Inspection Procedure

1. Select the ACTIVE TEST, use the intelligent tester (with CAN VIM) to generate a control command, and then check that the center stop light illuminates.

   Luggage room junction block ECU 

   ACTIVE TEST DETAIL - LUGGAGE ROOM JUNCTION BLOCK ECU
   
   

   Item	Test Details	Diagnostic Note
   H-M STOP LIGHT	High mounted stop light ON / OFF	-

   OK: Center stop light illuminates. 

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

NG: Go to Next step 

1. Remove the center stop light.
2. Apply battery voltage to the center stop light connector and check that the center stop light illuminates.
   Fig 1: Identifying Center Stop Light Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK 

   MEASUREMENT CONDITION AND SPECIFIED CONDITION
   
   

   Measurement Condition	Specified Condition
   Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2	Center stop light illuminates.

NG: REPLACE CENTER STOP LIGHT ASSEMBLY 

OK: Go to Next step 

Fig 2: Identifying Center Stop Light And Luggage Room Junction Block ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H18 light connector.
2. Disconnect the L23 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   H18-1 - L23-6 (STP3)	Below 1 Ω
   H18-2 - Body ground	Below 1 Ω
   H18-1 - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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