Powertrain Control Module (PCM)

U0100 LOST COMMUNICATION WITH ECM/PCM

For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams

Theory of Operation

The NGC controller communicates over the CAN C bus and continuously monitors Bus activity. If the NGC is unable to communicate, a DTC will set and the NGC will illuminate the MIL.

- When Monitored:
Every 7 msec with:

1) Engine speed greater than 500 rpm.

2) Battery voltage between 10 and 16 volts.

- Set Condition:
CAN C bus messages are not received for 10 seconds.

For communication diagnostic procedures and other possible causes refer to DTC Based Diagnostics and Non DTC Based Diagnostics.