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Wiper Switch (HI Speed) Circuit: Procedure

  1. INSPECT WINDSHIELD WIPER SWITCH (COMBINATION SWITCH) 
    1. Remove the switch. Refer to REMOVAL [09/2012 - ] .
      GTY406349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Switch Condition Specified Condition
      3 (2S) - 8 (E) Wiper switch in HI position Below 1 Ω
      3 (2S) - 8 (E) Wiper switch not in HI position 10 kΩ or higher

    NG → See step   4 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - FRONT LIGHT ECU AND BODY GROUND) 
    1. Disconnect the L25 switch connector.
      GTY352017Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A51 ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      L25-3 (2S) - A51-14 (2S) Always Below 1 Ω
      L25-8 (E) - Body ground Always Below 1 Ω
      A51-14 (2S) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   3 

  3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2012 - ]  
  4. REPLACE WINDSHIELD WIPER SWITCH. Refer to  REMOVAL [09/2012 - ]