Case IH 18365 – ACML (Armrest Control Module): Joystick Button 12 ACML - error state

This fault indicates an electrical malfunction, out-of-range signal, or switch error specifically on Button 12 of the multi-function handle (joystick), frequently caused by poor electrical contact due to contamination, crushed wiring, or voltage fluctuations triggering false codes.

• VESTRUM CVX
• Puma
• Vestrum
• CVXDrive models
• Magnum
• Steiger series

1. 1

   Inspect the wiring harness for crushed, pinched, or damaged sections between the joystick and the ACML

2. 2

   Check for electrical contamination on the joystick button contacts and ACML connectors

3. 3

   Monitor for voltage fluctuations to see if voltage spikes or drops are triggering false error codes

4. 4

   Check the ACML software version to determine if the tractor is running an outdated version that is overly sensitive to signal delays

1. 1

   Inspect and Repair Wiring

   Trace the harness from the multi-function handle to the ACML. Repair any damaged or crushed wires.

2. 2

   Clean Contacts

   Clean the electrical connectors to resolve any poor electrical contact caused by contamination.

3. 3

   Update ACML Software

   Update the ACML software to version 3.1 (or newer). This revised software relaxes the error code parameters by increasing the error detection time threshold from 50 ms to 500 ms, which prevents false error states from logging.

4. 4

   Replace Hardware (if necessary)

   If the software update and wiring repairs do not resolve the issue, the multi-function joystick or the ACML unit itself has suffered a hard failure and must be replaced.