Diagnostic Test
VERIFY THE DIAGNOSTIC TROUBLE CODE (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-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE?
Yes
- Refer to DTC TROUBLESHOOTING and perform the U1706-87-LOST COMMUNICATION WITH ABS (BSM) diagnostic procedure.
No
- Refer to and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.