Room Light Control Does Not Operate

LIGHTING (EXT): LIGHTING SYSTEM: Room Light Control does not Operate

Room Light Control does not Operate

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no LIN communication malfunctions before troubleshooting this symptom.

PROCEDURE

1. CHECK CONDITION
(a) Check the malfunction conditions.

Result





D -- GO TO POWER DOOR LOCK CONTROL SYSTEM
C -- GO TO COURTESY LIGHT SWITCH
B -- REPLACE MAIN BODY ECU
A -- Continue to next step.
2. CONFIRM LIGHT POSITION
(a) Check the malfunctioning dome light.

Result





C -- REPLACE MAP LIGHT
B -- CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY)
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY)




(a) Disconnect the R7 light connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (MAP LIGHT - NO. 1 ROOM LIGHT)




(a) Disconnect the R7 and R12 map light connectors.
(b) Disconnect the R10 light connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK NO. 1 ROOM LIGHT (OPERATION)
(a) Temporarily replace the No. 1 room light with a new or normally functioning one.
- W/ Rear Seat Entertainment System Removal
- W/O Rear Seat Entertainment System Removal
(b) Check the No. 1 room light operation.
OK:
No. 1 room light operation is normal.

Result





C -- REPLACE MAP LIGHT
B -- END (NO. 1 ROOM LIGHT IS DEFECTIVE)
A -- END (NO. 1 ROOM LIGHT IS DEFECTIVE)
6. CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY)




(a) Disconnect the R7 light connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (NO. 3 ROOM LIGHT - MAP LIGHT AND BODY GROUND)
(a) Disconnect the R7 and R12 map light connectors.




(b) Disconnect the R6 light connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK NO. 3 ROOM LIGHT (OPERATION)
(a) Temporarily replace the No. 3 room light with a new or normally functioning one Removal.
(b) Check the No. 3 room light operation.
OK:
No. 3 room light operation is normal.
NG -- REPLACE MAP LIGHT
OK -- END (NO. 3 ROOM LIGHT IS DEFECTIVE)