Pinpoint Test AE: DTC U0121:87: Notes
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation
- DTC U0121:87 (Lost Communication With Anti-Lock Brake System (ABS) Control Module: Missing Message) - sets continuous by the Headlamp Control Module (HCM) if data messages received from the ABS module over the High Speed Controller Area Network (HS-CAN) are missing. For a complete list of all network messages, refer to PINPOINT TESTS .
This pinpoint test is intended to diagnose the following:
- HCM
- ABS module