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

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

OK:

Normal conditions listed above are displayed.

NG

LIGHTING SYSTEM

OK

(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

for RH

Standard Resistance (Check for Short):

for LH

for RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(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

for RH

Standard Resistance (Check for Short):

for LH

for RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

NEXT

(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