Case IH 4547 – EHR (Electro Hydraulic Remote) / AUX Controller: Front remote No.4 - over voltage

The control module is receiving a voltage signal from the front remote valve #4 circuit (or its corresponding control potentiometer/joystick) that is higher than the expected maximum limit. This typically indicates a short to power or an open ground in the sensor/valve circuit.

• Puma/Mid Range Magnum
• MAXXUM T4E
• Puma series
• Magnum series
• Maxxum series
• Steiger / Quadtrac series
• Optum series
• Quantum series

1. 1

   Check the live voltage/potentiometer reading for Front Remote #4 using the tractor's diagnostic mode or a diagnostic tool to see if it is stuck at a high voltage (e.g., 5V).

2. 2

   Inspect the 4-wire CAN harness and wiring between the armrest multi-function handle/joystick and the front remote valve block for rubbed wires causing a short to power or a broken ground wire.

3. 3

   Swap the electrical connection from remote #4 to another compatible remote to see if the over-voltage code follows the valve or stays with the armrest control/wiring.

1. 1

   Depressurize the System

   Turn off the engine and ensure all pressure is relieved from the hydraulic circuits before removing any caps, covers, or valves to prevent injury.

2. 2

   Access the Faulty Component

   Depending on your diagnostic results, access either the armrest controller (to replace the joystick/potentiometer) or the front remote valve block.

3. 3

   Replace the Component

   If the wiring is shorted, repair or replace the damaged harness section. If the armrest potentiometer is failed internally, replace the potentiometer or the multi-function handle encoder. If the EHR valve's internal output stage/driver is faulty, replace the remote valve section.

4. 4

   Reassembly

   Reconnect all electrical harnesses and hydraulic lines. Ensure the working area is clean to prevent contamination of the hydraulic system.

5. 5

   Calibration

   Turn the key switch ON and use the tractor's diagnostic menu to perform a hydraulic remote valve calibration. This stores the new spool movement limits and potentiometer base values in the EEPROM.