Inspection Procedure

HINT:

Inspect if the taillight system is normal before performing this procedure.

1. INSPECT MULTIPLEX NETWORK BODY ECU 
   1. Disconnect the B9 connector from the multiplex network body ECU.
   2. Using a service wire, connect B9-6 and B9-7 of the wire harness side and body ground.
      Fig 1: Identifying Multiplex Network Body ECU Connector Terminals

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      OK: Front fog light comes on. 

   NG: Go to step 2 

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

2. INSPECT INSTRUMENT PANEL J/B ASSEMBLY 
   1. Disconnect the 1J connector from the instrument panel junction block.
      Fig 2: Identifying 1J Connector From Instrument Panel Junction Block

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   2. Using a service wire, connect 1J-2, 1J-4 of the instrument panel junction block side and body ground.

      OK: Front fog light comes on. 

   NG: Go to step 3 

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY ECU) 

3. INSPECT INSTRUMENT PANEL J/B ASSEMBLY 
   1. Measure the voltage according to the value (s) in the table below.
      Fig 3: Identifying Instrument Panel J/B Assembly Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
      
      

      Tester connection	Condition	Specified condition
      1B-7 -Body ground	Connect 1J-2,1J-4 and body ground	10 to 14 V

   NG: REPLACE INSTRUMENT PANEL J/B ASSEMBLY 

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH FOG LIGHT CIRCUIT)