P128C

P128C-TCM POWER CONTROL CIRCUIT 2 HIGH





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

- When Monitored:
With the ignition on. Battery voltage greater than 10 volts.

- Set Condition:
A shorted condition is detected in the TIPM Transmission Control Output circuit.





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

1. CHECK IF THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read TIPM DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 4

2. (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT SHORT TO VOLTAGE
1. Turn the ignition off to the lock position.
2. Disconnect the TIPM C10 harness connector.
3. Disconnect the TCM C1 harness connector.
4. Ignition on, engine not running.
5. Measure the voltage of the (T16) Transmission Control Output circuit.

Is the voltage above 10.0 volts?

Yes

- Repair the (T16) Transmission Control Output circuit for a short to voltage.
- Perform the CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test.

No

- Go To 3

3. TOTALLY INTEGRATED POWER MODULE
1. Using the schematics as a guide, inspect the wire harness and connectors.
2. Check the TIPM harness connector terminals for corrosion, damage, or terminal push out.
3. Pay particular attention to all power and ground circuits.

Were there any problems found?

Yes

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

No

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST. Body 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 wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

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

No

- Test complete.