*PANEL DIMMING INOPERATIVE
For a complete wiring diagram Refer to Section 8W.
| Possible Causes |
| PANEL ILLUMINATION DTC PRESENT |
| ILLUMINATION BULB(S) |
| (L78) FUSED PARK LAMP RELAY OUTPUT CIRCUIT SHORT TO GROUND |
| (L78) FUSED PARK LAMP RELAY OUTPUT CIRCUIT OPEN |
| (E2) PANEL LAMPS DRIVER CIRCUIT SHORT TO VOLTAGE |
| ILLUMINATED COMPONENT INTERNALLY SHORTED |
| (E2) PANEL LAMPS DRIVER CIRCUIT SHORT TO GROUND |
| INSTRUMENT CLUSTER |
Diagnostic Test
1.Does the scan tool display any MIC or BCM DTCs?
Yes
- Refer to symptom list for problems related to BCM or Instrument Cluster DTCs
No
- Go To2
2.
Are all of the Instrument Cluster illumination bulbs inoperative?
Yes
- Go To3
No
- Replace the Illumination Bulb(s) as necessary in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
3.
Is the #9 Fuse in the Junction Block open?
Yes
- Using the wiring diagram/schematic as a guide, repair the Fused Park Lamp Relay Output circuit for a short to ground (between the Junction Block and the Instrument Cluster).
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To4
4.
Is the voltage above 10.5 volts?
Yes
- Go To5
No
- Repair the Junction Block in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
5.
Is the voltage above 10.5 volts?
Yes
- Go To6
No
- Repair the (L78) Fused Park Lamp Relay Output circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
6.
Is there any voltage present?
Yes
- Repair the (E2) Panel Lamps Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To7
7.
Does the Instrument Cluster illumination operate after disconnecting any component?
Yes
- Replace the illuminated component as necessary.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To8
8.
Is the resistance below 5.0 ohms?
Yes
- Repair the (E2) Panel Lamps Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace and configure the Instrument Cluster in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)