Diagnostic Test

VERIFY THE DTC IS ACTIVE 

1. Ignition on, engine not running.
2. With the scan tool, read the DTCs.

   Is the DTC Active at this time?

   Yes 

   • Refer to the BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX - 500 & 500C and perform the appropriate diagnostic procedure.

   No 

   • Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.