOOR LOCK CONTROL SYSTEM (Improper Operation)

9.	CHECK SMART KEY SYSTEM (for Entry Function, Gasoline Model)

(a) Check the smart key system (for Entry Function, Gasoline Model).

Click here

Result	Proceed to
All functions operate properly	A
Entry lock/unlock functions do not operate for all doors (wireless function also does not operate)	B
Entry lock/unlock functions do not operate for all doors (wireless function operates))	C
Entry lock/unlock functions do not operate only for driver side door	D
Entry lock/unlock functions do not operate only for front passenger side door	E
Entry lock function does not operate only for driver side door (unlock function operates)	F
Entry lock function does not operate only for passenger side door (unlock function operates)	G
Entry unlock function does not operate only for driver side door (lock function operates)	H
Entry unlock function does not operate only for passenger side door (lock function operates)	I
Luggage door open function does not operate	J
Luggage lock-in prevention function does not operate (Luggage door does not open)	K
Smart key system exterior warning and answer-back buzzer do not sound	L
Smart key system interior warning does not sound	M

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (All door entry lock/unlock functions and wireless functions do not operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Driver Side Door Entry Lock and Unlock Functions do not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Front Passenger Side Door Entry Lock and Unlock Functions do not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Driver Side Door Entry Lock Function does not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Front Passenger Side Door Entry Lock Function does not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Driver Side Door Entry Unlock Function does not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Front Passenger Side Door Entry Unlock Function does not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Key Luggage Compartment Lock-in Prevention Function does not Operate)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Entry Exterior Alarm and Answer-back Buzzer do not Sound)

GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (Entry Interior Alarm does not Sound)

10.	CHECK SMART KEY SYSTEM (for Start Function, Gasoline Model)

(a) Check the smart key system (for Start Function, Gasoline Model).

Click here

Engine started

Result	Proceed to
All functions operate properly	A
Power source mode changing function does not operate correctly (power source mode cannot be changed to on (ACC), but can be changed to on (IG))	B
Steering lock function does not operate	C
Security indicator light does not blink	D

Engine did not start

Result	Proceed to
Push-button start function does not operate	E
Immobiliser function does not operate	F
Steering wheel cannot be unlocked	G
Power source mode changing function does not operate (power source mode cannot be changed to on (ACC) or on (IG))	H
Power source mode changing function does not operate correctly (power source mode can be changed to on (ACC), but not on (IG))	I
Immobiliser function does not operate (security indicator light does not turn off)	J

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Power Source Mode does not Change to ON (ACC))

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Steering Lock does not Lock)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Security Indicator Light Does not Blink)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Engine does not Start)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Immobiliser System does not Operate Properly)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Unable to Unlock Steering Wheel (Engine cannot Start))

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Power Source Mode does not Change to ON (IG and ACC))

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Power Source Mode does not Change to ON (IG))

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Immobiliser System does not Operate Properly)

11.	CHECK ELECTRICAL KEY REGISTRATION FUNCTION

(a) Check the electrical key registration function.

Click here

Result	Proceed to
Electrical key registration function operates properly	A
Cannot register new keys	B
Cannot register additional keys	C
Additional key registration display is not displayed	D

USE SIMULATION METHOD TO CHECK

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (New Key cannot be Registered)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (Additional Key cannot be Registered)

GO TO SMART KEY SYSTEM (for Start Function, Gasoline Model) (New Key Registration Warning Message is not Displayed)

Customize Parameters. Data List / Active Test. Diagnostic Trouble Code Chart

Immobiliser System does not Operate Properly. New Key cannot be Registered. New Key Registration Warning Message is not Displayed

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Short in P Squib (Dual Stage - 2nd Step) Circuit (B1815-B1818)
DESCRIPTION The front passenger squib 2nd step circuit consists of the airbag ECU assembly and instrument panel passenger airbag assembly. The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met. These DTCs are stored when a malfunction is detected in the fr ...