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Inspection Procedure

  1. CHECK HEADLIGHT DIMMER SWITCH ASSEMBLY 

    NG: REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY 

    OK: GO TO NEXT STEP 

  2. CHECK HARNESS AND CONNECTOR (TVIP ECU - LIGHT CONTROL SWITCH) 
    1. Disconnect the TVIP ECU and light control switch connectors.
    2. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    TVIP ECU - LIGHT CONTROL SWITCH

    Tester Connection Specified Condition
    HEAD (T3-6) - RF (C12-12) Below 1 Ω
    Fig 1: Identifying TVIP ECU And Light Control Switch Connectors
    G05195835Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  3. CHECK HARNESS AND CONNECTOR (LIGHT CONTROL SWITCH - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    LIGHT CONTROL SWITCH - BODY GROUND

    Tester Connection Specified Condition
    T (C12-10) - Body ground Below 1 Ω
    Fig 2: Identifying Light Control Switch Connector Terminals
    G05195836Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE TVIP ECU 

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