P128C
P128C-TCM POWER CONTROL CIRCUIT 2 HIGH - TIPMWiring Diagram:
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.
Possible Causes
- (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT SHORTED TO POWER
- TOTALLY INTEGRATED POWER MODULE (TIPM)
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 PCM C4 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 volts?
Yes >> Repair the (T16) Transmission Control Output circuit for a short to power.
Perform 40/41TE VERIFICATION TEST - VER 1 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 40/41TE VERIFICATION TEST - VER 1 Transmission Verification Test
No >> Replace the Totally Integrated Power Module.
Perform 40/41TE VERIFICATION TEST - VER 1 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 40/41TE VERIFICATION TEST - VER 1 Transmission Verification Test
No >> Test complete.