Active Damping Control Module (ADCM)

U110A-00-LOSS OF COMMUNICATIONS WITH SCM - CAN-C

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

Theory of Operation

The Active Damping Control Module (ADCM) communicates with other controllers over the CAN C bus. The ADCM continuously monitors the bus activity and receives the messages it needs. If the ADCM does not receive messages from the SAS, then this fault will set.

- When Monitored:
Ignition on for more than 5 seconds and battery voltage between 10 and 16 volts.

- Set Condition:
The Active Damping Control Module (ADCM) no longer detects any messaging from the Steering Angle Sensor (SAS) for more than 0.5 of a second after monitoring conditions have been fulfilled.





1. VERIFY THE DTC IS ACTIVE

NOTE: If present, diagnose and repair DTC U0001-00-CAN C BUS before diagnosing this DTC.

1. Ignition on, engine not running.
2. With the scan tool, read and record ADCM DTCs.
3. With the scan tool, erase ADCM DTCs.
4. Cycle the ignition switch.
5. With the scan tool, read ADCM DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

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

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read all active DTCs from all CAN C Bus modules.

NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs related to the conditions listed above?

Yes

- Diagnose and repair the DTCs.

No

- Go To 3

3. VERIFY THAT THE SAS IS ACTIVE ON THE BUS
1. With the scan tool, select ECU View.
2. Verify that the SAS is active on the bus.

Is the SCM active on the bus?

Yes

- Go To 4

No

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

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
1. With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTCs "Logged Against" the SAS?

Yes

- Replace the Steering Column Control Module (SCCM). Steering Column Module - Removal.

No

- Replace the Active Damping Control Module (ADCM). Active Damping Control Module - Removal.
- Perform the ADCM VERIFICATION TEST. Active Damping Control Module (ADCM) Verification Test.