WIPER AND WASHER SYSTEM Wiper and Washer Switch Circuit

DESCRIPTION

This circuit detects the state of the windshield wiper switch assembly (front wiper switch and front washer switch) and sends it to the windshield wiper relay assembly.

WIRING DIAGRAM

A005BKWE17

PROCEDURE


  1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY


    1. A005CMXE02
      Text in Illustration
      *1 Windshield Wiper Switch Assembly (Adjusting Ring Position)
      *a

      Component without harness connected

      (Windshield Wiper Switch Assembly)

      Remove the windshield wiper switch assembly Click here.

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

      Standard Resistance
      Front Wiper Switch
      Tester Connection Switch Condition Specified Condition
      L48-3 (+1) - L48-1 (+S) OFF Below 1 Ω
      AUTO
      L48-3 (+1) - L48-2 (+B) MIST
      LO
      L48-2 (+B) - L48-4 (+2) HI
      L48-9 (AUTO) - L48-10 (E) AUTO
      Front Washer Switch
      Tester Connection Switch Condition Specified Condition
      L49-2 (EW) - L49-3 (WF) ON Below 1 Ω
      OFF 10 kΩ or higher
      Adjusting Ring*
      Tester Connection Switch Condition Specified Condition
      L48-7 (VR1) - L48-8 (VR2) P1 209 to 231 Ω
      P2 114 to 126 Ω
      P3 58.9 to 65.1 Ω
      P4 Below 1 Ω

      Tech Tips

      *: The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting ring.


    NG

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY AND BODY GROUND)


    1. Disconnect the L146 windshield wiper relay assembly connector and A35 windshield wiper motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L48-2 (+B) - L146-2 (IG) Always Below 1 Ω
      L48-2 (+B) - Body ground Always 10 kΩ or higher
      L48-3 (+1) - A35-1 (+1)*1 Always Below 1 Ω
      L48-3 (+1) - A35-3 (+1)*2 Always Below 1 Ω
      L48-3 (+1) - Body ground Always 10 kΩ or higher
      L48-4 (+2) - L146-11 (+2) Always Below 1 Ω
      L48-4 (+2) - A35-4 (+2)*1 Always Below 1 Ω
      L48-4 (+2) - A35-5 (+2)*2 Always Below 1 Ω
      L48-4 (+2) - Body ground Always 10 kΩ or higher
      L48-1 (+S) - L146-10 (+1) Always Below 1 Ω
      L48-1 (+S) - Body ground Always 10 kΩ or higher
      L48-9 (AUTO) - L146-3 (C1) Always Below 1 Ω
      L48-9 (AUTO) - Body ground Always 10 kΩ or higher
      L48-10 (E) - L146-5 (CO) Always Below 1 Ω
      L48-10 (E) - Body ground Always 10 kΩ or higher
      L48-7 (VR1) - L146-21 (VR1) Always Below 1 Ω
      L48-7 (VR1) - Body ground Always 10 kΩ or higher
      L48-8 (VR2) - L146-8 (VR2) Always Below 1 Ω
      L48-8 (VR2) - Body ground Always 10 kΩ or higher
      L49-3 (WF) - L146-25 (W) Always Below 1 Ω
      L49-3 (WF) - Body ground Always 10 kΩ or higher
      L49-2 (EW) - Body ground Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD


    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR