Inspection Procedure

HINT:

Check if the combination meter operation is normal before performing the following procedure.

1. CHECK HEADLIGHT BEAM LEVEL CONTROL ECU 
   1. Disconnect the H12 ECU connector.
   2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      H12-11 (WNG) - Body ground	Power switch ON (IG)	10 to 14 V

      Fig 1: Checking Headlight Beam Level Control ECU

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN  PROBLEM SYMPTOMS TABLE  

   NG : GO TO NEXT STEP 

2. CHECK WIRE HARNESS (ECU - METER) 
   1. Disconnect the H12 ECU connector.
   2. Disconnect the C10 meter connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION - SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      H12-11 (WNG) - C10-10	Below 1
      H12-11 (WNG) - Body ground	10 k or higher

   NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

   Fig 2: Checking Wire Harness (ECU - Meter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK : REPLACE COMBINATION METER