48RE Automatic Transmission - Diesel

P128C-TCM POWER CONTROL CIRCUIT 2 HIGH - TIPM





For a complete wiring diagram refer to Diagrams/Electrical. Electrical Diagrams


- 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.








Diagnostic Test


1. CHECK IF THE DTC IS ACTIVE

Ignition on, engine not running.

With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 4



2. (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT SHORTED TO POWER





Turn the ignition off

Disconnect the TIPM C10 harness connector.

Disconnect the Transmission Solenoid harness connector.

Measure the voltage between the (T16) Transmission Control Output circuit at the at the TIPM C10 harness connector and ground.

Is the voltage above 10.0 v?

Yes

- Repair the (T16) Transmission Control Output circuit for a short to power.
- Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). Transmission Verification Test

No

- Go To 3



3. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors.

Pay particular attention to all Power and voltage circuits.

Were any problems found?

Yes

- Repair as necessary.
- Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). Transmission Verification Test

No

- Replace the Totally Integrated Power Module.
- Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). Transmission Verification Test



4. INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.

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 RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). Transmission Verification Test

No

- Test complete.