2021 Jeep Cherokee High Altitude, Automatic T/Case ControlFACTORY OEM SERVICE PROCEDURE

HVAC Verification Test

Perform the following procedures to verify that the repair(s) are valid.

  1. Make sure that all accessories are turned OFF.
  2. Make sure that the battery is fully charged.
  3. Turn the ignition OFF.
  4. Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
  5. With the scan tool, record and erase all DTCs from ALL modules.
  6. Turn the ignition OFF, disconnect the scan tool from the Data Link Connector (DLC). Open the door and close the door. Wait a minimum of 30 seconds, then turn the ignition ON. Reconnect the scan tool.
    NOTE:

    Disconnecting the scan tool and opening and closing the door will allow the controller to enter into sleep mode.

  7. With the scan tool, perform the HVAC ACTUATOR CALIBRATION TEST.
  8. Start and run the engine for two minutes while operating all functions of the system that caused the original concern.
  9. With the scan tool, check for DTCs in all modules.

Are there any DTCs set? 

Yes 

No 

  • Repair is complete.
Factory Service Tools

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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.