Case IH EHR4160 – EHR: Rear Remote No.5 Under Voltage

The EHR (Electronic Hitch and Remote) control unit has detected a voltage in the circuit for the rear remote number 5 that is below the normal operating range. This under-voltage condition indicates a potential electrical fault, such as a short circuit, open circuit, or failing component, which can impede the proper functioning of the associated hydraulic implement.

• Magnum 235
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 315
• Magnum 340
• Magnum 370
• Magnum 380

1. 1

   Check overall system voltage to ensure the battery is fully charged and the alternator is functioning correctly, as low overall voltage can trigger this fault.

2. 2

   Visually inspect the wiring harness leading to the number 5 rear remote valve for chafing, cuts, or pinch points.

3. 3

   Inspect the electrical connector at the solenoid for corrosion, dirt, or bent pins.

4. 4

   Clear the fault codes and operate the remote to see if the code immediately returns.

5. 5

   Perform a solenoid resistance test: disconnect the connector and measure resistance across the pins (healthy is 4 to 8 ohms; greater than 10 ohms indicates an open circuit, less than 3 ohms indicates a short).

6. 6

   Perform a voltage test at the solenoid: with the connector plugged in, measure DC voltage while an assistant operates the cab control lever (voltage should increase steadily, reaching approximately 5V in the detent position on some models).

7. 7

   If no voltage is present at the solenoid, check for voltage output directly at the EHR controller using a pinout diagram to rule out a controller failure.

1. 1

   Ensure Safety

   Before beginning any repairs, ensure the tractor is on level ground, the parking brake is engaged, the engine is off, and disconnect the battery.

2. 2

   Access the Remote Valve

   Locate the bank of rear remote hydraulic valves. Remote #5 will be one of the valves in this assembly.

3. 3

   Perform Diagnostic Tests

   Conduct the visual inspection, solenoid resistance test, and voltage tests as described in the diagnostic checks to pinpoint the faulty component.

4. 4

   Replace Faulty Component

   Based on the test results, replace the faulty solenoid, repair or replace the damaged wiring harness, clean or replace the connector, or replace the EHR controller if the solenoid and wiring are in good condition.

5. 5

   Reassemble and Test

   After replacing the suspected faulty part, reconnect the battery, clear any fault codes, start the tractor, and operate the #5 rear remote to confirm that it is functioning correctly and that the fault code does not reappear.