Toyota 4Runner Quiz
Vehicle Exterior

Short to Battery in Motor RH Circuit (25,26)

In this manual: Vehicle Exterior
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DESCRIPTION

When there is a short to battery in the side auto step motor circuit, the side auto step controller ECU assembly will not operate the automatic running board.

DTC No.

Detection Condition

Trouble Area

25

Short to battery in the stowing or deploying side of the side auto step motor LH circuit when the automatic running board is not in operation.
  • Wire harness or connector
  • Side auto step controller ECU assembly

26

Short to battery in the stowing or deploying side of the side auto step motor RH circuit when the automatic running board is not in operation.
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.

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

Standard Voltage:

for LH

Tester Connection

Condition

Specified Condition

A42-3 (STW1) - Body ground

When the automatic running board LH is not in operation.

Below 1 V

A42-4 (DPL1) - Body ground

When the automatic running board LH is not in operation.

Below 1 V

for RH

Tester Connection

Condition

Specified Condition

A42-2 (STW2) - Body ground

When the automatic running board RH is not in operation.

Below 1 V

A42-1 (DPL2) - Body ground

When the automatic running board RH is not in operation.

Below 1 V

OK

REPLACE SIDE AUTO STEP CONTROLLER ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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