Case IH 2661-13 - ACM – ACM: Joystick y-axis sensor disagreement.

The joystick utilizes Hall-effect technology to translate operator commands (forward/backward movement on the Y-axis) into electronic signals. A "disagreement" fault indicates that the dual redundant sensors for the Y-axis are sending conflicting voltage signals to the controller, meaning their outputs no longer match the expected correlation.

• MAGNUM AFS Connect
• Steiger
• Puma

1. 1

   Check ACM Configuration: Verify that the ACM is configured correctly for the specific joystick installed, as incorrect configuration can trigger false Y-axis voltage faults.

2. 2

   Inspect Wiring and Connections: Inspect the multi-pin CAN-bus connector at the base of the joystick and the wiring harness leading to the Armrest Control Module for backed-out pins, corrosion, or chafed wires.

3. 3

   Check Reference Voltage: Verify that the joystick is receiving a steady 5-volt reference and a solid ground from the ACM.

4. 4

   Attempt Calibration: Use the Case IH Electronic Service Tool (EST) or the in-cab AFS Pro 1200 display to perform a joystick calibration to re-learn the X and Y axis limits.

1. 1

   Power Down

   Turn off the machine and disconnect the battery to prevent CAN bus communication errors or short circuits during disassembly.

2. 2

   Access the Armrest

   Remove the plastic trim covers and retaining screws on the armrest control panel to expose the joystick mounting hardware.

3. 3

   Disconnect the Joystick

   Unplug the OEM multi-pin electronic connector from the bottom of the joystick assembly.

4. 4

   Remove the Assembly

   Unbolt the joystick assembly from the armrest integrated control module.

5. 5

   Install the New Part

   Mount the replacement joystick, secure the bolts, and reconnect the multi-pin connector.

6. 6

   Reassemble and Calibrate

   Reinstall the armrest trim panels. Reconnect the battery, power on the machine, and use the EST or the AFS Pro 1200 display to perform a mandatory joystick calibration so the ACM learns the new Y-axis sensor values.