Case IH 4306 – EHR (Electro-Hydraulic Remote) control module: Rear Remote No. 6 - Over Voltage

Fault code 4306 indicates that the voltage supplied to or detected at the Rear Remote Control Valve No. 6 is exceeding the upper limit of the normal operating range. This over-voltage condition typically triggers when the system voltage spikes above 15 volts, or if there is a short-to-power in the valve's specific circuit.

• Magnum
• Steiger T4B
• Magnum series (e.g., 235 - 340 Series 4)
• Steiger series (e.g., STX 350 to 600)
• Puma series
• Maxxum series

1. 1

   Check System Voltage: Verify the tractor's battery and charging system voltage at the battery terminals while the engine is running. If higher than 15 volts, the alternator regulator is likely faulty.

2. 2

   Check for External Power: Verify that no external power supplies or jump-start packs are currently connected to the tractor's electrical system.

3. 3

   Inspect Controller Power and Ground: Check the power supply and ground cavities at the remote hydraulic controller connector. Ensure there is a clean, solid connection to ground.

4. 4

   Harness Inspection: Inspect the wiring harness running from the EHR controller to Rear Remote No. 6 for any chafing, melted insulation, or pinched wires that could cause a short-to-power (battery voltage).

5. 5

   Component Isolation: Swap the electrical connector from Remote No. 6 to another known-good remote valve (e.g., Remote No. 5). If the fault code changes to the corresponding code for the new valve, the issue is within the valve's solenoid/actuator. If the code remains 4306, the issue is in the wiring harness or the EHR controller.

1. 1

   Resolve Charging System Issues

   If the system voltage was found to be over 15V during diagnostics, replace the alternator or the alternator voltage regulator.

2. 2

   Repair Wiring

   If a short-to-power was found in the harness leading to Remote No. 6, splice and repair the damaged wire using weather-sealed connectors, or replace that section of the harness.

3. 3

   Clean Grounds

   Disconnect, clean, and retighten the ground connections for the EHR controller to ensure proper grounding.

4. 4

   Replace the EHR Valve

   If the wiring and charging system are functioning normally and the fault is isolated to the valve itself, the EHR valve (or its electronic actuator/solenoid) must be replaced.

5. 5

   Clear Codes and Calibrate

   After repairs are made, use the electronic service tool or the tractor's display monitor to clear the fault codes. Restart the tractor and test the No. 6 remote for normal operation. If a new valve was installed, a valve calibration procedure must be performed via the tractor's display.