Diagnostic Test

CHECK IF THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Refer to DIAGNOSIS AND TESTING and perform the U0019-87-Can B Bus - No Signal diagnostic procedure.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.