Case IH 18264 (518415.03, 518415.04) - ACML – ACML: Joystick Proportional Rocker Switch ACML - error state

Indicates a voltage or signal plausibility issue with the proportional rocker switch located on the multi-function control lever (joystick). Voltage is either too low (short to ground/0V) or too high (short to 12V), or there is an incorrect configuration within the Armrest Control Module (ACM).

• MAXXUM T4E
• VESTRUM CVX
• Case IH Magnum 235 - 340 (Series 4)
• Case STX Steiger tractors (350, 400, 450, 500, 550, 600 horsepower models)

1. 1

   Verify the Armrest Control Module (ACM) configuration using the electronic service tool (EST) to rule out false joystick rocker switch voltage errors.

2. 2

   Test the internal 5V reference voltage circuit to the armrest controls to ensure it is not shorted to 0V or 12V.

3. 3

   Inspect the wiring harness between the multi-function joystick and the ACML for open circuits, chafing, or shorts to ground/power.

4. 4

   Monitor the live voltage data of the proportional rocker switch while actuating it to see if the signal drops out or spikes out of the normal operational range.

1. 1

   Verify fault code status

   Connect the Case IH Electronic Service Tool (EST) and verify if the fault code is active or stored.

2. 2

   Clear error codes

   Clear the error codes. If the code immediately returns, the fault is a hard failure in the switch or wiring.

3. 3

   Test joystick pins

   Disconnect the multi-function joystick harness connector and test the pins for the proportional rocker switch with a multimeter.

4. 4

   Isolate fault

   If the wiring harness tests good (no shorts to ground or power, and continuity is present to the ACML), the fault lies within the joystick assembly itself.

5. 5

   Replace joystick assembly

   Replace the faulty armrest dispenser controls / multi-function joystick assembly.

6. 6

   Perform calibrations

   Reconnect the EST and perform any necessary calibrations for the new joystick/EHR controls.