Case IH 18356 (2690.07, 4174.02, 4174.03, 4174.04) - ACML – ACML: Error state on Joystick Button 6

The control module is receiving an invalid electrical signal from Button 6 on the Multi-Function Handle (MFH).

• MAXXUM T4E
• VESTRUM CVX
• Magnum Series (235, 260, 290, 340)
• Steiger Series (500)
• Puma Series
• Maxxum Series
• Optum Series

1. 1

   Check Button 6 on the Multi-Function Handle for physical damage, sticking, or debris lodged around the switch.

2. 2

   Access the tractor's diagnostic menu via the Pro 600/700/1200 display or the Electronic Service Tool (EST) to monitor the live switch state of 'Joystick 2 button 6' and see if the module registers the button press or if it is stuck in an active/error state.

3. 3

   Inspect the wiring harness and the multi-pin connector between the Multi-Function Handle and the Armrest Control Module (ACML) for chafing, bent pins, or corrosion.

4. 4

   Test the button circuit for continuity to determine if the internal switch has failed or if there is a short in the armrest wiring.

1. 1

   Power down the tractor and disconnect the battery to prevent electrical shorts.

   Power down the tractor and disconnect the battery to prevent electrical shorts.

2. 2

   Remove the plastic trim and covers from the armrest console to access the joystick mounting hardware and wiring.

   Remove the plastic trim and covers from the armrest console to access the joystick mounting hardware and wiring.

3. 3

   Locate and disconnect the OEM multi-pin electrical connector for the Multi-Function Handle.

   Locate and disconnect the OEM multi-pin electrical connector for the Multi-Function Handle.

4. 4

   Remove the mounting screws/hardware securing the joystick assembly to the armrest.

   Remove the mounting screws/hardware securing the joystick assembly to the armrest.

5. 5

   Install the new Multi-Function Handle assembly and secure it with the mounting hardware.

   Install the new Multi-Function Handle assembly and secure it with the mounting hardware.

6. 6

   Reconnect the electrical harness and reassemble the armrest trim.

   Reconnect the electrical harness and reassemble the armrest trim.

7. 7

   Reconnect the battery, turn on the key, and use the diagnostic display to verify that the fault code can be cleared and that Button 6 now functions correctly.

   Reconnect the battery, turn on the key, and use the diagnostic display to verify that the fault code can be cleared and that Button 6 now functions correctly.