U1400

U1400-IMPLAUSIBLE TPS SIGNAL RECEIVED

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

Theory of Operation

The Transmission Control Module (TCM) receives two throttle position related signals over the CAN Bus. One is the throttle pedal position and the other is a throttle pedal position toggle bit. When the Toggle signal pattern is out of range from a predefined signal pattern a DTC will set.

- When Monitored:
Ignition on with no Lost Communication with ECM/PCM DTCs present.

- Set Condition:
When the throttle pedal position toggle signal pattern is out of range from a predefined signal pattern for the period of 1 second.





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

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

Is the status Active or is the Starts Since Set counter 2 or less for this DTC?

Yes

- Go To 2

No

- Go To 4

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. Testing and Inspection.
- Perform CVT TRANSMISSION VERIFICATION TEST. Transmission Verification Test.

No

- Go To 3

3. CHECK IF ECM/PCM 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. Testing and Inspection .
- Perform CVT TRANSMISSION VERIFICATION TEST. Transmission Verification Test.

No

- Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM.
- Perform CVT TRANSMISSION VERIFICATION TEST. Transmission Verification Test.

4. 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. Transmission Verification Test.

No

- Test Complete.