Toyota 4Runner manuals

Toyota 4Runner: Back Door Courtesy Switch Circuit

DESCRIPTION

The multiplex network door ECU receives a back door open/closed signal from the back door lock.

WIRING DIAGRAM


PROCEDURE

1.

READ VALUE USING TECHSTREAM (BACK DOOR COURTESY LIGHT SWITCH)

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


Back Door

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Back Door Courtesy Switch

Back door courtesy light switch signal / ON or OFF

ON: Back door open

OFF: Back door closed

-

OK:

Tester display changes according to opening and closing of back door.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)

(a) Remove the back door lock (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 - 3

Open-latch

Below 1 Ω

Full-latch

10 kΩ or higher

Text in Illustration

Full-latch

Open-latch


NG

REPLACE BACK DOOR LOCK ASSEMBLY


OK

3.

CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU)

(a) Disconnect the W8 back door lock connector.

(b) Disconnect the W10 multiplex network door ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

W8-2 (S) - W10-10 (BDCY)

Always

Below 1 Ω

W8-2 (S) - Body ground

Always

10 kΩ or higher

W8-3 (E) - W10-18 (CTYE)

Always

Below 1 Ω

W8-3 (E) - Body ground

Always

10 kΩ or higher


OK

REPLACE MULTIPLEX NETWORK DOOR ECU


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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