Toyota 4Runner manuals

Toyota 4Runner: 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.

Detection Condition

Trouble Area

22

Open in the stowing or deploying side of the side auto step motor LH circuit.

  • Side auto step motor assembly
  • Wire harness or connector

24

Open in the stowing or deploying side of the side auto step motor RH circuit.

NOTICE:

This DTC is stored when the door is opened or closed, or the Active Test "Power Running Board Forced Retracting" is performed while the connector is disconnected from the 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.

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

Standard Resistance:

for LH

Tester Connection

Condition

Specified Condition

O25-4 (STW1) - A42-3 (STW1)

Always

Below 5 Ω

O25-5 (DPL1) - A42-4 (DPL1)

Always

Below 5 Ω

for RH

Tester Connection

Condition

Specified Condition

N23-4 (STW2) - A42-2 (STW2)

Always

Below 5 Ω

N23-5 (DPL2) - A42-1 (DPL1)

Always

Below 5 Ω


OK

REPLACE SIDE AUTO STEP MOTOR ASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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