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Inspection Procedure

  1. CHECK HEADLAMP DIMMER SWITCH ASSY (LIGHT CONTROL SWITCH) (See  INSPECTION  ) 
    1. NG: REPLACE HEADLAMP DIMMER SWITCH ASSY (LIGHT CONTROL SWITCH) 
    2. OK: GO TO NEXT STEP. 
  2. CHECK WIRE HARNESS (TVIP ECU <=> LIGHT CONTROL SWITCH) 
    1. Disconnect the TVIP ECU and light control switch connectors.
    2. Check the continuity between the terminals of the TVIP ECU and light control switch connectors, as shown in the illustration and table.

      Standard: 

      TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) (TVIP ECU <=> Light control switch) Specified condition
      HEAD (T3-6) <=> RF (C12-12) Continuity
      Fig 1: Identifying Wire Harness (TVIP ECU - Light Control Switch)
      G02861142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  3. CHECK WIRE HARNESS (LIGHT CONTROL SWITCH <=> BODY GROUND) 
    1. Disconnect the light control switch connector.
    2. Check the continuity between the terminal of the light control switch connector and the body ground, as shown in the illustration and table.

      Standard: 

      TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) (Light control switch <=> Body ground) Specified condition
      T (C12-10) <=> Body ground Continuity
      Fig 2: Disconnecting Light Control Switch Connector
      G02861143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
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