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

The PSCM will monitor the HS-CAN bus when the ignition has been on for more than 5 seconds, when the voltage to the PSCM is greater than 9 volts and when there are no DTCs present that are inhibiting PSCM operation.

• DTC U0100:00 (Lost Communication with ECM/PCM A: No Sub Type Information) - This DTC sets if communications between the PSCM and the PCM fail. If the engine speed/vehicle speed message is missing for more that 40 ms or the battery management message is missing for more than 200 ms, this DTC sets.