Diagnostic Aids
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 U0100:00 indicates that the PCM cannot communicate over the HS-CAN bus, this could be due to a DTC being set in the PCM or there is a circuit fault in the HS-CAN bus. Do not install a new PSCM as part of the repair for a PSCM DTC U0100:00.
Initially steering assist will remain unaffected, but once the PSCM has detected missing messages from the PCM 3 times, steering assist will be reduced to a preset level.
The PSCM will send a message to the IPC to display the POWER STEERING ASSIST FAULT message in the message center.