Case IH 12181 - EPL – Electronic Park Lock (EPL) Controller: Actuator - Actuation timeout, dynamic misuse

The EPL actuator failed to reach its commanded position (applied or released) within the expected time limit, or the system detected a 'dynamic misuse' (such as the operator attempting to engage the park lock while the tractor is still in motion, or a mechanical binding preventing the actuator from moving).

• VESTRUM CVX
• Puma 140
• Puma 180
• Puma 185
• Puma 195
• Puma 225
• Puma 240
• Magnum 225
• Magnum 255
• Magnum 285
• MX210
• MX230
• MX255
• MX285

1. 1

   Check battery voltage and load test the battery; clean and tighten cables, as low voltage or amperage can cause the actuator to move too slowly and trigger a timeout.

2. 2

   Verify the clutch pedal switch is engaging properly by listening for a physical click when depressed. Check if the adjustment screw has backed out, preventing the switch from triggering.

3. 3

   Inspect the wiring harness and connections leading to the EPL actuator for tugged, damaged, or corroded wires.

4. 4

   Check for mechanical binding inside the transmission to ensure the park lock mechanism is not physically jammed.

1. 1

   Park tractor

   Park the tractor on a flat, open surface.

2. 2

   Prepare tractor for calibration

   Ensure the handbrake is released and the shuttle lever is in the park position.

3. 3

   Insert diagnostic test switch

   Insert the diagnostic test switch (Special Tool 380000843) into the diagnostic connector located in the cab on the right-hand side rear pillar behind the operator's seat.

4. 4

   Access diagnostic menu

   Access the 'H' menu mode on the instrument cluster.

5. 5

   Select EPL sub-system

   Select the Electronic Park Lock (EPL) sub-system by depressing the 'dimming' button.

6. 6

   Navigate to calibration

   Use the 'h' and 'm' buttons to navigate to the calibration channel.

7. 7

   Calibrate EPL

   Follow the on-screen prompts to calibrate the EPL applied position, released position, and the accelerometer.

8. 8

   Replace EPL actuator

   If the calibration fails, or if the actuator motor is burnt out, physically replace the EPL actuator.

9. 9

   Recalibrate new actuator

   After installing a new actuator, repeat the calibration procedure.