Toyota Yaris: Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly via LIN communication system. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The power door lock control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power door lock control system after confirming that the communication systems are functioning properly.
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If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.
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PROCEDURE

1.	CHECK POWER WINDOW CONTROL SYSTEM

(a) Check the power window operation using the multiplex network master switch assembly.

OK:

Each power window operates normally.

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

2.	READ VALUE USING GTS (Door Lock Switch Status, Door Unlock Switch Status)

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

Body Electrical > Master Switch > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Door Lock Switch Status	Multiplex network master switch assembly lock signal	OFF or ON	OFF: Lock side of multiplex network master switch assembly not pushed ON: Lock side of multiplex network master switch assembly pushed	-
Door Unlock Switch Status	Multiplex network master switch assembly unlock signal	OFF or ON	OFF: Unlock side of multiplex network master switch assembly not pushed ON: Unlock side of multiplex network master switch assembly pushed	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Lock Switch Status

Multiplex network master switch assembly lock signal

OFF or ON

OFF: Lock side of multiplex network master switch assembly not pushed

ON: Lock side of multiplex network master switch assembly pushed

Door Unlock Switch Status

Multiplex network master switch assembly unlock signal

OFF or ON

OFF: Unlock side of multiplex network master switch assembly not pushed

ON: Unlock side of multiplex network master switch assembly pushed

Body Electrical > Master Switch > Data List

Tester Display
Door Lock Switch Status
Door Unlock Switch Status

OK:

On the GTS screen, ON or OFF is displayed for each item according to the table above.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

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Other information:

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Utility

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Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Electronic Circuit Inspection Procedure

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