2009 Jeep Liberty Limited, 4WD, Part TimeFACTORY OEM SERVICE PROCEDURE

Diagnostic Test

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

      Is the status Active for this DTC?

      Yes 

      • Go to step  2

      No 

      • Go to step  4
  2. CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR AN OPEN 
    Fig 1: CHECKING TRANSMISSION CONTROL OUTPUT CIRCUIT FOR OPEN
    GC0102098Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the PCM C4 harness connector and install PCM Pinout Box 8815.
    3. Disconnect the Transmission Solenoid harness connector.
    4. Disconnect the Line Pressure Sensor/Variable Force Solenoid harness connector (if equipped).
      CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the PCM Pinout Box 8815 to perform diagnosis.
    5. Ignition on, engine not running.
    6. Using the scan tool under the TIPM Actuators, actuate the Transmission.
    7. Using a 12-volt test light connected to ground, check the (T16) Transmission Control Output circuits.
      NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly?

      Yes 

      • Go to step  3

      No 

  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 any problems found?

      Yes 

      No 

  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 

      No 

      • Test complete.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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