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Home >> Jeep >> 2019 >> Grand Cherokee Laredo, AWD, Full Time T/Case Control >> Repair and Diagnosis >> External Pages >> Different car >> Section 342 (Electronic Control Modules (Service Information)) >> Module, Powertrain Control (Pcm) >> Module Programming >> Pcm Programming
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Pcm Programming

WARNING: This page is about a different car, the 2021 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.

This procedure is required when one or more of the following situations are true:

This procedure assumes that the scan tool is properly configured to the dealership network with either a wired or wireless connection. For help on how to network the scan tool, use the "Help" tab at the top of the diagnostic application.

PROGRAMMING PROCEDURE  - Using the scan tool:

  1. If the PCM is being replaced with a new one, generate a scan report from the original PCM.
  2. Obtain Authorization PIN which can be accessed by certain dealer personnel from the DealerCONNECT Key Code menu for use later.
  3. Connect a battery charger to the vehicle to maintain adequate system voltage during the flash update.
  4. Flash the PCM - If multiple calibrations are available, consult the scan report from the original PCM to determine the correct calibration part number.
  5. Run the PCM "Misc functions" and select "Check PCM VIN" and follow the on screen instructions. When complete, select "Finish".
  6. Run the PCM "Misc functions" and select "Learn ETC" and follow the on screen instructions. When complete, select "Finish".
  7. Run the PCM "Misc functions" and select "Brake Pedal Learn" and follow the on screen instructions. When complete, select "Finish".
  8. Run Guided Diagnostic Immobilizer Modules Replacement (Guided Diagnostics can be accessed from the Activities section in the left margin menu). You will need the PIN obtained in step 2. 
  9. Verify the vehicle starts and runs.
  10. Run the PCM "Misc functions" and select "Check PCM Odometer" and follow the on screen instructions. When complete, select "Finish".
  11. Run Guided Diagnostic PROXI Configuration Alignment to write vehicle configuration to the PCM.
  12. Clear any DTCs.
  13. Road test vehicle to learn Adaptive Numerator.
    NOTE:

    Due to the PCM/TCM programming procedure, a DTC may be set in other ECUs within the vehicle. Some DTCs may cause the MIL to illuminate. From the "Home" screen select "System View". Then select "All DTCs". Press "Clear All Stored DTCs" if there are any DTCs shown on the list. 

  14. Verify that no DTCs have set.
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