Inspection Procedure

1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the stop light illuminates.

   Body No. 4 

   BODY NO. 4 ACTIVE TEST REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Stop Light	Stop light operation	OFF / ON	-

   OK: stop light illuminates. 

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

NG: Go to Next Step 

1. Remove the rear combination light.
2. Apply battery voltage to the rear combination light connector and check that the stop light illuminates.

   OK 

   STOP LIGHT ILLUMINATION CONDITION
   
   

   Measurement Condition	Specified Condition
   Battery positive (+) → Terminal 3 Battery positive (-) → Terminal 4	Stop light illuminates

   Fig 1: Identifying Rear Combination Light Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR COMBINATION LIGHT ASSEMBLY 

OK: Go to Next Step 

1. Disconnect the 6L junction block connector.
2. Measure the voltage of the wire harness side connectors.

   Standard voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   6L-1 (STOP1) - Body ground	10 to 14 V

   Fig 2: Identifying 6L Junction Block Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to Next Step 

1. Disconnect the R6*1 or R7*2 light connector.

   HINT:

   *1: LH

   *2: RH

2. Disconnect the L23 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance: 

   LH 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   R6-3 - L23-8 (STP1)	Below 1 Ω
   R6-4 - Body ground	Below 1 Ω
   R6-3 - Body ground	10 kΩ or higher

   RH 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   R7-3-L23-7 (STP1)	Below 1 Ω
   R7-4 - Body ground	Below 1 Ω
   R7-3 - Body ground	10 kΩ or higher

   Fig 3: Checking Wire Harness (Light - ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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