Case IH 18042 – Armrest Controller: EHR (remote valve) 2 lever position - voltage too low

This code indicates that the voltage signal coming from the potentiometer inside the Electronic Hitch/Hydraulic Remote (EHR) lever #2 is falling below the acceptable minimum threshold. This condition is typically caused by a failed potentiometer inside the lever assembly, an open circuit in the wiring, or a short to ground. When this happens, the tractor may disable the #2 remote valve, or the valve may fail to hold pressure or return to neutral properly.

• Magnum
• Steiger T4B
• Case IH Magnum Series
• Case IH Steiger & Quadtrac Series
• Case IH Puma Series
• Case IH Maxxum Series

1. 1

   Check the physical movement of the #2 remote valve lever to ensure it moves smoothly and springs back to the exact center (neutral) position without sticking.

2. 2

   Lift the armrest console and inspect the wiring harness connecting the #2 lever to the Armrest Controller for pinched wires, loose connector pins, or corrosion that could cause a voltage drop.

3. 3

   Attempt to recalibrate the EHR levers via the tractor's display (Pro 700 or A-post monitor). If the monitor shows the lever in the 'lower' position when it is physically in 'neutral,' the potentiometer has failed.

4. 4

   Consult a Case IH dealer to see if an Armrest Controller software update is available for your specific serial number to widen the neutral deadband.

1. 1

   Preparation

   Turn off the tractor, remove the key, and disconnect the battery to prevent electrical shorts.

2. 2

   Access the Levers

   Remove the retaining screws holding the top cover of the armrest control console. Carefully lift the cover to expose the remote valve lever modules.

3. 3

   Removal

   Locate the #2 EHR lever assembly. Disconnect its electrical wiring harness connector. Unbolt the faulty lever assembly from the armrest mounting bracket and remove it.

4. 4

   Installation

   Seat the new lever assembly into the bracket and secure it with the mounting bolts. Reconnect the electrical harness connector.

5. 5

   Reassembly

   Carefully reinstall the armrest console cover and tighten the retaining screws. Reconnect the battery.

6. 6

   Calibration

   Turn the key to the ON position. You must perform the EHR hydraulic calibration procedure using the in-cab display so the Armrest Controller can learn the new potentiometer's specific voltage limits for the extend, retract, and neutral positions.