WIPER AND WASHER SYSTEM(w/ Rain Sensor) Headlight Signal Circuit

DESCRIPTION

The headlight cleaner control relay detects the status of the low beam headlights.

WIRING DIAGRAM

A01QQKEE01
*a from Battery
*b Headlight Cleaner Control Relay
*c to Headlight Unit
*d to Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note

First check that the low beam headlights operate normally.

PROCEDURE


  1. CHECK HEADLIGHT CLEANER CONTROL RELAY


    1. A01QOCKC01
      *a

      Front view of wire harness connector

      (to Headlight Relay)

      Remove the headlight relay from the No. 1 engine room relay block and junction block assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Headlight relay terminal 2 - Body ground Light control switch in head position Below 1 V
      Light control switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY [H-LP] - HEADLIGHT CLEANER CONTROL RELAY)


    1. Remove the headlight relay from the No. 1 engine room relay block and junction block assembly.

    2. Disconnect the A48 headlight cleaner control relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Headlight relay terminal 2 - A48-1 (HDLO) Always Below 1 Ω
      Headlight relay terminal 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT CLEANER CONTROL RELAY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR