U1120

U1120-LOST WHEEL DISTANCE MESSAGE





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

- When Monitored:
With the ignition on, the battery voltage between 9 and 16 volts and engine run time greater than three seconds.

- Set Condition:
The Powertrain Control Module (PCM) either doesn't receive a bus message or receives an implausible bus message from the Anti-Lock Brake (ABS) Module.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

1. Ignition on, engine not running.
2. With a scan tool, select View PCM DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Refer to the CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC.

2. U0121-LOST COMMUNICATION WITH ABS ALSO SET
1. With the scan tool, select View DTCs.

Is the U0141-LOST COMMUNICATION WITH ABS also set?

Yes

- Perform the appropriate diagnostic procedure for U0121. Totally Integrated Power Module (TIPM).

No

- Replace and program the Powertrain Control Module (PCM).
- Perform the POWERTRAIN VERIFICATION TEST. . PCM Verification Test