Powertrain Control Module (PCM)

U1110-LOST VEHICLE SPEED MESSAGE

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

Theory of Operation

The Powertrain Control Module (PCM) receives the vehicle speed signal over the CAN C bus from the Anti-lock Brake Module.

- When Monitored:
Ignition on.

- Set Condition:
The PCM doesn't receive a vehicle speed signal from the Anti-Lock Brake Module over the CAN C bus.





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 DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

2. U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE ALSO SET
1. With a scan tool, select View DTCs.

Is the DTC U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE also set?

Yes

- Perform the U0121-00-Lost Communication with ABS diagnostic procedure. U0121-00

No

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