P128C

P128C-TCM POWER CONTROL CIRCUIT 2 HIGH





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

- When Monitored:
With the ignition on with the battery voltage greater than 10.0 volts.

- Set Condition:
The Totally Integrated Power Module (TIPM) has detected voltage on the Transmission Control Output circuit when none should be present.





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

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the TIPM C10 harness connector.
3. Disconnect the PCM C1 harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (T16) Transmission Control Output circuit.

Is the voltage above 10.0 volts?

Yes

- Repair the short to voltage in the (T16) Transmission Control Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Using the schematics as a guide, check the Totally Integrated Power Module (TIPM) terminals for corrosion, damage, water intrusion, or terminal push out. Check for any Service Bulletins that may apply. If no problems are found, replace and program the TIPM.
- Perform the BODY VERIFICATION TEST. Body Verification Test.