Toyota Yaris: Wireless Door Lock Control System / No Answer-Back

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Door Lock / Wireless Door Lock Control System / No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning light do not operate. In such cases, hazard warning light outputs from the main body ECU (multiplex network body ECU) may be malfunctioning.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The wireless door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the wireless door lock control system after confirming that the communication system is functioning properly.
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Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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Before performing the inspection, check that DTC B124296 is not output.

PROCEDURE

1.	CHECK CUSTOMIZE SETTING USING GTS (Hazard Answer Back Function)

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

Wireless Door Lock

Tester Display	Description	Default	Setting	ECU
Hazard Answer Back Function	Function that flashes the hazard warning lights once when the doors are locked by wireless operation and twice when the doors are unlocked by wireless operation	Enable	$00:Disable,$01:Enable	Main body ECU (Multiplex network body ECU)

Result	Proceed to
Customize setting is Enable	A
Customize setting is Disable	B

PERFORM CUSTOMIZE FUNCTION

2.	CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS

(a) Check the wireless door lock control function using the electrical key transmitter sub-assembly.

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Result	Proceed to
Wireless door lock/unlock operates properly	A
Wireless door lock/unlock does not operate properly	B

GO TO PROBLEM SYMPTOMS TABLE

3.	READ VALUE USING GTS (FR Door Lock Pos, FL Door Lock Pos)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Door Lock Position Switch Status	Front door RH unlock detection switch signal	Lock or Unlock	Lock: Front door RH locked Unlock: Front door RH unlocked	-
FL Door Lock Position Switch Status	Front door LH unlock detection switch signal	Lock or Unlock	Lock: Front door LH locked Unlock: Front door LH unlocked	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FR Door Lock Position Switch Status

Front door RH unlock detection switch signal

Lock or Unlock

Lock: Front door RH locked

Unlock: Front door RH unlocked

FL Door Lock Position Switch Status

Front door LH unlock detection switch signal

Lock or Unlock

Lock: Front door LH locked

Unlock: Front door LH unlocked

Body Electrical > Main Body > Data List

Tester Display
FR Door Lock Position Switch Status
FL Door Lock Position Switch Status

OK:

The GTS display changes correctly in response to the lock/unlock operation.

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit)

4.	CHECK HAZARD WARNING LIGHTS OPERATION

(a) Check that the hazard warning lights blink when the hazard warning signal switch is pressed.

OK:

Hazard warning lights blink.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit)

Wireless Door Lock Tuner Component Internal Failure (B124296)

DESCRIPTION The smart door control receiver assembly is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly...

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