Toyota 4Runner manuals

Toyota 4Runner: Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) receives a door open/closed signal from each door courtesy light switch.

WIRING DIAGRAM


PROCEDURE

1.

READ VALUE USING TECHSTREAM (DOOR COURTESY LIGHT SWITCH)

(a) Using the Techstream, read the Data List (See page ).


Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

RR Door Courtesy SW

Rear door courtesy light switch RH signal / ON or OFF

ON: Rear door RH open

OFF: Rear door RH closed

-

RL Door Courtesy SW

Rear door courtesy light switch LH signal / ON or OFF

ON: Rear door LH open

OFF: Rear door LH closed

-

FR Door Courtesy SW

Front door courtesy light switch RH signal / ON or OFF

ON: Front door RH open

OFF: Front door RH closed

-

FL Door Courtesy SW

Front door courtesy light switch LH signal / ON or OFF

ON: Front door LH open

OFF: Front door LH closed

-

OK:

Normal conditions listed above are displayed.

Result

Result

Proceed to

OK

A

NG (Front door courtesy light switch does not operate)

B

NG (Rear door courtesy light switch does not operate)

C


A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


C

GO TO STEP 5


B

2.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)

(a) Remove the front door courtesy light switch assembly (See page ).



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

Text in Illustration

*a

Component without harness connected

(Front Door Courtesy Light Switch Assembly)

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - Switch body

Pin not pushed

Below 1 Ω

Pin pushed

10 kΩ or higher


NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY


OK

3.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the O5*1 or N5*2 front door courtesy light switch assembly connector.

(b) Remove the main body ECU (multiplex network body ECU) (See page ).


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

  • *1: for LH
  • *2: for RH

Standard Resistance:

for LH

Tester Connection

Condition

Specified Condition

O5-1 - 2F-27

Always

Below 1 Ω

O5-1 - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

N5-1 - 2B-15

Always

Below 1 Ω

N5-1 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

(a) Remove the driver side junction block assembly (See page ).


Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block Assembly)

-

-

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2F-27 - A-2 (FLCY)

Always

Below 1 Ω

2B-15 - A-4 (FRCY)

Always

Below 1 Ω


OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

5.

INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)

(a) Remove the rear door courtesy light switch assembly (See page ).



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

Text in Illustration

*a

Component without harness connected

(Rear Door Courtesy Light Switch Assembly)

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - Switch body

Pin not pushed

Below 1 Ω

Pin pushed

10 kΩ or higher


NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY


OK

6.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the O6*1 or N7*2 rear door courtesy light switch assembly connector.

(b) Disconnect the F8 or F10 main body ECU (multiplex network body ECU) connector.

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

  • *1: for LH
  • *2: for RH

Standard Resistance:

for LH

Tester Connection

Condition

Specified Condition

O6-1 - F8-3 (LCTY)

Always

Below 1 Ω

O6-1 - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

N7-1 - F10-27 (RCTY)

Always

Below 1 Ω

N7-1 - 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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