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

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

DESCRIPTION

The main body ECU (multiplex network body ECU) receives door key cylinder lock or unlock switch signals from the front door lock with motor assembly LH. 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:

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

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PROCEDURE

1.	READ VALUE USING GTS (Door Lock Switch Status by a Mechanical Key (D/P Door), Door Unlock Switch Status by a Mechanical Key (D Door))

(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
Door Lock Switch Status by a Mechanical Key (D/P Door)	Driver door key-linked switch lock signal	OFF or ON	OFF: Driver door key cylinder not turned to lock position ON: Driver door key cylinder turned to lock position	-
Door Unlock Switch Status by a Mechanical Key (D Door)	Driver door key-linked switch unlock signal	OFF or ON	OFF: Driver door key cylinder not turned to unlock position ON: Driver door key cylinder turned to unlock position	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Lock Switch Status by a Mechanical Key (D/P Door)

Driver door key-linked switch lock signal

OFF or ON

OFF: Driver door key cylinder not turned to lock position

ON: Driver door key cylinder turned to lock position

Door Unlock Switch Status by a Mechanical Key (D Door)

Driver door key-linked switch unlock signal

OFF or ON

OFF: Driver door key cylinder not turned to unlock position

ON: Driver door key cylinder turned to unlock position

Body Electrical > Main Body > Data List

Tester Display
Door Lock Switch Status by a Mechanical Key (D/P Door)
Door Unlock Switch Status by a Mechanical Key (D Door)

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)

2.	INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

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REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

3.	CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the L11 front door lock with motor assembly LH connector.

(b) Disconnect the H4 main body ECU (multiplex network body ECU) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
L11-9 (L) - H4-28 (L2)	Always	Below 1 Ω
L11-10 (UL) - H4-4 (UL3)	Always	Below 1 Ω
L11-7 (E) - Body ground	Always	Below 1 Ω
L11-9 (L) or H4-28 (L2) - Other terminals and body ground	Always	10 kΩ or higher
L11-10 (UL) or H4-4 (UL3) - Other terminals and body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST HINT: Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts...

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...

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