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HOMESERVICE MANUALSDODGE AND RAM2024PROMASTER 3500 BASE, CUTAWAYREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 73 (MOTOR CONTROL PROCESSOR MODULE (MCPA) - DTCS P1CDF-00 TO U358D-19)DTC TROUBLESHOOTINGP288A-00 PARK LOCK/PAWL ACTUATOR CIRCUIT HIGHDIAGNOSTIC TEST
2024 Dodge and Ram ProMaster 3500 Base, Cutaway

Diagnostic Test

2024 Dodge and Ram ProMaster 3500 Base, CutawaySECTION Diagnostic Test
WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN 
    WARNING:

    On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury.

    Read the HIGH-VOLTAGE SAFETY PROCEDURES. Refer to  HIGH VOLTAGE SAFETY PROCEDURES  . 

    When the HIGH-VOLTAGE POWER-DOWN PROCEDURE is necessary. Refer to  VEHICLE HIGH VOLTAGE POWER DOWN  . 

    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK THE PARK PAWL MOTOR CONTROL OUTPUTS 
    1. Disconnect the Park Pawl Motor harness connector.
    2. Connect a volt meter between the (H159) Park Pawl Motor Control (+) circuit and the (H158) Park Pawl Motor Control (-) circuit at the Park Pawl Motor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, under EVCU, Actuators Tab, perform the Park Pawl Actuator Control function to engage the Park Pawl.

      Does the volt meter show a corresponding voltage change when the Park Pawl is commanded?

      Yes 

      No 

      • Verify that the (H159) Park Pawl Motor Control (+) circuit and the (H158) Park Pawl Motor Control (-) circuits are not open or shorted to ground, repair if necessary. If the circuits are not open or shorted to ground, replace the Power Inverter Module (PIM) in accordance with the Service Information. Refer to POWER INVERTER MODULE (PIM) .
      • Perform the Motor Control Processor A (MCPA) VERIFICATION TEST. Refer to MOTOR CONTROL PROCESSOR A (MCPA) VERIFICATION TEST .
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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.