Diagnostic Test
VERIFY DTC IS ACTIVE
NOTE:
Make sure the battery is fully charged before proceeding.
- Turn the ignition on.
- With the scan tool, read the active DTCs.
Does the scan tool display: U0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE?
Yes
- Refer to and perform U0121-87-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE "A"-MISSING MESSAGE diagnostic procedure.
No
- Refer to and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.