Case IH 4180 – EHR (Electronic Hitch Remote): Rear EHR control no.4 - not calibrated (DU module only) / Rear Remote No.4 - Lever Not Calibrated

The electronic controller has lost the stored calibration values (potentiometer voltage limits) for the number 4 rear remote hydraulic lever or spool valve, or the valve has never been successfully calibrated.

• Magnum
• Maxxum
• Steiger T4B
• MAXXUM T4E
• VESTRUM CVX
• Magnum series
• Steiger series
• Puma series
• Maxxum series

1. 1

   Check for related circuit codes (4181 open circuit or 4182 short circuit). If present, fix the wiring harness or replace the faulty lever potentiometer first, as calibration will fail.

2. 2

   Ensure the tractor's hydraulic fluid is brought up to normal operating temperature, as cold oil can cause calibration procedures to fail or set incorrect values.

3. 3

   Verify that the #4 rear remote lever moves freely through its entire range of motion (extend, retract, and float detents) without physical binding.

1. 1

   Prepare the tractor

   Park the tractor on a level surface, engage the parking brake, and ensure no implements are connected to the rear remotes.

2. 2

   Warm up hydraulic oil

   Start the engine and allow the hydraulic oil to reach operating temperature.

3. 3

   Enter calibration menu

   Enter the tractor's "HH" calibration menu via the instrument cluster (using the "h" and "m" keys) or via the AFS Pro display / Electronic Service Tool (EST).

4. 4

   Navigate to EHR calibration

   Navigate to the calibration menu for the EHR (Electronic Hitch / Rear Remotes).

5. 5

   Select valve channel

   Select the channel for Rear Remote Valve No. 4.

6. 6

   Calibrate the lever

   Follow the on-screen prompts to calibrate the lever. This typically requires moving the #4 remote lever to its maximum extend position, maximum retract position, float position, and back to neutral so the controller can learn the minimum and maximum potentiometer voltages.

7. 7

   Save and cycle power

   Save the calibration and cycle the key switch to store the values.

8. 8

   Test operation

   Test the #4 remote to ensure the fault code has cleared and the valve operates correctly.