Diagnostic Test

VERIFY DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Refer to U0147-00-LOST COMMUNICATION WITH TELEMATICS GATEWAY and perform the U0147-00 Lost Communication with Telematics Gateway diagnostic procedure.
  No
  - Refer to COMMUNICATION - DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.