Toyota 4Runner: Short in Motor LH (11,12)

Toyota 4Runner Service Manual / Vehicle Exterior / Exterior Panels / Trim / Automatic Running Board System / Short in Motor LH (11,12)

DESCRIPTION

When there is a short in the side auto step motor circuit, the side auto step controller ECU assembly halts the operation of the automatic running board.

DTC No.	Detection Condition	Trouble Area
11	More than 44 A of current is flowing through the side auto step motor LH.	Wire harness or connector Side auto step motor assembly
12	More than 44 A of current is flowing through the side auto step motor RH.	Wire harness or connector Side auto step motor assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (SIDE AUTO STEP MOTOR - SIDE AUTO STEP CONTROLLER ECU)

(a) Disconnect the O25*1 or N23*2 side auto step motor assembly connector.

*1: for LH
*2: for RH

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

Standard Resistance:

for LH

Tester Connection	Condition	Specified Condition
A42-3 (STW1) - A42-4 (DPL1)	Always	10 kΩ or higher

for RH

Tester Connection	Condition	Specified Condition
A42-2 (STW2) - A42-1 (DPL2)	Always	10 kΩ or higher

REPLACE SIDE AUTO STEP MOTOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Open in Motor LH Circuit (22,24)

DESCRIPTION When there is an open in the side auto step motor circuit, the side auto step controller ECU assembly does not operate the automatic running board. DTC No. Detect ...

Short to GND in Motor LH Circuit (21,23)

DESCRIPTION When there is a short to GND in the side auto step motor circuit, the side auto step controller ECU assembly does not operate the automatic running board. DTC No. ...

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