Toyota Yaris: Power Door Lock Control System / Problem Symptoms Table

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.

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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.

Symptom	Suspected Area	Link
All doors lock/unlock functions do not operate via door key cylinder.	Main body ECU (Multiplex network body ECU)
	Front door lock with motor assembly LH
	Harness or connector
All doors lock/unlock functions do not operate via master switch.	Main body ECU (Multiplex network body ECU)
	Multiplex network master switch assembly
All doors lock function do not operate via door control switch and door key cylinder.	Power distribution box assembly
	Main body ECU (Multiplex network body ECU)
All doors unlock function do not operate via door control switch and door key cylinder.	Power distribution box assembly
	Main body ECU (Multiplex network body ECU)
Only driver door lock/unlock functions do not operate.	Front door lock with motor assembly LH
	Harness or connector	-
	Power distribution box assembly
Only driver door unlock function does not operate (lock function operates).	Front door lock with motor assembly LH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Power distribution box assembly
Only front passenger door lock/unlock functions do not operate.	Front door lock with motor assembly RH
	Harness or connector	-
Key lock-in prevention function does not operate.	Front door courtesy light switch assembly LH
	Front door courtesy light switch assembly RH
	Front door lock with motor assembly LH
	Front door lock with motor assembly RH
	Main body ECU (Multiplex network body ECU)
	Power distribution box assembly
Only back door open function does not operate.	Smart key system (for Entry Function)
	Back door opener switch assembly
	Back door lock assembly with courtesy light switch
	Harness or connector
	Power distribution box assembly
	Main body ECU (Multiplex network body ECU)
Lock operation continues even after doors have been locked.*1	Front door lock with motor assembly LH
	Front door lock with motor assembly RH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Power distribution box assembly

*1: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 2 times.

Initialization

INITIALIZATION BACK DOOR LOCK (a) When the auxiliary battery is reconnected: If the back door is locked and therefore cannot be opened, it is necessary to unlock the back door using the door control switch, electrical key transmitter sub-assembly switch...

Terminals Of Ecu

TERMINALS OF ECU CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 Power Distribution Box Assembly *2 Main Body ECU (Multiplex Network Body ECU) (a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly...

Other information:

Toyota Yaris XP210 (2020-2025) Owner's Manual: Installing Child-Restraint Systems

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Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid (B279986)

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