Diagnostic Test
VERIFY THE DTC IS ACTIVE
- Turn the ignition on.
- With the scan tool, read DTCs and record on vehicle work order.
Is the DTC active at this time?
Yes
- Refer to U0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE and perform the U0121-00-Lost Communication with Anti-lock Brake System (ABS) Module diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.