Diagnostic Test

Turn the ignition on.

With the scan tool, record and erase DTCs.

Wait 30 seconds.

With the scan tool, read DTCs.

Does the scan tool display: B1609-PANEL DIMMER INPUT CIRCUIT/PERFORMANCE? 

Yes 

1. Go To  2.

No 

1. 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 chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
2. Perform BODY VERIFICATION TEST .

The Panel Dimmer Signal is a LIN Bus message from the SCM.

If this DTC is set, view repair. 

Repair 

1. Replace the SCM in accordance with the service information.
2. Perform BODY VERIFICATION TEST .