PRINCIPLE OF OPERATION
For a detailed description of the interior lighting system and operation, refer to the relevant Description and Operation section.
INSPECTION AND VERIFICATION
| CAUTION | Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle. |
Note. Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage. VISUAL INSPECTION Mechanical Electrical Main interior lamp condition and installation Map reading lamp(s) condition and installation Vanity mirror lamp(s) condition and installation Glove compartment lamp condition and installation Footwell lamp(s) condition and installation Door mirror approach lamp(s) condition and installation Puddle lamp(s) condition and installation Luggage compartment lamp condition and installation Bulbs Fuses Battery Junction Box (BJB) Central Junction Box (CJB) Wiring harness Loose or corroded connector(s) Main interior lamp switch Map reading lamp switches Vanity mirror lamp switches Glove compartment lamp switch Waterfall lighting LED Luggage compartment lamp switch
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the relevant DTC Index.
SYMPTOM CHART
| Symptom | Possible Causes | Action |
|---|---|---|
| Main interior lamp inoperative | NOTE: Operate the main interior lamp switch for 3 seconds to toggle automatic mode on/off Main interior lamp toggled off Bulb(s) failure Fuse(s) blown Main interior lamp circuit short circuit to ground, open circuit, high resistance Main interior lamp switch fault | Check that the main interior lamp is not toggled off Check the bulb(s) condition Check the fuse(s) Refer to the electrical circuit diagrams and test the main interior lamp circuit for short circuit to ground, open circuit, high resistance Test the operation of the main interior lamp switch |
| Waterfall lighting LED inoperative | LED failure Fuse(s) blown LED circuit short circuit to ground, open circuit, high resistance | Check the LED condition Check the fuse(s) Refer to the electrical circuit diagrams and test the LED circuit for short circuit to ground, open circuit, high resistance |
| Map reading lamp(s) inoperative | Bulb(s) failure Fuse(s) blown Map reading lamp circuit short circuit to ground, open circuit, high resistance Map reading lamp switch fault | Check the bulb(s) condition Check the fuse(s) Refer to the electrical circuit diagrams and test the map reading lamp circuit for short circuit to ground, open circuit, high resistance Test the operation of the map reading lamp switch |
| Vanity mirror lamp(s) inoperative | Bulb failure Fuse(s) blown Vanity mirror lamp circuit short circuit to ground, open circuit, high resistance Vanity mirror lamp switch fault | Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the vanity mirror lamp circuit for short circuit to ground, open circuit, high resistance Test the operation of the vanity mirror lamp switch |
| Glove compartment lamp inoperative | Bulb failure Fuse(s) blown Glovebox lamp circuit short circuit to ground, open circuit, high resistance Glovebox lamp switch fault | Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the glovebox lamp circuit for short circuit to ground, open circuit, high resistance Test the operation of the glovebox lamp switch |
| Footwell lamp inoperative | Bulb failure Fuse(s) blown Footwell circuit short circuit to ground, open circuit, high resistance | Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the footwell circuit for short circuit to ground, open circuit, high resistance |
| Door mirror approach lamp(s) inoperative | Bulb failure Fuse(s) blown Door mirror approach lamp circuit short circuit to ground, open circuit, high resistance | Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the door mirror approach lamp circuit for short circuit to ground, open circuit, high resistance |
| Puddle lamp(s) inoperative | Bulb failure Fuse(s) blown Puddle lamp circuit short circuit to ground, open circuit, high resistance | Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the puddle lamp circuit for short circuit to ground, open circuit, high resistance |
| Luggage compartment lamp inoperative | Bulb failure Fuse(s) blown Luggage compartment lamp circuit short circuit to ground, open circuit, high resistance Luggage compartment lamp switch fault | Test the operation of the luggage compartment lamp switch Check the bulb condition Check the fuse(s) Refer to the electrical circuit diagrams and test the luggage compartment lamp circuit for short circuit to ground, open circuit, high resistance Test the operation of the luggage compartment lamp switch |
| NOTE |
|---|
| Operate the main interior lamp switch for 3 seconds to toggle automatic mode on/off |
DTC INDEX
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Central Junction Box (CJB) .
See also:
• Central Junction Box (CJB)