Interior Lights Dimming Diagnostic System Check
Step
| Action
| Normal Result(s)
| Abnormal Result(s)*
|
1
|
- Install the scan tool.
- Turn the ignition switch to the ON position.
- Select BCM DTC with the scan tool.
- Check for any stored DTCs which may have an effect on serial data
line communication.
- Turn ignition switch OFF.
- Remove the scan tool.
| No DTCs
are stored in memory.
| DTC is stored in memory. Go to applicable DTC table.
|
2
|
- Turn the ignition switch to the ON position.
- Turn the I/P dimmer switch to the HIGH position.
- Turn the headlamp switch to the PARK position.
| The following
illumination lamps turn on inside the passenger compartment:
| • | HVAC control head faceplate. |
| • | Fog lamp/rear compartment lid release switch (domestic) / fog
lamp switch. |
| • | Electronic traction control and Ride Control (if equipped) switch
faceplate. |
| • | MEMORY, MIRRORS, DOORLOCK, and WINDOW switch faceplate. |
| • | Inside rearview mirror LED. |
|
| • | Fog Lamp Switch Illumination is Inoperative. |
| • | Lamp Inoperative-One Instrument Panel (PRNDL Illumination Inop). |
| • | Lamp Inoperative-One Instrument Panel (HVAC Illumination Inop). |
| • | Lamp Inoperative-One Instrument Panel (TCS Illumination Inop). |
|
3
|
- Turn the I/P dimmer switch slowly to the LOW position.
- Return the I/P dimmer switch to the HIGH position.
|
- The brightness of the I/P, radio, HVAC, doors, and PRNDL lamps
slowly decrease.
- The brightness of the I/P, radio, HVAC, doors, and PRNDL lamps
slowly increase.
| Lamps Erratic
with Dimmer Switch-Incandescent.
|
4
| Turn the headlamp switch to the OFF position.
| The I/P lamps, HVAC, and
radio illumination lamps turn OFF.
|
| • | Lamps Inoperative-One Instrument Panel (HVAC Illumination Always
ON). |
| • | Lamps Inoperative-One Instrument Panel (PRNDL Illumination Always
On). |
|
* Refer to the appropriate symptom diagnostic table for
the applicable abnormal result.
|
