Case IH 18060 – Armrest Control Module (ACM): Joystick 2 proportional rocker switch - voltage too high (not applicable to CCM/APH _it may indicate incorrect configuration of the ACM)

The control module is receiving a signal voltage from the proportional rocker switch on Joystick 2 that exceeds the maximum expected threshold (typically a short to a 5V reference or 12V power source). However, as the code description explicitly notes, this often triggers not because of a physical electrical short, but because the control module is incorrectly configured in the software and is looking for a joystick signal that does not physically exist on the machine.

• Magnum
• Magnum Series 180-380
• Magnum Series 235-340 (Series 4)
• Puma Series 115-240
• Puma Series 165-225 CVX
• Steiger / Quadtrac Series 350-600
• Maxxum Series 100-150

1. 1

   Verify ACM Configuration: Connect the Electronic Service Tool (EST) and verify that the Armrest Control Module (ACM) software configuration matches the physical joystick options installed on the tractor.

2. 2

   Inspect the Wiring Harness: Check the wiring harness between Joystick 2 and the ACM for any rubbed wires causing a short to power (either the 5V reference or 12V battery power).

3. 3

   Test the Joystick Disconnected: Disconnect Joystick 2. If the signal voltage at the ACM drops, the internal proportional rocker switch is shorted. If the voltage remains high, the wiring harness is shorted to power.

4. 4

   Check Reference and Ground: Ensure the joystick is receiving its proper 5V reference and has a solid ground. A lost ground can cause the signal voltage to float high.

1. 1

   Connect the EST

   Hook up the Case IH Electronic Service Tool to the tractor's diagnostic port.

2. 2

   Check/Flash Configuration

   Navigate to the Armrest Control Module (ACM) settings. Ensure the software dataset correctly reflects whether "Joystick 2" is installed. If the tractor does not have a second joystick, reconfigure the ACM to disable it. If this was the issue, clear the code and you are done.

3. 3

   Isolate the Circuit

   If the configuration is correct and the tractor does have Joystick 2, turn off the key and disconnect the harness at the joystick.

4. 4

   Test for Harness Shorts

   Turn the key back on and check the signal wire pin on the machine side of the harness with a multimeter. If it reads high voltage (5V or 12V) while disconnected, trace the harness back to the ACM and repair the shorted wire.

5. 5

   Replace the Switch/Joystick

   If the harness tests fine, the proportional rocker switch inside the joystick has failed internally. Depending on the specific armrest build, you will need to replace either the rocker switch knob assembly or the entire Joystick 2 unit.

6. 6

   Clear and Calibrate

   Reconnect all components, clear the fault code 18060 via the EST, and perform a joystick calibration if required by the service manual.