CVT Automatic Transaxle

U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

The Transmission Control Module (TCM) receives Engine rpm over the CAN Bus.

- When Monitored:
Ignition on with system voltage between 9.0 and 16.0 volts.

No lost communication faults detected.

- Set Condition:
An implausible vehicle speed signal sent from the ABS module for the period of 5.0 seconds.





Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. Testing and Inspection

Diagnostic Test

1. CHECK IF THE DTC IS ACTIVE
With the scan tool, read Transmission DTCs.
Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes

- Go To 2

No

- Go To 4

2. CHECK FOR FCM/TIPM CAN BUS DTCS
With the scan tool, read FCM DTCs.
Are there any FCM/TIPM CAN BUS DTCs present?

Yes

- Diagnose and repair DTC's.
- Perform CVT VERIFICATION TEST. Transmission Verification Test

No

- Go To 3

3. CHECK IF ABS DTCS ARE PRESENT
With the scan tool, read ABS DTCs.
Are there any ABS DTCs present?

Yes

- Diagnose and repair DTC's.
- Perform CVT VERIFICATION TEST. Transmission Verification Test

No

- Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM. Transmission Control Module - Removal
- Perform CVT VERIFICATION TEST. Transmission Verification Test

4. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorted and open circuits.
Were there any problems found?

Yes

- Repair as necessary.
- Perform CVT VERIFICATION TEST. Transmission Verification Test

No

- Test Complete.