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Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - WINDSHIELD WIPER SWITCH ASSEMBLY) 
    1. Disconnect the J74 ECU connector
    2. Disconnect the J26 windshield wiper switch assembly connector
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      J74-23 (HEAD) - J26-4 (HEAD) Always Below 1 Ω
      J74-23 (HEAD) - Body ground Always 10 kΩ or higher
      4. Fig 1: Identifying J74 ECU And J26 Windshield Wiper Switch Assembly Connector
      G05756465Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next Step 

  2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the J26 windshield wiper switch assembly connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      J26-5 (E) - Body ground Always Below 1 Ω
      3. Fig 2: Identifying J26 Windshield Wiper Switch Assembly Connector
      G05756466Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

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