Diagnostic Test

CHECK FOR AN ACTIVE DTC 

1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read active DTCs.

   Is the DTC active?

   Yes 

   • Perform the Lost Communication with Cluster/CCN diagnostic procedure in the BCM. Refer to U0155-00-LOST COMMUNICATION WITH CLUSTER/CCN .

   No 

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