Case IH 2277 (517637.19) - DEC – DEC: CAN 2 - CltchPedTorqLim Error

The system is reporting a communication failure on the Controller Area Network 2 (CAN 2) bus. Specifically, the controller is receiving invalid, missing, or corrupted data regarding the 'Clutch Pedal Torque Limit' (the signal that tells the machine to limit torque based on the clutch pedal's position).

• MAXXUM T4E
• VESTRUM CVX
• Modern Case IH tractors equipped with CAN bus architecture and electronic clutch pedal torque limiting

1. 1

   Inspect the CAN 2 High and CAN 2 Low wiring harness between the cab (clutch pedal area) and the DEC for physical damage, chafing, or corrosion.

2. 2

   Verify the CAN 2 network integrity by testing the 120 Ohm terminating resistors on the cab/transmission harness.

3. 3

   Check the clutch pedal position sensor/potentiometer to ensure it is securely mounted and that its signal voltage changes smoothly (typically > 0%) when the pedal is depressed.

4. 4

   Cycle the ignition to see if the active error status clears or if it is a hard fault.

1. 1

   Turn off the tractor and disconnect the battery

   to prevent electrical shorts.

2. 2

   Locate the clutch pedal position sensor

   at the base of the clutch pedal assembly inside the cab.

3. 3

   Disconnect the sensor's pigtail connector and inspect the pins

   for pushed-out terminals or moisture intrusion. Clean with contact cleaner if necessary.

4. 4

   Replace the clutch pedal potentiometer

   If the wiring is intact but the sensor fails a resistance/sweep test, remove the mounting hardware and replace the clutch pedal potentiometer.

5. 5

   Trace the CAN 2 wiring harness back to the DEC

   If the sensor is good, trace the CAN 2 wiring harness back to the DEC, repairing any broken wires or replacing damaged sections of the harness.

6. 6

   Reconnect the battery, turn the ignition on, and clear the error memory

   Depress the clutch pedal to verify the torque limit signal is now being received by the DEC without throwing a CAN 2 error.