Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Rear Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the rear door courtesy light switch assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1

for HEV Model: Click here

for Gasoline Model: Click here

  • *1: w/ Smart Key System

PROCEDURE

1.

READ VALUE USING GTS

(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

RR Door Courtesy Switch Status

Rear door courtesy light switch assembly (RH) signal

CLOSE or OPEN

CLOSE: Rear door RH closed

OPEN: Rear door RH open

-

RL Door Courtesy Switch Status

Rear door courtesy light switch assembly (LH) signal

CLOSE or OPEN

CLOSE: Rear door LH closed

OPEN: Rear door LH open

-

Body Electrical > Main Body > Data List

Tester Display

RR Door Courtesy Switch Status

RL Door Courtesy Switch Status

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

NG ("RL Door Courtesy Switch Status" is not normal)

B

NG ("RR Door Courtesy Switch Status" is not normal)

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 5

B

2.

INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH)

Click here

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

OK

3.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH) - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8F power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O31-1 - 8F-28

Always

Below 1 Ω

O31-1 - Body ground

Always

10 kΩ or higher

8F-28 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT POWER DISTRIBUTION BOX ASSEMBLY

*a

Component without harness connected

(Power Distribution Box Assembly)

-

-

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8F-28 - MB-6 (LCTY)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

5.

INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (RH)

Click here

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (RH)

OK

6.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (RH) - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8F power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O34-1 - 8F-1

Always

Below 1 Ω

O34-1 - Body ground

Always

10 kΩ or higher

8F-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT POWER DISTRIBUTION BOX ASSEMBLY

*a

Component without harness connected

(Power Distribution Box Assembly)

-

-

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8F-1 - MB-1 (RCTY)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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