Diagnostic Test
- VERIFY THE DTC IS ACTIVE
- Turn the ignition on.
- With the scan tool, read active DTCs.
Is the DTC active at this time?
Yes
- Refer to DIAGNOSIS AND TESTING and perform the U0121-00-Lost Communication with Anti-lock Brake System (ABS) Module diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.