U0100

U0100-LOST COMMUNICATION WITH ECM/PCM

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

- When Monitored:
Continuously when the ignition is on.

The battery voltage between 10 and 16 Volts.

Body Control Module (BCM) is configured correctly.

- Set Condition:
Bus messages not received from the Powertrain Control Module (PCM) for approximately two to five seconds.





VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the battery is fully charged before proceeding.

1. Turn the ignition on.
2. With the scan tool, read the active DTCs.

Does the scan tool display: U0100-LOST COMMUNICATION WITH ECM/PCM?

Yes

- Perform the U1701-87-Lost Communication with PCM diagnostic procedure U1701-87.

No

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