WIPER AND WASHER SYSTEM Wiper and Washer Switch Circuit

DESCRIPTION

This circuit provides power to operate the windshield wiper switch. The manual operation signals are sent to the windshield wiper ECU.

WIRING DIAGRAM

A01ENE5E03

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (ECU-IG No. 1)


    1. Remove the ECU-IG No. 1 fuse from the cowl side junction block LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG No. 1 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. READ VALUE USING INTELLIGENT TESTER (WINDSHIELD WIPER SWITCH)


    1. Check the Data List for proper functioning of the windshield wiper switch.

      Body No. 5
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      F Wiper LO Switch Front wiper LO switch / ON or OFF

      ON: Front wiper switch in LO

      OFF: Front wiper switch not in LO

      		 -
      F Wiper HI Switch Front wiper HI switch / ON or OFF

      ON: Front wiper switch in HI

      OFF: Front wiper switch not in HI

      		 -
      F Wiper AUTO Switch Front wiper AUTO switch / ON or OFF

      ON: Front wiper switch in AUTO

      OFF: Front wiper switch not in AUTO

      		 -
      F Wiper MIST Switch Front wiper MIST switch / ON or OFF

      ON: Front wiper switch in MIST

      OFF: Front wiper switch not in MIST

      		 -
      F Washer Switch Front washer switch / ON or OFF

      ON: Front washer switch on

      OFF: Front washer switch off

      		 -
      Body No. 4
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      R Wiper LO Switch Rear wiper LO switch / ON or OFF

      ON: Rear wiper switch in LO

      OFF: Rear wiper switch no in LO

      		 -
      R Wiper Int Switch Rear wiper INT switch / ON or OFF

      ON: Rear wiper switch in INT

      OFF: Rear wiper switch no in INT

      		 -
      R Washer Switch Rear washer switch / ON or OFF

      ON: Rear washer switch on

      OFF: Rear washer switch off

      		 -
      OK
      The display is as specified in the normal condition.

    NG

    CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BATTERY AND BODY GROUND) Click here

    OK

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

  3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BATTERY AND BODY GROUND)


    1. A01EQYBE05

      Disconnect the E16 switch connector.

    2. Disconnect the E89 ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      E16-2 (+B) - E89-6 (ES) Always Below 1 Ω
      E16-10 (E) - Body ground
      E16-2 (+B) - Body ground 10 kΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      E16-3 (+B) - E89-6 (ES) Always Below 1 Ω
      E16-5 (E) - Body ground
      E16-3 (+B) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here