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Home >> Ford >> 2014 >> Fiesta ST >> Repair and Diagnosis >> External Pages >> Different car >> Section 332 (Electronic Power Assist Steering Component Testing) >> DTC Symptom Index >> DTC Index >> PSCM - Power Steering Control Module >> DTC U0100: Lost Communication with ECM/PCM A >> Description

DTC U0100: Lost Communication with ECM/PCM A: Description

WARNING: This page is about a different car, the 2015 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.

The PSCM monitors the HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage to the PSCM is greater than 10 volts and there are no DTCs present inhibiting PSCM operation.

The PCM sends the vehicle speed and engine speed messages to the PSCM. If the messages are missing for more than 5 seconds and the PSCM has not set DTC U0001:88, the PSCM sets DTC U0100:00.

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