Case IH 18052 – Armrest Controller Module (ACM): Joystick 1 Y-axis position - voltage too high

The signal voltage returning from the Y-axis sensor on Joystick 1 has exceeded the maximum allowable threshold programmed into the controller. This condition is typically caused by a short to power (12V or 5V reference) on the signal wire, an open ground circuit to the joystick, or an internal hardware failure of the joystick's sensor.

• Magnum
• Steiger T4B
• Magnum Series
• Steiger Series
• Puma Series
• CVX Series
• Maxxum Series
• Optum Series

1. 1

   Visually inspect the multi-pin connector at the base of the joystick for backed-out pins, corrosion, or moisture.

2. 2

   Test the ground circuit to the joystick; an open ground will cause the sensor's signal voltage to float to the 5V reference maximum.

3. 3

   Check the Y-axis signal wire for continuity to the Armrest Controller Module (ACM) and ensure it is not shorted to a power source.

4. 4

   Monitor live voltage of 'Joystick 1 Y-axis position' using the Case IH EST or Pro700/AFS display. If voltage reads near 5.0V in neutral and wiring tests good, the joystick has failed internally.

1. 1

   Power Down

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

2. 2

   Disassembly

   Remove the armrest cover/pod tray to access the joystick mounting bracket.

3. 3

   Removal

   Disconnect the OEM multi-pin CNH plug from the bottom of the joystick. Remove the retaining screws (often #8-32 self-tapping screws) securing the joystick to the armrest console.

4. 4

   Installation

   Seat the new joystick assembly into the armrest and secure it with the mounting screws. Reconnect the multi-pin electrical connector.

5. 5

   Reassembly

   Reinstall the armrest cover/tray and reconnect the tractor's battery.

6. 6

   Calibration

   Perform an SCV/Joystick calibration using the Case IH EST software or the in-cab display so the Armrest Controller Module can learn the new minimum, maximum, and neutral center voltage values for the X and Y axes.