Case IH 14300 – Electronic Park Lock (EPL) controller: Electronic Park Lock (EPL) – mismatch between CAN and direct frequency input value

There is a discrepancy between the park lock status data being broadcast over the CAN bus network and the direct frequency signal being read by the controller.

• MAXXUM T4E
• Puma Series
• Magnum Series
• Maxxum Series
• Optum Series
• Steiger Series
• Farmall CVT

1. 1

   View calibration values and channel statuses in the diagnostic H-menus (XA module, menu H2 or H3)

2. 2

   Check for accompanying fault codes indicating a hard electrical failure (e.g., code 14301 for short/open circuits)

3. 3

   Connect special tool 380000843 and use the Electronic Service Tool (EST) to monitor the direct frequency input for dropouts or erratic fluctuations

4. 4

   Inspect the wiring harness between the EPL sensor/actuator and the EPL controller for chafing, corrosion, or loose pins

1. 1

   Secure the Tractor

   Ensure the tractor is on level ground. If required during the calibration procedure, firmly apply the service brakes to prevent the tractor from moving.

2. 2

   Prepare for Calibration

   Ensure the electronic park lock is released and the shuttle lever is placed in the park position.

3. 3

   Perform EPL Calibration

   Using the instrument cluster H-menus or the Case IH Electronic Service Tool (EST), initiate the Electronic Park Lock calibration procedure to resync the direct frequency input with the CAN bus values.

4. 4

   Component Replacement

   If the calibration fails or the mismatch immediately returns, the fault lies in a failing EPL sensor or the EPL controller itself. Replace the faulty component.

5. 5

   Clear Codes

   Once the repair or calibration is complete, clear the fault codes from the Electrically Erasable Programmable Read Only Memory (EEPROM).