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 front light ECU.

WIRING DIAGRAM

A001FGKE04

PROCEDURE


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


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

      Windshield Wiper Switch:
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      F Wiper LO SW Front wiper LO switch / ON or OFF

      ON: Front wiper switch in LO

      OFF: Front wiper switch not in LO

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

      ON: Front wiper switch in HI

      OFF: Front wiper switch not in HI

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

      ON: Front wiper switch in AUTO

      OFF: Front wiper switch not in AUTO

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

      ON: Front wiper switch in MIST

      OFF: Front wiper switch not in MIST

      		 -
      F Washer SW Front washer switch / ON or OFF

      ON: Front washer switch on

      OFF: Front washer switch off

      		 -
      F Wiper VOL POS Front wiper volume (sensitivity) / 0 to 90 degrees

      0 degrees / FR wiper volume "+" position

      27 degrees / Switch is turned one notch towards the "-" side from the FR wiper volume "+" position

      63 degrees / Switch is turned one notch towards the "+" side from the FR wiper volume "-" position

      90 degrees / FR wiper volume "-" position

      		 -
      IG SW SIG Engine switch signal / ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

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

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

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


    1. A001E9CE02
      *1 Front view of wire harness connector: (to Windshield Wiper Switch)

      Disconnect the L25 switch connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      L25-1 (B) - Body ground Always 11 to 14 V
      L25-2 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      L25-2 (IG) - Body ground Engine switch off Below 1 V

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L25-8 (E) - Body ground Always Below 1 Ω

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR