Case IH 518566-13 - ACM – ACM: EHR lever 8 (or H) sensor disagreement

The system is detecting an implausible, conflicting, or out-of-range signal from the internal position sensor of the Electro-Hydraulic Remote (EHR) lever #8 (Lever H). This typically indicates that the lever's physical position does not match the electrical voltage value expected by the controller, which can be caused by a loss of calibration, outdated software, or a physical failure of the lever's internal sensor.

• MAGNUM AFS Connect
• Case IH Magnum AFS Connect series
• Case IH Steiger AFS Connect series
• Other Case IH models utilizing the Vision Pro operating system and ACM architecture with up to 8 remote valves

1. 1

   Check if the EHR lever was recently calibrated, as loss of calibration is the most common cause of sensor disagreement codes.

2. 2

   Inspect the wiring harness and connectors between the EHR lever H and the Armrest Control Module (ACM) for loose pins, corrosion, or damaged wires.

3. 3

   Verify the current software version of the ACM, as CNH has issued service bulletins regarding ACM software updates to address EHR lever calibration and sensor error codes.

1. 1

   Recalibrate the EHR Lever

   Enter the tractor's diagnostic/calibration menu (via the Vision Pro display or EIC). Select the EHR lever calibration procedure. Follow the on-screen prompts to move the lever through its full range of motion (Neutral, Float, Lower, Raise) to relearn the sensor voltage values.

2. 2

   Update ACM Software

   If the lever fails to calibrate or the code returns immediately, download and install the latest ACM software package using the Electronic Service Tool (EST).

3. 3

   Repeat Calibration

   After any software update, you must repeat the EHR lever calibration procedure for all levers.

4. 4

   Replace the Component

   If the fault code persists after a software update and a successful calibration attempt, the internal sensor has failed. The EHR lever control unit must be removed from the armrest and replaced.

5. 5

   Final Calibration

   Once the new lever is installed, perform a final EHR lever calibration to marry the new sensor to the ACM.