Massey Ferguson A.1X.19 – Vehicle Control Module (VCM) or Hydraulic/EHR (Electronic Hitch Relief) Controller: External Hydraulic Valve 1 Issue

The tractor's onboard diagnostic system has detected a fault in the circuit or operation of the first external hydraulic remote valve (spool valve). This typically points to an electrical issue such as an open circuit, a short to ground, or a loss of communication with the valve's electronic solenoid/actuator.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Check the electrical connector at External Hydraulic Valve 1 (usually the first remote valve block at the rear of the tractor) for moisture, corrosion, or backed-out pins.

2. 2

   Inspect the wiring harness leading to the valve for rub points, breaks, or melted insulation that could cause a short to ground or an open circuit.

3. 3

   Use a multimeter to measure the resistance of the valve's solenoid coil. Ensure it is not reading as an open circuit (infinite resistance) or a dead short.

4. 4

   Verify that the valve is receiving proper ground and reference voltage when commanded by the cab controls.

1. 1

   Safety First

   Turn off the tractor, lower all implements to the ground to relieve hydraulic pressure, and disconnect the negative battery terminal.

2. 2

   Access the Valve

   Locate External Hydraulic Valve 1 at the rear remote valve stack.

3. 3

   Disconnect

   Unplug the electrical harness connector from the valve's solenoid.

4. 4

   Wiring Repair

   If the diagnostic checks revealed a broken wire or damaged connector, splice in a new pigtail connector or repair the harness using weather-sealed connectors.

5. 5

   Component Replacement

   If the wiring is intact but the solenoid coil failed the resistance test, remove the retaining nut/screws holding the solenoid to the valve cartridge. Slide the old solenoid off and install the replacement, torquing the fastener to OEM spec.

6. 6

   Reassembly

   Reconnect the electrical harness to the valve.

7. 7

   Clear Codes

   Reconnect the battery, turn the key to the ON position, and use a compatible Massey Ferguson diagnostic tool to clear the 0A.1X.19 code from the system.

8. 8

   Test

   Start the tractor and cycle the Remote 1 lever/button to confirm proper hydraulic function and ensure the code does not return.