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. Initial Inspection and Diagnostic Overview .

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



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


- Perform No Response diagnostic procedures.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test



4. ACTIVE DTCS IN THE TIPM
With the scan tool, select ECU View and select TIPM.
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 POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


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