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. Pre-Diagnostic Troubleshooting Procedure.

1. CHECK DTC IS CURRENT
1. Turn the ignition ON, Engine Not Running.
2. With the scan tool, select View DTCs.

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

Yes

- Go To 2

No

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

2. U0001- CAN C BUS CIRCUIT IS ACTIVE
1. Continue reading DTCs.

Is U0001-CAN C BUS CIRCUIT ACTIVE at this time?

Yes

- Perform the appropriate diagnostic procedure. Perform the diagnostic procedure for DTC U0001-CAN C BUS first if the fault is present U0001.

No

- Go To 3

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

Is the ABS Module active on the bus?

Yes

- Go To 4

No

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

4. ACTIVE DTCS IN THE BODY CONTROL MODULE (BCM)
1. With the scan tool, select ECU View and select BCM.
2. With the scan tool, read Active DTCs.

Is the U0002-CAN C BUS OFF PERFORMANCE active in the BCM 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). PCM/ECM Reprogramming.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.