Toyota 4Runner manuals

Toyota 4Runner: Hall Effect Sensor LH (43,44)

DESCRIPTION

When the automatic running board is operating and the current in the side auto step motor is within standard parameters, the side auto step controller ECU assembly halts the operation of the automatic running board if it does not receive a side auto step motor hall sensor signal.

DTC No.

Detection Condition

Trouble Area

43

The side auto step motor LH current is normal and there is no side auto step motor assembly LH hall sensor signal.

  • Wire harness or connector
  • Side auto step motor assembly

44

The side auto step motor RH current is normal and there is no side auto step motor assembly RH hall sensor signal.

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.

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

Standard Resistance:

for LH

Tester Connection

Condition

Specified Condition

O25-1 (-1) - A41-5 (SSR-)

Always

Below 1 Ω

O25-2 (SSR1) - A41-10 (SSR1)

Always

Below 1 Ω

O25-3 (+1) - A41-14 (SSR+)

Always

Below 1 Ω

A41-10 (SSR1) - Body ground

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

N23-1 (-2) - A41-5 (SSR-)

Always

Below 1 Ω

N23-2 (SSR2) - A41-9 (SSR2)

Always

Below 1 Ω

N23-3 (+2) - A41-14 (SSR+)

Always

Below 1 Ω

A41-9 (SSR2) - Body ground

Always

10 kΩ or higher


OK

REPLACE SIDE AUTO STEP MOTOR ASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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