U1110-LOST VEHICLE SPEED MESSAGE
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.
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When Monitored:
Ignition on.
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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 (ABS) MODULE |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| 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. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) ALSO ACTIVE
| 1. | With a scan tool, select View DTCs. |
Is the U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) also set?
Yes
- Perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing).
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).