Pinpoint Test AC: DTC U0100:87: Notes
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- DTC U0100:87 (Lost Communication With ECM/PCM "A": Missing Message) - sets continuous in the Headlamp Control Module (HCM) if data messages received from the PCM over the High Speed Controller Area Network (HS-CAN) are missing. For a complete list of all network messages, refer to MODULE COMMUNICATIONS NETWORK -- FUSION, MILAN & MKZ article.
This pinpoint test is intended to diagnose the following:
- HCM
- PCM