Lexus IS250 · Service Manual BODY ELECTRICAL

Headlight Cleaner Motor and Relay Circuit

Circuit diagnosis

DESCRIPTION

This circuit provides power to the headlight cleaner control relay.
The headlight cleaner control relay receives a signal from each switch and sends the signal to the headlight cleaner motor and pump assembly to operate it.

WIRING DIAGRAM

E119068E01

INSPECTION PROCEDURE


1. INSPECT HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY

  1. E106817
    Disconnect the connector from the headlight cleaner motor and pump assembly.

  1. Connect the positive (+) battery lead to terminal 1 of the headlight cleaner motor and pump assembly, and the negative (-) battery lead to terminal 2.

    OK:
    Operation sounds are heard.



NG
REPLACE HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY
OK


2. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER MOTOR CIRCUIT)
  1. Connect the headlight cleaner motor and pump assembly connector.

  1. Disconnect the A3 headlight cleaner control relay connector.

  1. E106814E12
    Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    Condition
    Specified Condition
    A3-3 (IG) - A3-4 (E)
    Engine switch off
    Below 1 V
    Engine switch on (IG)
    10 to 14 V
    A3-6 (PB) - A3-4 (E)
    Always
    10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - BATTERY)
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE


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