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  DIAGNOSTIC CODE INDEX, BCM  and perform the appropriate diagnostic procedure.

   No 

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