Case IH 518560-01 - ACM – ACM: Internal failure in EHR lever 2

The internal circuitry, potentiometer, or encoder within EHR lever 2 (Lever B) has failed, preventing the module from accurately reading the lever's position command (raise/lower/float).

• MAGNUM AFS Connect
• Magnum AFS Connect series
• Steiger AFS Connect series
• Puma series (Tier 4A / Tier 4B and newer)
• Optum series (Tier 4A / Tier 4B and newer)

1. 1

   Check for Software/Calibration Issues: Attempt to recalibrate the EHR levers using the tractor's display (EIC/Pro 1200). If the lever was recently replaced or the controller updated, it must be calibrated. If calibration fails or the code immediately returns, proceed to hardware checks.

2. 2

   Inspect Wiring: Open the armrest controller housing and inspect the wiring harness and connector to EHR Lever 2. Ensure there are no pinched wires, shorts, or loose connections.

3. 3

   Swap Test: Swap the electrical connection of EHR Lever 2 (Lever B) with an adjacent lever (e.g., EHR Lever 3). If the fault code changes to the corresponding code for Lever 3 (518561-01), the lever itself is confirmed faulty. If the code remains 518560-01, the issue lies within the ACM or the armrest wiring harness.

1. 1

   Disconnect battery power

   Turn off the tractor and disconnect battery power to prevent electrical shorts while servicing the ACM.

2. 2

   Open armrest housing

   Remove the retaining screws to open the MultiControl Armrest housing/console.

3. 3

   Disconnect wiring harness

   Locate the EHR lever block. Disconnect the specific wiring harness connector attached to EHR Lever 2.

4. 4

   Remove mounting hardware

   Remove the mounting hardware securing the faulty EHR lever to the armrest assembly.

5. 5

   Install new lever

   Remove the old lever and install the new replacement EHR lever.

6. 6

   Reconnect wiring and hardware

   Secure the mounting hardware and reconnect the wiring harness.

7. 7

   Reassemble housing

   Reassemble the armrest housing.

8. 8

   Restore power

   Restore battery power and turn the tractor key to the ON position.

9. 9

   Calibrate EHR lever

   Perform the EHR lever calibration procedure via the tractor's display so the ACM can learn the new lever's minimum, maximum, and neutral potentiometer values.