U1412

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED



Theory of Operation

The ABS Module sends vehicle speed information over the CAN C Bus circuit to the Powertrain Control Module (PCM).

- When Monitored:
Ignition on.

- Set Condition:
The Powertrain Control Module (PCM) gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously monitored.





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

1. ACTIVE DTC

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 CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. Checking for an Intermittent DTC.

2. DTC U0001-CAN C BUS IS ACTIVE IN THE PCM
1. With a scan tool, select View DTCs.

Is the DTC U0001-CAN C BUS Active in the PCM?

Yes

- U0001 Perform the U0001-Can C Bus diagnostic procedure.

No

- Go To 3

3. ABS MODULE IS ACTIVE ON THE CAN C BUS
1. Using the Network Review Screen on the scan tool, 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) Perform the No Response from ABS diagnostic procedure.

4. DTC U0001-CAN C BUS ACTIVE IN THE FCM
1. With the scan tool, select View DTCs in the TIPM.

Is the DTC U0001-CAN C BUS Active in the TIPM?

Yes

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

No

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