B1612

B1612-PANEL ILLUMINATION CONTROL CIRCUIT





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the ignition on and the Panel Illumination active.

- Set Condition:
Panel Illumination Status HIGH.





Diagnostic Test

1. CHECK FOR AN ACTIVE DTC
Turn the ignition on.
With the scan tool, record and erase DTCs.
Activate the Panel Illumination.
Wait 30 seconds.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK THE CLOCK MODULE FOR A SHORT TO GROUND




Disconnect the Clock Module harness connector.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Clock Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. CHECK THE A/C HEATER CONTROL FOR A SHORT TO GROUND




Disconnect the A/C Heater Control harness connector.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 4

No

- Replace the A/C Control.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK THE PRNDL LAMP FOR A SHORT TO GROUND




Disconnect the PRNDL Lamp harness connector.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 5

No

- Replace the PRNDL Lamp.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. CHECK THE FRONT WINDOW SWITCH FOR A SHORT TO GROUND




Disconnect the Front Window Switch harness connector.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To 6

No

- Replace the Front Window Switch.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

6. CHECK THE (E12) PANEL LAMPS DRIVER CIRCUIT FOR A SHORT TO GROUND




Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
With all the above components disconnected, measure the resistance to ground of the (E12) Panel Lamps Driver Circuit from the Instrument Cluster C1 harness connector.
Is the resistance less than 10K ohms?

Yes

- Repair the (E12) Panel Lamps Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 7

7. CHECK THE (E12) PANEL LAMPS DRIVER CIRCUIT FOR AN OPEN




With all the above components disconnected, measure the resistance of the (E12) Panel Lamps Driver Circuit between the Instrument Cluster C1 harness connector and the Window Switch harness connector.
Is the resistance greater than 10K ohms?

Yes

- Repair the (E12) Panel Lamps Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 8

8. CHECK THE (E12) PANEL LAMPS DRIVER CIRCUIT FOR A SHORT TO VOLTAGE




Turn the ignition on.
With all the above components disconnected, measure the voltage of the (E12) Panel Lamps Driver Circuit from the Instrument Cluster C1 harness connector.
Is the voltage above 5.0 volts?

Yes

- Repair the (E12) Panel Lamps Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Instrument Cluster.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test