Case IH 2664-09 - ACM – ACM: Joystick keypad disconnected while powered on

The control module lost communication with the Multi-Function Handle (MFH) / Joystick keypad while the tractor's electrical system was actively powered. This is typically caused by a sudden loss of power/ground to the joystick, a break in the CAN/LIN communication bus inside the armrest, or an internal hardware failure of the joystick itself.

• MAGNUM AFS Connect
• Case IH Magnum AFS Connect Series
• Case IH Steiger / Quadtrac AFS Connect Series

1. 1

   Perform a visual wiring inspection by removing the right-hand armrest trim panels to check the wiring harness connecting the joystick to the ACM for pinched wires, chafing, or loose connections.

2. 2

   Disconnect the main plug at the base of the joystick and inspect for bent pins, pushed-out terminals, or corrosion.

3. 3

   Test voltage and ground using a multimeter to verify the joystick is receiving proper operating voltage and has a solid ground connection at the harness connector.

4. 4

   Clear the fault code using the Case IH Electronic Service Tool (EST) or AFS Pro display, cycle the key, and retest to determine if it is a hard fault or intermittent.

1. 1

   Power Down

   Turn off the tractor and disconnect the battery ground cable to prevent electrical spikes to the ACM.

2. 2

   Access the Armrest

   Remove the retaining screws and plastic trim panels on the right-hand armrest console to expose the base of the joystick.

3. 3

   Disconnect Wiring

   Carefully unplug the electrical connector(s) from the bottom of the joystick assembly.

4. 4

   Remove the Joystick

   Remove the mounting bolts/screws securing the joystick base to the armrest frame. Lift the joystick out of the console.

5. 5

   Install New Joystick

   Place the new or remanufactured joystick into position and secure it with the mounting hardware.

6. 6

   Reconnect Wiring

   Plug the electrical connector(s) back into the new joystick, ensuring the locking tabs click into place.

7. 7

   Reassemble

   Reinstall the armrest trim panels and screws.

8. 8

   Power Up and Calibrate

   Reconnect the battery. Turn the key on and use the Case IH EST or AFS Pro display to clear the 2664-09 fault code. Perform any required joystick/MFH calibration procedures as prompted by the display to sync the new handle with the ACM.