Case IH 18359 (2661.03, 2661.04) - ACML – ACML: Joystick Y-Axis Position Sensor Error

Fault code 18359 (often displayed alongside SPN 2661 FMI 03 or 04) indicates an error state with the Joystick Y-Axis Position sensor. 2661.03 indicates the Y-axis sensor circuit is Short to Power. 2661.04 indicates the Y-axis sensor circuit is Open or Short to Ground.

• MAXXUM T4E
• VESTRUM CVX
• Puma Series
• Maxxum Series
• Magnum Series
• Steiger Series
• Optum Series
• CVX / CVXDrive Series

1. 1

   Physical Inspection: Check the joystick physically to ensure it is not binding, obstructed by debris, or failing to spring back to the exact neutral position.

2. 2

   Live Data Verification: Access the tractor's diagnostic menu to view the live input voltage for the Joystick Y-axis. Observe if the voltage is stuck at 0V (indicating an open/short to ground) or maxed out at 5V/12V (indicating a short to power).

3. 3

   Harness Testing: Remove the armrest cover and inspect the wiring harness connecting the joystick to the ACML. Test for continuity and check for pinched wires, corroded pins, or loose connectors.

1. 1

   Disconnect Power

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

2. 2

   Access the ACML

   Remove the retaining screws on the armrest console to expose the joystick assembly and the Armrest Control Module.

3. 3

   Repair Wiring

   If the diagnostic checks revealed a broken wire or damaged connector pin between the joystick and the ACML, repair the harness.

4. 4

   Replace the Joystick

   If the wiring is intact, the internal Y-axis potentiometer/Hall-effect sensor has failed. Because the sensors are integrated, the joystick assembly must be replaced as a single unit. Disconnect the multi-pin CNH plug, unbolt the joystick base from the armrest mount, and install the new assembly.

5. 5

   Recalibrate

   After installing the new joystick, power on the tractor. You must perform a joystick calibration procedure via the tractor's display monitor to teach the ACML the new minimum, maximum, and neutral voltage values for the Y-axis.