U1110

U1110-LOST VEHICLE SPEED MESSAGE

U1110-Lost Vehicle Speed Message:

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.

POSSIBLE CAUSES
- CAN C BUS Circuit Open Or Shorted
- Anti-lock Brake Module
- PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Theory of Operation
The PCM receives the vehicle speed signal over the CAN C bus from the Anti-lock Brake Module.

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.
With the scan tool read Powertrain DTCs.

Q: Is the DTC active at this time?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Component Tests and General Diagnostics
Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

2. U0121-LOST COMMUNICATION WITH ABS MODULE ALSO SET

With the scan tool continue reading DTCs.

Q: Is the U0121-LOST COMMUNICATION WITH ABS MODULE also set?

YES: Follow the diagnostics for U0121-LOST COMMUNICATION WITH ABS MODULE Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Replace and program the Powertrain Control Module. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test