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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2636 (Steering System - Electronic Power Assist Steering (EPAS)) >> Interactive Diagnostics >> DTC / Symptom Selection >> DTC Index - Power Steering Control Module (PSCM) >> DTC U0100: Lost Communication with ECM/PCM A >> Diagnostic Aids

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.