Case IH 18059 – Armrest Control Module (ACM): Joystick 2 proportional rocker switch - voltage too low

Indicates 'Joystick 2 proportional rocker switch - voltage too low'. If this specific joystick function is not applicable to your machine's setup (such as CCM/APH), the code may simply indicate an incorrect configuration of the ACM.

• Magnum
• Case IH Magnum 235 - 340 (Series 4)
• Case IH Steiger
• Case IH Puma

1. 1

   Verify that the Armrest Control Module (ACM) is configured correctly for the tractor's installed options using the Electronic Service Tool (EST)

2. 2

   Inspect the wiring harness and connectors between the Armrest Control Module and Joystick 2 for pinched wires, chafing, or disconnected pins

3. 3

   Verify that the joystick is receiving the correct reference voltage from the ACM

4. 4

   Test the proportional rocker switch on Joystick 2 for internal failure or a short to ground

1. 1

   Check ACM configuration

   Connect the diagnostic service tool to the tractor and check the ACM configuration settings. If the configuration is incorrect for your machine's hydraulic/joystick setup, reconfigure the ACM and clear the code.

2. 2

   Disconnect harness

   If the configuration is correct, power down the machine and disconnect the harness at Joystick 2 and the ACM.

3. 3

   Test signal wire

   Use a multimeter to perform continuity and short-to-ground tests on the signal wire for the proportional rocker switch.

4. 4

   Repair wiring

   Repair any damaged wiring or replace the damaged connector pins.

5. 5

   Replace switch or joystick

   If the wiring harness tests good and the ACM is outputting the correct reference voltage, the fault lies within the joystick itself. Replace the proportional rocker switch or the entire multi-function joystick assembly.

6. 6

   Verify repair

   Reconnect all components, power on the machine, and operate the joystick to verify the fault code does not return.