New Holland 18052 – ACU: Joystick 1 Y-axis Position – Voltage Too High

The Armrest Control Unit (ACU) has detected a voltage from the joystick's Y-axis position sensor that is above the expected maximum threshold, suggesting a fault in the joystick's internal sensor, the wiring, or the controller itself. This signifies that the signal wire for the joystick's vertical movement (Y-axis) is carrying a voltage that exceeds the normal operating range (implausibly high). This fault can lead to erratic or non-functional behavior of the hydraulic operations controlled by the joystick's Y-axis.

• T6.140
• T6.150
• T6.155
• T6.160
• T6.165
• T6.175
• T7.170
• T7.185
• T7.200
• T7.210
• T7.220
• T7.230
• T7.235
• T7.245
• T7.250
• T7.260
• T7.270
• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.380
• T8.390
• T8.410
• T8.420
• T8.435
• T9.390
• T9.435
• T9.450
• T9.480
• T9.505
• T9.530
• T9.565
• T9.600
• T9.615
• T9.645
• T9.670
• T9.700

1. 1

   Inspect the wiring harness leading to the joystick for damage, such as chafing, pinching, or breaks in the insulation, paying close attention to areas where the harness flexes with the armrest or seat.

2. 2

   Disconnect and reconnect the main electrical connector for the joystick to ensure a secure connection.

3. 3

   Check the connectors for any signs of moisture ingress or corrosion on the pins, which can cause short circuits and voltage irregularities.

4. 4

   Review for other active fault codes (e.g., 18061, 18062) that could indicate a broader electrical or reference voltage issue.

5. 5

   Utilize On-Board Diagnostics (the 'H' menu), if available on your model, to test the functionality of buttons and potentiometers to confirm if the joystick is sending faulty signals.

1. 1

   Calibrate the joystick

   If your machine supports it, enter the diagnostic 'learn' or calibration mode. Move the joystick through its full range of motion to reset the neutral and maximum travel positions. Consult the operator's manual or a qualified technician to see if this is an option for your specific model.

2. 2

   Prepare for joystick replacement

   If calibration is not possible or does not resolve the issue, disconnect the negative battery terminal and carefully disassemble the armrest control panel to gain access to the joystick mounting.

3. 3

   Remove the faulty joystick

   Disconnect the electrical connector from the base of the joystick, remove the mounting hardware, and lift the old joystick out.

4. 4

   Install the new joystick

   Install the new joystick assembly, ensuring it is correctly seated. Reconnect the electrical connector and reassemble the armrest.

5. 5

   Test functionality

   Reconnect the battery and test the functionality of the new joystick to ensure the fault code is cleared and hydraulic operations are restored.