Toyota 4Runner manuals

Toyota 4Runner: Side Auto Step 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.

CHECK HARNESS AND CONNECTOR (SIDE AUTO STEP SWITCH - SIDE AUTO STEP CONTROLLER ECU)

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

(b) Disconnect the A42 side auto step controller ECU assembly 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

F90-4 (ECU1) - A42-14 (CTY1)

Always

Below 1 Ω

for RH

Tester Connection

Condition

Specified Condition

F90-6 (ECU2) - A42-13 (CTY2)

Always

Below 1 Ω

Standard Resistance (Check for Short):

for LH

Tester Connection

Condition

Specified Condition

A42-14 (CTY1) - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

A42-13 (CTY2) - Body ground

Always

10 kΩ or higher


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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