Case IH 18315 (518578.02, 518578.07) - ACML – ACML: Joystick EHR float Switch ACML - error state

The fault code indicates an "error state" originating from the EHR (Electro-Hydraulic Remote) float switch located on the joystick/hand controller. The control module is receiving an out-of-range, erratic, or missing signal from this specific switch on the joystick.

• MAXXUM T4E
• VESTRUM CVX
• Case IH Maxxum Series
• Case IH Puma Series
• Case IH Magnum Series

1. 1

   Verify the EHR control unit and armrest dispenser controls are functioning.

2. 2

   Inspect joystick wiring, specifically circuits 5535, 5536, 5537, 5538 and CAN bus lines (EHR CAN HIGH / EHR CAN LOW).

3. 3

   Check for voltage drops or shorts in the proportional joystick rocker switches and X/Y axis sensors.

1. 1

   Check the Armrest Control Module (ACML)

   Verify the EHR control unit and armrest dispenser controls are functioning.

2. 2

   Inspect Joystick Wiring

   Check the EHR float switches (Valve #1 through #4) routing through specific circuits (e.g., circuits 5535, 5536, 5537, 5538) and CAN bus communication (EHR CAN HIGH / EHR CAN LOW).

3. 3

   Test the Switch

   Check for voltage drops or shorts in the proportional joystick rocker switches and X/Y axis sensors.

4. 4

   Repair/Replace

   If the wiring harness and CAN communication lines between the joystick and the ACML are intact, replace the faulty joystick hand controller or the ACML itself.