Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Door Lock / Power Door Lock Control System(for Gasoline Model) / All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

DESCRIPTION

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

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM (Door Key SW-Lock, D Door Key SW-UL)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Key SW-Lock

Driver door key-linked lock / unlock 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

-

D Door Key SW-UL

Driver door key-linked lock / unlock 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 Key SW-Lock

D Door Key SW-UL
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

2.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

(a) Remove the front door lock with motor assembly LH.

Click here

(b) Inspect the front door lock with motor assembly LH.

Click here

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

OK

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 G34 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I27-9 (L) - G34-18 (L2)

Always

Below 1 Ω

I27-10 (UL) - G34-17 (UL3)

Always

Below 1 Ω

I27-7 (E) - Body ground

Always

Below 1 Ω

I27-9 (L) or G34-18 (L2) - Body ground

Always

10 kΩ or higher

I27-10 (UL) or G34-17 (UL3) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

    All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch

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    Toyota Avalon (XX50) 2019-2022 Owners Manual

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