U1412

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED




For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.
Theory of Operation

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

- When Monitored:
Ignition on.

- Set Condition:
The ECM 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. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.

Is the 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-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

- For the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT diagnostic procedure.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 that the ABS Module active on the bus.

Is the ABS Module active on the bus?

Yes

- Go To 4

No

- For No Response diagnostic procedures, Communications - Verbose Codes.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. ACTIVE DTCS IN THE FCM (TIPM)
1. With the scan tool, select ECU View and select FCM (TIPM).
2. With the scan tool, read 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 the ABS VERIFICATION TEST. ABS Verification Test.

No

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