Case IH 4152 – EHR (Electronic Hitch/Hydraulic Remote): Rear Remote No.4 - Output Stage Faulty

This code indicates an electrical fault in the output stage (the driver circuit) that controls the spool valve for Rear Remote #4. The controller is unable to properly drive the solenoid/actuator for that specific remote valve, which is typically caused by an internal driver failure within the module, an open circuit, or a short circuit in the wiring.

• Magnum
• Maxxum
• Steiger T4B
• MAXXUM T4E
• Case IH Magnum (235-340 Series 4)
• Case IH Steiger (350-600)
• Case IH Puma (165, 180, 195, 210, 225 CVX)
• Case IH CVX

1. 1

   Verify that the lever for remote #4 is in the neutral position to rule out plausibility faults from a stuck lever or potentiometer.

2. 2

   Inspect the wiring harness and connectors between the EHR controller and the Rear Remote #4 valve slice for open circuits, shorts to ground, or shorts to power.

3. 3

   Verify the resistance of the spool valve solenoid to ensure it is within specification and not shorting out the EHR controller's output driver.

4. 4

   Ensure the EHR module is receiving proper operating voltage and ground.

1. 1

   Clean and Reconnect

   Disconnect the electrical connector at the Rear Remote #4 valve. Clean the contacts with electrical contact cleaner, apply dielectric grease, and reconnect to rule out a simple poor connection.

2. 2

   Repair Harness

   If the wiring harness tests faulty (open or shorted), repair the damaged section or replace the EHR control valve wiring harness.

3. 3

   Replace the Pilot Head / Valve Slice

   If the wiring tests good, the fault often lies within the pilot head of the valve itself (which contains the actuator). Replace the pilot head.

4. 4

   Replace the EHR Controller

   If the valve and wiring are perfectly intact, the output driver inside the EHR controller has failed, and the module itself must be replaced.

5. 5

   Reassign and Calibrate

   After replacing the pilot head or EHR controller, you must reassign the valve addresses so the controller knows which cab lever controls which valve. Finally, perform a hydraulic calibration procedure (which may require a dealer service tool) to tune the valve for proper flow and function.