Case IH 18045 – Armrest Controller: EHR (remote valve) 3 lever position - voltage too high

This code indicates that the control module is receiving a voltage signal from the 3rd Electro-Hydraulic Remote (EHR) valve control lever's internal potentiometer that exceeds the maximum expected threshold. This typically points to a short to power in the wiring, an open ground circuit, or a complete internal failure of the lever's potentiometer.

• Magnum
• Steiger T4B
• Case IH Magnum Series
• Case IH Steiger Series
• Case IH Puma Series

1. 1

   Perform a visual wiring inspection inside the armrest console, checking the harness to the 3rd remote valve lever for pinched wires, loose pins, or corrosion.

2. 2

   Perform a component isolation (swap test) by swapping the 3rd remote lever's electrical plug with an adjacent known-good lever (e.g., 4th remote) to see if the fault follows the lever or remains on the circuit.

3. 3

   Attempt a calibration check of the armrest remote levers using the A-post display or Case IH EST; a failed calibration confirms a hard electrical fault.

1. 1

   Power down the tractor, remove the key, and disconnect the battery to prevent electrical damage.

2. 2

   Remove the retaining screws and carefully lift the upper housing/cover of the armrest console to access the remote valve control levers.

3. 3

   Locate the control lever assembly for the 3rd remote valve.

4. 4

   Disconnect the electrical harness connector from the faulty lever.

5. 5

   Remove the mounting hardware (screws/plates) securing the lever assembly to the armrest console.

6. 6

   Install the new remote valve control lever assembly and secure it with the mounting hardware.

7. 7

   Reconnect the electrical harness connector.

8. 8

   Reassemble the armrest console housing.

9. 9

   Reconnect the battery and power on the tractor.

10. 10

    Perform a hydraulic remote lever calibration using the A-post display or the Case IH EST.

    This allows the armrest controller to learn the specific neutral, full-forward, and full-backward voltage values of the new potentiometer.

11. 11

    Clear the inactive fault codes and test the 3rd remote valve for proper operation.