U1426

U1426-IMPLAUSIBLE TCC SLIP REQUEST SIGNAL RECEIVED

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

- When Monitored:
Ignition on with no PCM/ECM CAN Bus DTCs present.

- Set Condition:
When the TCM receives an implausible Torque Converter Clutch slip request (EMCC) from the PCM/ECM.





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 FCM/TIPM CAN BUS DTCs
1. With the scan tool, read FCM/TIPM DTCs.

Are there any FCM/TIPM CAN BUS DTCs present?

Yes

- Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.
- Perform 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

- Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.
- Perform CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test

No

- Go To 4

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

No

- Test Complete.

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 CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test

No

- Test Complete.