Case IH EHR4142 – TCU: No EHR Control Messages Rear Remote 4

The main tractor control module (TCU) has lost CAN bus communication with the electronic control unit integrated into the number four rear electronic hydraulic remote (EHR) valve. This fault is triggered when the main controller sends a command to the remote and receives no response, indicating an electrical or communication failure rather than a mechanical or hydraulic issue.

• Magnum 215
• Magnum 235
• Magnum 245
• Magnum 250
• Magnum 260
• Magnum 275
• Magnum 280
• Magnum 290
• Magnum 305
• Magnum 310
• Magnum 315
• Magnum 335
• Magnum 340
• Magnum 370
• Magnum 380

1. 1

   Visually inspect the wiring harness leading to the number four rear remote valve for chafing, cuts, or corrosion, paying close attention to articulation points.

2. 2

   Disconnect and inspect the electrical connector at the number four remote valve for bent or corroded pins, ensuring it is clean and securely fastened.

3. 3

   Swap the solenoid from remote number four with a known working remote (e.g., number three) to determine if the solenoid itself is faulty.

4. 4

   Using a digital multimeter, check for correct CAN high and CAN low voltages at the connector for the number four remote valve.

5. 5

   Perform a continuity test on the wires between the main control module and the number four remote valve connector to identify any open circuits or shorts.

6. 6

   Check the tractor's display to ensure the remote valve configuration settings are correct.

1. 1

   Repair or replace wiring harness

   If the wiring harness is found to be damaged, repair or replace the affected section. Ensure all connections are properly sealed to prevent future moisture ingress.

2. 2

   Replace solenoid valve

   If the solenoid on the remote valve is determined to be the cause, replace it as a separate component.

3. 3

   Replace EHR lever

   If the issue lies with the EHR lever in the cab, replace the lever assembly.

4. 4

   Update software or replace control module

   In rare cases, have a qualified technician perform a software update or diagnose and replace the main control modules using appropriate electronic service tools.