Powertrain Control Module (PCM)

U0100-LOST COMMUNICATION WITH THE ECM/PCM

For a complete wiring diagram, consult the Wiring Information.

- When Monitored:
Ignition run time is greater than one second.

Battery voltage between 9 and 16 volts.

Engine run time greater than three seconds.

- Set Condition:
Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.





ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, select view 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

- Manufacturer Code Charts and perform the Stored Lost Communication DTCs diagnostic procedure.