Drivetrain Control Module (DTCM)

U0100-LOST COMMUNICATION WITH ECM/PCM





For a complete wiring diagram, consult the Wiring Information.

- When Monitored:

- With the ignition on
- Battery voltage between 10 and 16 volts
- Ignition Off Draw (IOD) fuse installed
- Totally Integrated Power Module (TIPM) is configured correctly
- Set Condition:
Bus messages not received from the ECM/PCM for approximately two to five seconds.





ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.

Is the DTC Active at this time?

Yes

- Perform the U0100-Lost Communication with ECM/PCM diagnostic procedure. Totally Integrated Power Module (TIPM)

No

- Perform the Stored Lost Communication DTCs diagnostic procedure. Stored Lost Communication DTCs