Room Light Control does not Operate: Procedure

1. Check the malfunction conditions.
   RESULT
   
   

   Result	Proceed to
   All conditions below	A
   Engine switch on (ACC) or on (IG) → Engine switch off	B
   All doors opened → a door closed	C
   All doors locked → a door unlocked	D

D → See step   10 

C → See step   9 

B → REPLACE MAIN BODY ECU 

A: Go to next step 

1. Check the malfunctioning dome light.
   RESULT
   
   

   Result	Proceed to
   No. 1 room light does not operate	A
   No. 3 room light does not operate	B
   Map light does not operate	C

C → See step   11 

B → See step   6 

A: Go to next step 

1. Disconnect the R7 light connector.
   Fig 1: Identifying R7 Light Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   R7-27 (+B3) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the R7 and R12 map light connectors.
   Fig 2: Identifying R7 And R12 Map Light Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the R10 light connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R7-11 (ILLB) - 7 (B)	Always	Below 1 Ω
   R12-18 (RILL) - 8 (CTY)
   R7-11 (ILLB) - Body ground	Always	10 kΩ or higher
   R12-18 (RILL) - Body ground

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the No. 1 room light with a new or normally functioning one.
   • w/ Rear Seat Entertainment System. Refer to REMOVAL - Step 4
   • w/o Rear Seat Entertainment System. Refer to REMOVAL - Step 34
2. Check the No. 1 room light operation.

   OK

   No. 1 room light operation is normal.

   RESULT
   
   

   Result	Proceed to
   OK (w/ Rear Seat Entertainment System)	A
   OK (w/o Rear Seat Entertainment System)	B
   NG	C

C → See step   11 

B → END (NO. 1 ROOM LIGHT IS DEFECTIVE) 

A → END (NO. 1 ROOM LIGHT IS DEFECTIVE) 

1. Disconnect the R7 light connector.
   Fig 3: Identifying R7 Light Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   R7-27 (+B3) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the R7 and R12 map light connectors.
   Fig 4: Identifying R7 And R12 Map Light Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the R6 light connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R7-10 (+B1) - R6-1 (DB)	Always	Below 1 Ω
   R12-14 (RRVT) - R6-3 (DL)
   R6-2 (L) - Body ground
   R7-10 (+B1) - Body ground	Always	10 kΩ or higher
   R12-14 (RRVT) - Body ground

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the No. 3 room light with a new or normally functioning one. Refer to REMOVAL - Step 38 .
2. Check the No. 3 room light operation.

   OK

   No. 3 room light operation is normal.

NG → See step   11 

OK → END (NO. 3 ROOM LIGHT IS DEFECTIVE)