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

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.

• 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 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.