Inspection Procedure

NG: REPLACE HEADLAMP DIMMER SWITCH ASSY (LIGHT CONTROL SWITCH) 

OK: Go to next step 

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.

   Standard: 

   WIRE HARNESS (TVIP ECU <=> LIGHT CONTROL SWITCH) CONTINUITY CHECK
   
   

   Symbols (Terminal No.) (TVIP ECU <=> Light control switch)	Specified condition
   HEAD (T3-6) <=> RF (C12-12)	Continuity

   Fig 1: Identifying TVIP ECU & Light Control Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the light control switch connector.
2. Check the continuity between the terminal of the light control switch connector and the body ground.

   Standard: 

   WIRE HARNESS (LIGHT CONTROL SWITCH <=> BODY GROUND) CONTINUITY CHECK
   
   

   Symbols (Terminal No.) (Light control switch <=> Body ground)	Specified condition
   T (C12-10) <=> Body ground	Continuity

   Fig 2: Identifying Light Control Switch Connector Terminal T(10)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

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