Toyota 4Runner: Short to Battery in Hall Effect Sensor Power Circuit (32)

Toyota 4Runner Service Manual / Vehicle Exterior / Exterior Panels / Trim / Automatic Running Board System / Short to Battery in Hall Effect Sensor Power Circuit (32)

DESCRIPTION

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

DTC No.	Detection Condition	Trouble Area
32	The side auto step motor hall sensor voltage is more than 4 V when the automatic running board is not in operation.	Wire harness or connector Side auto step motor assembly Side auto step controller ECU assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (SIDE AUTO STEP MOTOR POWER SOURCE)

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

*1: for LH
*2: for RH

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

Standard Voltage:

for LH

Tester Connection	Condition	Specified Condition
O25-3 (+1) - Body Ground	When the automatic running board LH is not in operation.	Below 4 V

for RH

Tester Connection	Condition	Specified Condition
N23-3 (+2) - Body Ground	When the automatic running board RH is not in operation.	Below 4 V

Text in Illustration

for LH

for RH

Front view of wire harness connector

(to Side Auto Step Motor Assembly)

REPLACE SIDE AUTO STEP MOTOR ASSEMBLY

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

(a) Disconnect the A41 side auto step controller ECU assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A41-14 (SSR+) - Body Ground	Always	Below 4 V

REPLACE SIDE AUTO STEP CONTROLLER ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Hall Effect Sensor LH Pulse (41,42)

DESCRIPTION When there is noise present in the side auto step motor hall pulse signal, the side auto step controller ECU assembly halts the operation of the automatic running board. D ...

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

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. ...

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