Luggage Room Light Circuit: Procedure

1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the room light (luggage) illuminates.
   BODY NO. 3 (COWL SIDE JUNCTION BLOCK ECU LH)
   
   

   Item	Test Details	Diagnostic Note
   Luggage Light Control	Luggage light ON / OFF	-

   OK

   Luggage room light illuminates.

NG → See step   2 

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

1. Remove the RR-B fuse from the No. 1 junction block assembly.
2. Measure the resistance of the fuse.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Temporarily replace the room light (luggage) with a new or normally functioning one.
2. Turn the room light switch ON.
3. Check that the light illuminates.

   OK

   Room light illuminates.

OK → END 

NG: Go to next step 

1. Disconnect the V3 ECU connector.
   Fig 1: Identifying V3 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   V3-3 (LGCY) - Body ground	Room light switch ON	10 to 14 V
   V3-3 (LGCY) - Body ground	Room light switch OFF	0 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Inspection. Refer to INSPECTION

OK

Luggage door closer (luggage door courtesy switch) is normal.

NG → REPLACE LUGGAGE DOOR CLOSER 

OK: Go to next step 

1. Disconnect the V3 ECU connector.
   Fig 2: Identifying V3 ECU Connector And Y5 Closer Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the Y5 closer connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   V3-8 (CCTY) - Y5-4 (CTY)	Below 1 Ω
   V3-8 (CCTY) or Y5-4 (CTY) - Body ground	10 kΩ or higher
   Y5-3 (E) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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