New Holland 4731 – ACM: Joystick Y-Axis Signal Short to 5V

The Armrest Controller Module (ACM) has detected that the voltage on the signal wire for the joystick's Y-axis (forward and backward movement) is inappropriately high, at or near the 5-volt reference level. This indicates an electrical short to 5V in the Y-axis signal circuit, which prevents the controller from determining the operator's intended joystick position.

• T6.140
• T6.160
• T6.175 AutoCommand
• T7.170
• T7.185
• T7.210
• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T7.290
• T7.315
• T7030
• T7040
• T7050
• T7060
• T7070
• T8.275
• T8.320
• T8.350
• T8.380
• T8.410
• T8.435
• T9.435
• T9.480
• T9.530
• T9.565
• T9.600

1. 1

   Verify general electrical health, ensuring the battery is fully charged (above 12.5V) and all main power and ground connections to the cab, chassis, and armrest controller are clean and tight.

2. 2

   Visually inspect the wiring harness leading from the joystick base to the armrest controller for physical damage, chafing, pinched wires, or corrosion in the connectors.

3. 3

   With the battery disconnected and joystick unplugged, use a multimeter to check for continuity between the Y-axis signal pin and the 5V reference pin on the joystick side of the harness (there should be no continuity).

4. 4

   Test the joystick's Y-axis potentiometer wiper function by measuring resistance (Ohms) between the signal and ground terminals while moving the joystick forward and back. The reading should change smoothly without erratic jumps or dropouts.

1. 1

   Disconnect Power

   Ensure the tractor's battery is disconnected.

2. 2

   Access the Joystick Assembly

   Remove the necessary armrest covers and panels to gain access to the joystick mounting bolts and wiring.

3. 3

   Remove the Joystick

   Disconnect the electrical harness from the base of the joystick and unbolt the assembly from the armrest.

4. 4

   Replace the Faulty Component

   Option A: Replace the entire joystick assembly. Option B: Replace the potentiometer by opening the joystick housing, desoldering the three terminals of the faulty Y-axis potentiometer, installing the new potentiometer, soldering the terminals securely, and reassembling the housing.

5. 5

   Reinstall and Reconnect

   Mount the repaired or new joystick assembly back into the armrest and reconnect the electrical harness.

6. 6

   Reassemble and Test

   Reassemble all armrest panels. Reconnect the battery.

7. 7

   Perform Calibration

   Access the tractor's diagnostic menu on the IntelliView monitor. Select the joystick or armrest calibration routine and move the joystick to its full limits to teach the controller the new range of motion.