Operation CHARM: Car repair manuals for everyone.
Home >> Jeep >> 2008 >> Compass 2WD L4-2.0L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P128C
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

P128C







P128C-TCM POWER CONTROL CIRCUIT 2 HIGH - TIPM





For a complete wiring diagram Consult Diagrams/Electrical.

- 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. Testing and Inspection

Diagnostic Test

1. CHECK IF THE DTC IS ACTIVE
Ignition on, engine not running.
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
Turn the ignition off to the lock position.
Disconnect the TIPM C10 harness connector.
Disconnect the TCM C1 harness connector.
Ignition on, engine not running.
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 CVT VERIFICATION TEST. Transmission Verification Test

No

- Go to 3


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

Yes

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

No

- Replace the Totally Integrated Power Module.
- Perform CVT VERIFICATION TEST. 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 CVT VERIFICATION TEST. Transmission Verification Test

No

- Test complete.

pro multis · About Operation CHARM