Diagnostic Test

CHECK FOR AN ACTIVE DTC 

1. Turn the ignition on.
2. With the scan tool, read ABS DTCs.

   Is the DTC active?

   Yes 

   • Refer to  ANTILOCK BRAKE SYSTEM (ABS) - DIAGNOSTIC CODE INDEX  and perform the U1701-87-Lost Communication with PCM diagnostic procedure.

   No 

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