U1412

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Ignition on.

- Set Condition:

The PCM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously monitored. One trip fault.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Theory of Operation

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

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.

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 INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

2. U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT IS ACTIVE

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-NO COMMUNICATION ON THE CAN C BUS CIRCUIT.

No

- Go To 3

3. ABS MODULE IS ACTIVE ON THE CAN C BUS

With the scan tool, select ECU View.

Verify that the ABS Module active on the bus.

Is the ABS Module Active on the bus?

Yes

- Go To 4

No

- Refer to Computers and Control Systems/Testing and Inspection for No Response diagnostic procedures.
- Perform BODY VERIFICATION TEST VER - 1. Body Verification Test

4. ACTIVE DTCS IN THE FCM

With the scan tool, select ECU View and select FCM.

With the scan tool, View Active DTCs.

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

Yes

- Replace the ABS Module.
- Perform BODY VERIFICATION TEST VER - 1. Body Verification Test

No

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