Case IH 69 – EHR (Electronic Hitch Control) module, Armrest Controller, or XCM (Central Controller): Control Lever EDC Raise/Lower Switch Failure

The EDC (Electronic Draft Control) system uses a fast raise/lower switch located on the operator's control lever or armrest to quickly lift or drop the 3-point hitch/implement. This code triggers when the control module detects an invalid signal, open circuit, or short circuit from this specific switch.

• MXM
• MXM Series
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Maxxum
• Puma

1. 1

   Inspect the EDC raise/lower switch on the control lever for physical damage, sticking buttons, or debris preventing full travel.

2. 2

   Verify the fuses powering the armrest controller and the tractor performance monitor/EDC system.

3. 3

   Access the wiring harness beneath the armrest console. Check the specific connector for the EDC switch for loose pins, corrosion, or a poor fit.

4. 4

   Using a multimeter, test the switch to ensure it correctly toggles between open and closed states. Verify that the reference voltage from the Armrest Controller is reaching the switch.

5. 5

   Look for other codes (e.g., CAN bus communication errors or hitch position sensor faults) that might indicate a broader module failure rather than an isolated switch failure.

1. 1

   Preparation

   Park the tractor on a level surface. Manually lower the 3-point hitch/implement to the ground to relieve hydraulic pressure. Turn off the engine and disconnect the battery.

2. 2

   Access the Switch

   Remove the retaining screws and carefully lift the trim/cover on the armrest console or the multi-function control lever to expose the internal wiring.

3. 3

   Disconnect

   Unplug the electrical harness connector directly attached to the EDC raise/lower switch.

4. 4

   Removal

   Unclip or unscrew the faulty switch assembly from its mounting point on the lever/console.

5. 5

   Installation

   Seat the new OEM switch into the control lever and secure it.

6. 6

   Reassembly

   Reconnect the electrical harness, ensuring the locking tab clicks into place. Reinstall the armrest console trim.

7. 7

   Calibration/Testing

   Reconnect the battery and turn the key to the ON position. Clear the stored fault codes. Start the tractor and test the fast raise/lower function to ensure the hitch responds correctly and that the Auto-PTO disengage/engage feature functions properly during the lift cycle.