Speed Control

U0100-LOST COMMUNICATION WITH ECM/PCM

For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

Continuously monitored with the engine running and the ACC Module in normal mode.

- Set Condition:

The ACC Module doesn't receive a Bus Message from the ECM/PCM within 60 millisecond. The ACC module will disable the Adaptive Cruise Control (ACC) system and the ACC UNAVAILABLE message will display in the CCN. Once the DTC goes to stored, the ACC system will return to normal operation. The DTC will be cleared after the ACC Module sees 100 consecutive key cycles of the STORED DTC.





Refer to Communications for diagnostic procedures and for further possible causes.

Diagnostic Test

1.ACTIVE DTC

Ignition on, engine not running.

With a scan tool, read ACC DTCs.

Is the DTC active at this time?

Yes

- Refer to Communications for diagnostic procedures and for further possible causes.

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors, pay particulate attention the CAN circuits.
- Perform the ACC MODULE VERIFICATION TEST. Adaptive Cruise Control (ACC) Verification Test