Courtesy Lamp: Testing and Inspection
Interior Room Lamp Circuit Check [without Power Door Locks]
Diagnosis Procedure
Regarding Wiring Diagram information, refer to [Interior Room Lamp: Wiring Diagram [without Power Door Locks] Interior Room Lamp [without Power Door Locks] ].
CAUTION:
Before performing the diagnosis, check that the following is normal.
- Fuse
- Interior room lamp bulbs
1. CHECK INTERIOR ROOM LAMP POWER SUPPLY
Check voltage between room lamp 2nd row connector R10 terminal 2 and ground.
Is the inspection result normal?
YES
GO TO 2
NO
Repair the harness or connectors.
2. CHECK INTERIOR ROOM LAMP GROUND
1 Turn ignition switch OFF.
2 Disconnect BCM connectors M18, M19 and room lamp 2nd row connector.
3 Check continuity between room lamp 2nd row connector R10 terminal 1 and ground while opening/closing the door.
Is the inspection result normal?
YES
Replace the interior room lamp. Refer to [Interior Room Lamp: Removal and Installation] Service and Repair.
NO
GO TO 3
3. CHECK DOOR SWITCHES
Check the door switches. Refer to "Component Inspection (Door Switch)".
Is the inspection result normal?
YES
- Crew cab models, repair the harness or connectors between the interior room lamp and the door switches.
- King cab models, GO TO 4
NO
Replace the door switch.
4. CHECK DOOR SWITCH GROUND (King Cab)
Check continuity between door switch connectors and ground.
Is the inspection result normal?
YES
Repair the harness or connectors between the interior room lamp and the door switches.
NO
Repair the harness or connectors between the door switch and ground.
Component Inspection (Door Switch)
Crew Cab
1. CHECK DOOR SWITCHES
1 Disconnect door switch.
2 Check continuity between door switch terminal 1 and ground.
Is the inspection result normal?
YES
Inspection End
NO
Replace door switch.
King Cab
1. CHECK DOOR SWITCHES
1 Disconnect door switch.
2 Check continuity between door switch terminals 1 and 3.
Is the inspection result normal?
YES
Inspection End
NO
Replace door switch.