U110A-00

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

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

Theory of Operation

The Adaptive Cruise Control (ACC) communicates with other controllers over the CAN C bus. The ACC continuously monitors the bus activity and receives the messages it needs. If the ACC does not receive messages from the SAS, then this fault will set. The ACC module will disable the ACC system and the ACC UNAVAILABLE message will display in the Cabin Compartment Node (CCN). Once the Diagnostic Trouble Code (DTC) goes to stored, the ACC system will return to normal operation. The DTC will be cleared after a 100 consecutive key cycles of the STORED DTC.

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

- Set Condition:
The Adaptive Cruise Control (ACC) module 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 DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Diagnose all communication DTCs before continuing.

1. Ignition on, engine not running.
2. Using a scan tool, read ACC DTCs.

Is the DTC active at this time?

Yes

- Go To 2

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 ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Adaptive Cruise Control (ACC) Verification Test.

2. VERIFY SCCM (SAS) IS ACTIVE ON CAN C BUS
1. Using a scan tool, select ECU View.
2. Verify that the SCCM (SAS) active on the bus.

Is the SCCM (SAS) active on the bus?

Yes

- Go To 3

No

- and perform the U0212-LOST COMMUNICATION WITH SCM diagnostic procedure U0212.

3. CHECK FOR ACTIVE OR STORED DTCs IN SCCM (SAS)
1. Using a scan tool, read SCCM (SAS) DTCs.

Are any DTCs active or stored in the SCCM (SAS)?

Yes

- Testing and Inspection and perform the appropriate diagnostic procedure.

No

- Go To 4

4. CHECK FOR ACTIVE OR STORED COMMUNICATION DTCs IN TIPM
1. Using a scan tool, read TIPM DTCs.

Are any active or stored PCM Communication DTCs set in the TIPM?

Yes

- Testing and Inspection and perform the appropriate diagnostic procedure.

No

- Replace and program the ACC Module.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Adaptive Cruise Control (ACC) Verification Test.