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Home >> Chrysler >> 2009 >> PT Cruiser Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (DTCS B2368 To P128C (TIPM)) >> P128B-TCM Power Control Circuit 2 Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK IF THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, check Transmission DTCs.

      Are there any Speed Sensor or Transmission Range Sensor DTCs present?

      Yes 

      • Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.

      No 

      • Go to step  2
  2. CHECK IF THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, check TIPM DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go to step  3

      No 

      • Go to step  6
  3. CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the TIPM C8 harness connector.
    3. Disconnect the TCM C1 harness connector.
    4. Measure the resistance between ground and the (T16) Transmission Control Output circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      No 

      • Go to step  4
  4. CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR AN OPEN 
    1. Turn the ignition off to the lock position.
    2. Reconnect the TIPM C8 harness connector.
    3. Ignition on, engine not running.
    4. Using the scan tool under the TIPM Actuators, actuate the Transmission.
    5. 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 at all the (T16) Transmission Control Output circuits?

      Yes 

      • Go to step  5

      No 

  5. 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 

  6. 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.