Powertrain Control Module (PCM)

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 C bus messages from the Anti-lock Brake (ABS) module.

- When Monitored:
With the ignition on, the battery voltage between 9.0 and 16.0 volts and engine run time greater than three seconds.

- Set Condition:
The Powertrain Control Module (PCM) either doesn't receive a bus message or receives an implausible bus message from the Anti-Lock Brake (ABS) Module.





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

Diagnostic Test

1. ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, select View 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. ABS MODULE IS ACTIVE ON THE CAN C BUS
1. With the scan tool, select ECU View.
2. Verify that the ABS Module is active on the bus.

Is the ABS Module active on the bus?

Yes

- Go To 3

No

- Perform the No Response From ABS diagnostic procedure. Manufacturer Code Charts.

3. DTCS STORED OR ACTIVE IN THE ABS MODULE
1. Check for DTCs in the ABS Module.

Are any DTCs active or stored in the ABS Module?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.

No

- Go To 4

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.

Are there any Communication DTCs active in the BCM relating to the ABS System?

Yes

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

No

- Replace and program the Powertrain Control Module (PCM). Programming and Relearning.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.