U1412

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED

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

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. PCM Pre-Diagnostic Troubleshooting Procedure.

Diagnostic Test

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

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

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. PCM Intermittent Condition Test.

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

- Totally Integrated Power Module (TIPM) and perform the U0001-CAN C Bus diagnostic procedure.

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

- No Response From ABS (Antilock Brake Module) and perform the No Response from ABS diagnostic procedure.

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. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

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