Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the door control switch assembly. 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.*

  • for HEV Model: Click here
  • for Gasoline Model: Click here
    • *: w/ Start Key System

PROCEDURE

1.

READ VALUE USING GTS (Manual Door Lock Switch (D/P Door), Manual Door Unlock Switch (D/P 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

Manual Door Lock Switch (D/P Door)

Front passenger door control switch lock signal

OFF or ON

OFF: Lock side of front passenger door control switch not pushed

ON: Lock side of front passenger door control switch pushed

-

Manual Door Unlock Switch (D/P Door)

Front passenger door control switch unlock signal

OFF or ON

OFF: Unlock side of front passenger door control switch not pushed

ON: Unlock side of front passenger door control switch pushed

-

Body Electrical > Main Body > Data List

Tester Display

Manual Door Lock Switch (D/P Door)

Manual Door Unlock Switch (D/P Door)

OK:

The GTS indicates ON or OFF according to the switch operation shown in the table.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

2.

INSPECT DOOR CONTROL SWITCH ASSEMBLY

Click here

NG

REPLACE DOOR CONTROL SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the K20 door control switch assembly connector.

(b) Disconnect the I86 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K20-4 (L) - I86-6 (L1)

Always

Below 1 Ω

K20-2 (UL) - I86-7 (UL1)

Always

Below 1 Ω

K20-5 (E) - Body ground

Always

Below 1 Ω

K20-4 (L) - Body ground

Always

10 kΩ or higher

I86-6 (L1) - Body ground

Always

10 kΩ or higher

K20-2 (UL) - Body ground

Always

10 kΩ or higher

I86-7 (UL1) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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