Toyota 4Runner manuals

Toyota 4Runner: Door Courtesy Switch Circuit

DESCRIPTION

The side auto step controller ECU assembly receives the door open/closed signal from each door courtesy light switch via the side auto step switch assembly.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

HINT:

Inspection should be performed on the door courtesy switch circuit on the side where the automatic running board is malfunctioning.

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 closed

OFF: Front door RH open

-

FL Door Courtesy SW

Front door courtesy light switch LH signal / ON or OFF

ON: Front door LH closed

OFF: Front door LH open

-

OK:

Normal conditions listed above are displayed.


NG

LIGHTING SYSTEM


OK

2.

CHECK HARNESS AND CONNECTOR (DOOR COURTESY LIGHT SWITCH - DIODE)

(a) for LH

(1) Disconnect the O5 and O6 door courtesy light switch connectors.

(2) Disconnect the O26 diode connector.

(b) for RH

(1) Disconnect the N5 and N7 door courtesy light switch connectors.

(2) Disconnect the N24 diode connector.

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

Standard Resistance (Check for Open):

for LH

Tester Connection

Condition

Specified Condition

O5-1 - O26-1

Always

Below 1 Ω

O6-1 - O26-3

Always

Below 1 Ω

for RH

Tester Connection

Condition

Specified Condition

N5-1 - N24-1

Always

Below 1 Ω

N7-1 - N24-3

Always

Below 1 Ω

Standard Resistance (Check for Short):

for LH

Tester Connection

Condition

Specified Condition

O5-1 - Body ground

Always

10 kΩ or higher

O6-1 - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

N5-1 - Body ground

Always

10 kΩ or higher

N7-1 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (DIODE - SIDE AUTO STEP SWITCH)

(a) Disconnect the F90 side auto step switch assembly connector.

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

Standard Resistance (Check for Open):

for LH

Tester Connection

Condition

Specified Condition

O26-2 - F90-3 (CTY1)

Always

Below 1 Ω

for RH

Tester Connection

Condition

Specified Condition

N24-2 - F90-5 (CTY2)

Always

Below 1 Ω

Standard Resistance (Check for Short):

for LH

Tester Connection

Condition

Specified Condition

O26-2 - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

N24-2 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

REPLACE DIODE

(a) Replace the diode on the malfunctioning side with a new or correctly functioning diode.


NEXT

5.

CHECK AUTOMATIC RUNNING BOARD OPERATION

(a) Check that the automatic running board functions normally (See page ).


OK:

Malfunction disappears.


OK

END


NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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