U1412

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED





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

Theory of Operation

The Powertrain Control Module (PCM) receives:

Wheel speed and wheel distance CAN bus messages from the Anti-lock Brake (ABS) module.

- 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 PCM either doesn't receive a bus message or receives an implausible bus message from the Anti-Lock Brake Module.





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

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

Is the U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED Active at this time?

Yes

- Go To 2

No

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

2. U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT IS ACTIVE
1. Continue reading DTCs.

Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE at this time?

Yes

- Refer to the Diagnostic Procedure for the U0001-CAN C BUS. Totally Integrated Power Module (TIPM).

No

- Go To 3

3. ABS MODULE IS ACTIVE ON THE CAN C BUS
1. With the scan tool, select ECU View.
2. Verify that the ABS Module is active on the bus.

Is the ABS Module active on the bus?

Yes

- Go To 4

No

- Go To the No Response diagnostic procedures. . No Response From ABS (Antilock Brake Module)

4. ACTIVE DTCS IN THE TOTALLY INTEGRATED POWER MODULE (TIPM)
1. With the scan tool, select ECU View and select TIPM.
2. With the scan tool, read Active DTCs.

Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE in the TIPM at this time?

Yes

- Replace the ABS Module.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

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