Toyota 4Runner: Hall Effect Sensor LH Pulse (41,42)

Toyota 4Runner Service Manual / Vehicle Exterior / Exterior Panels / Trim / Automatic Running Board System / 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.

DTC No.	Detection Condition	Trouble Area
41	The side auto step motor assembly LH hall sensor pulse signal is less than 1.5 ms 3 times in succession.	Wire harness or connector Side auto step motor assembly
42	The side auto step motor assembly RH hall sensor pulse signal is less than 1.5 ms 3 times in succession.	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 A41 side auto step controller ECU assembly connector.

Standard Resistance:

for LH

Tester Connection	Condition	Specified Condition
O25-2 (SSR1) - A41-10 (SSR1)	Always	Below 1 Ω
A41-10 (SSR1) - Body ground	Always	10 kΩ or higher

for RH

Tester Connection	Condition	Specified Condition
N23-2 (SSR2) - A41-9 (SSR2)	Always	Below 1 Ω
A41-9 (SSR2) - Body ground	Always	10 kΩ or higher

REPLACE SIDE AUTO STEP MOTOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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