Lexus IS250 · Service Manual BODY

Rear Power Window Motor LH Circuit

Circuit diagnosis

DESCRIPTION

This circuit transmits signals from the multiplex network switch to the power window regulator motor.

WIRING DIAGRAM

B111211E23

INSPECTION PROCEDURE


1. INSPECT POWER WINDOW REGULATOR MOTOR

  1. B127536E02
    Remove the power window motor.

  1. Apply battery voltage to the motor connector according to the table below.

    NOTICE:
    Do not apply battery voltage to any terminals except terminals 1 and 2.

    Standard:
    Measurement Condition
    Specified Condition
    Battery positive (+) → Terminal 1 (D)
    Battery negative (-) → Terminal 2 (U)
    Motor gear rotates clockwise
    Battery positive (+) → Terminal 2 (U)
    Battery negative (-) → Terminal 1 (D)
    Motor gear rotates counterclockwise



NG
REPLACE POWER WINDOW REGULATOR MOTOR
OK


2. CHECK WIRE HARNESS (WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH)

  1. B052056E16
    Disconnect the O1 and O7connectors.

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

    Resistance:
    Tester Connection
    Condition
    Specified Condition
    O1-1 (DN) - O7-1 (D)
    Always
    Below 1 Ω
    O1-6 (UP) - O7-2 (U)
    Always
    Below 1 Ω
    O1-1 (DN) - Body ground
    Always
    10 kΩ or higher
    O1-6 (UP) - Body ground
    Always
    10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE


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