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

The PSCM monitors the HS-CAN bus when the ignition has been on for more than 5 seconds, when the voltage to the PSCM is greater than 10 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. The PCM sends the vehicle speed/engine speed message to the PSCM. If the message is missing for more than 5 seconds and the PSCM has not set DTC U0001:88, the PSCM sets DTC U0100:00.