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Headlight Cleaner Switch Circuit [08/2015 - 08/2019]: Procedure

  1. INSPECT HEADLIGHT CLEANER SWITCH ASSEMBLY 
    1. Remove the headlight cleaner switch assembly (Refer to INSPECTION [08/2015 - ] ).
      GTY287415Courtesy 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
      5 - 8 Headlight cleaner switch on Below 1 Ω
      5 - 8 Headlight cleaner switch off 10 kΩ or higher

    Result: 

    NG 

    REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - HEADLIGHT CLEANER CONTROL RELAY AND MAIN BODY ECU) 
    1. Disconnect the G54 headlight cleaner switch connector.
    2. Disconnect the A32 headlight cleaner control relay connector.
    3. Remove the main body ECU (Refer to REMOVAL [08/2015 - 08/2019] ).
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G54-8 - A32-2 (H) Always Below 1 Ω
      G54-5 - A-15 (HRLY) Always Below 1 Ω
      G54-8 - Body ground Always 10 kΩ or higher
      G54-5 - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR