Massey Ferguson V412 – Hydraulic Control Unit / Implement ECU: External Hydraulic Valve 4 Issue

The fault code indicates a connection problem or circuit failure on the 4th external hydraulic spool valve (remote valve). The tractor's onboard diagnostic system has detected that the signal to or from the Valve 4 actuator/solenoid is out of range, typically caused by an open circuit, a short to ground, or a short to power within the solenoid circuit.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 4707
• 4708
• 4709
• 4710
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7614 through 7626
• 7714 through 7726S

1. 1

   Visually inspect the electrical connector at the #4 remote valve solenoid at the rear of the tractor for dirt, corrosion, or bent pins.

2. 2

   Inspect the wiring harness leading to the valve block for rub points, chafing, or breaks.

3. 3

   Use a multimeter to measure the resistance of the #4 valve solenoid coil to confirm ground integrity and check for an open or shorted coil.

4. 4

   Perform a swap test: Swap the solenoid coil from Valve #4 with Valve #3. If the fault code changes to a Valve 3 issue, the solenoid is the culprit. If the code remains on Valve 4, the issue is in the wiring harness or the ECU.

1. 1

   Power Down

   Turn off the tractor and engage the battery master switch to cut electrical power.

2. 2

   Clean the Area

   Thoroughly clean the rear external hydraulic valve block to prevent dirt from entering the hydraulic system.

3. 3

   Disconnect Wiring

   Unplug the electrical harness connector from the Valve 4 solenoid.

4. 4

   Remove the Solenoid

   Remove the retaining nut holding the solenoid coil to the valve cartridge. Slide the faulty coil off the stem.

5. 5

   Replace the Cartridge

   If the mechanical spool cartridge is also faulty or leaking, unthread it from the valve block (have a catch pan ready for hydraulic fluid loss) and install the new cartridge.

6. 6

   Install New Parts

   Slide the new solenoid coil onto the stem and secure it with the retaining nut.

7. 7

   Reconnect

   Plug the electrical harness back into the new solenoid.

8. 8

   Clear Codes

   Turn the battery master switch back on, start the tractor, and use a compatible diagnostic tool to clear the DTCs. Test the #4 remote valve for proper operation.