Room Light Circuit: Procedure

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

   Item	Test Details	Diagnostic Note
   Seat Light Operation	Seat light operation ON / OFF	-
   Shift Light Operation	Shift light operation ON / OFF	-

   OK

   Shift light illuminates.

NG → See step   2 

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

1. Disconnect the V1 junction block connector.
   Fig 1: Identifying V1 Junction Block Connector And W6 Map Light Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the W6 map light assembly connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   V1-3 (RCTY) - W6-27 (SHFT)	Below 1 Ω
   V1-2 (ILE) - W6-30 (CTY)	Below 1 Ω
   V1-3 (RCTY) or W6-27 (SHFT) - Body ground	10 kΩ or higher
   V1-2 (ILE) or W6-30 (CTY) - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Remove the DOME fuse and D/C CUT fuse from the engine room No. 1 relay block.
2. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the W6 map light assembly connector.
   Fig 2: Identifying W6 Map Light Assembly Connector

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

   Standard voltage

   Tester Connection	Specified Condition
   W6-1 (+B1) - Body ground	10 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the W6 map light assembly connector.
   Fig 3: Identifying W6 Map Light Assembly Connector

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

   Standard resistance

   Tester Connection	Specified Condition
   W6-31 (GND3) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 4: Identifying Map Light Assembly - Map Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the W6 map light assembly connector.
2. Disconnect the W11 map light connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   W6-32 (RGND) - W11-6 (RGND)	Below 1 Ω
   W6-8 (RLSW) - W11-4 (RLSW)	Below 1 Ω
   W6-25 (RRSW) - W11-1 (RRSW)	Below 1 Ω
   W6-7 (RLMP) - W11-3 (RLMP)	Below 1 Ω
   W6-24 (RRMP) - W11-2 (RRMP)	Below 1 Ω
   W6-23 (RILL) - W11-7 (RILL)	Below 1 Ω
   W6-22 (LILL) - W11-8 (LILL)	Below 1 Ω
   W6-6 (ILLB) - W11-5 (ILLB)	Below 1 Ω
   W6-32 (RGND) or W11-6 (RGND) - Body ground	10 kΩ or higher
   W6-8 (RLSW) or W11-4 (RLSW) - Body ground	10 kΩ or higher
   W6-25 (RRSW) or W11-1 (RRSW) - Body ground	10 kΩ or higher
   W6-7 (RLMP) or W11-3 (RLMP) - Body ground	10 kΩ or higher
   W6-24 (RRMP) or W11-2 (RRMP) - Body ground	10 kΩ or higher
   W6-23 (RILL) or W11-7 (RILL) - Body ground	10 kΩ or higher
   W6-22 (LILL) or W11-8 (LILL) - Body ground	10 kΩ or higher
   W6-6 (ILLB) or W11-5 (ILLB) - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Temporarily replace the map light with a new or normally functioning one.
2. Check that the light illuminates.

   OK

   Map light illuminates.

OK → END 

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