U1407

U1407-IMPLAUSIBLE ENGINE TORQUE REQUEST SIGNAL RECEIVED

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition on with a system voltage between 9.0 and 16.0 volts with no CAN DTCs detected.

- Set Condition:
When the TCM receives an implausible engine torque request from the PCM over the CAN Bus.





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

1. CHECK IF THE DTC IS ACTIVE
1. With the scan tool, read Transmission DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 5

2. CHECK FOR TIPM CAN BUS DTCs
1. With the scan tool, read TIPM DTCs.

Are there any TIPM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.
- Perform the CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test.

No

- Go To 3

3. CHECK IF ENGINE DTCs ARE PRESENT
1. With the scan tool, read engine DTCs.

Are there any engine DTCs present?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.
- Perform the CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test.

No

- Go To 4

4. CHECK THE PCM
1. Replace and program the PCM.
2. Perform the CVT TRANSMISSION VERIFICATION TEST. . CVT Transmission Verification Test

Does the DTC reset?

Yes

- 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.
- Perform the CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.

5. CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.

Were there any problems found?

Yes

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

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.