John Deere 001963.05 – SCO / SCU: SCV V Flow Control Solenoid Current Low for Float Operation

This fault code indicates an issue within the electrical circuit for the SCV V flow control solenoid, specifically during float operation. The '.05' suffix signifies that the current is below normal, indicating an open circuit. The Secondary Hydraulic Control Unit (SCO) has detected that the electrical current in this circuit is lower than the expected range, which typically points to a wiring issue, poor connection, or a faulty solenoid coil.

• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 8130
• 8230
• 8230T
• 8330
• 8330T
• 8430
• 8430T
• 8530
• 9230
• 9330
• 9430
• 9430T
• 9530
• 9530T
• 9630
• 9630T

1. 1

   Restart the tractor to see if an intermittent communication error clears

2. 2

   Inspect fuses related to the hydraulic system and controllers (specifically check fuse F29 for the SCO unit)

3. 3

   Visually inspect the area around the batteries and alternator for damage, corrosion, or loose connections affecting electrical supply

4. 4

   Inspect wiring harnesses and connectors leading to the SCV V solenoid for chafing, breaks, or corrosion

5. 5

   Check for 12 volts at the solenoid to verify it is receiving power from the controller

6. 6

   Test the solenoid coil on the SCV valve stack for proper resistance and inspect for damaged windings

7. 7

   Inspect the SCV internally for a sticking pilot valve or solenoid plunger caused by hydraulic fluid contamination

1. 1

   Relieve hydraulic pressure

   Before working on any hydraulic components, ensure all hydraulic pressure is relieved to prevent serious injury.

2. 2

   Access and disconnect solenoid

   Locate the SCV stack on the rear of the tractor (SCV V is typically one of the upper valves). Identify the flow control solenoid, disconnect the electrical connector, and inspect the terminals for corrosion or damage.

3. 3

   Test the circuit

   With the key on, command the SCV V float function and test for voltage at the harness connector. If voltage is present, the solenoid is likely faulty. If no voltage is present, the issue lies in the wiring between the controller and the solenoid, or the controller itself.

4. 4

   Replace faulty component

   If the solenoid is faulty, remove it from the valve body and install a new part. If the wiring is damaged, repair or replace the affected section of the harness. If the controller is diagnosed as the issue, replace it. Note that a new controller may require programming by a John Deere dealer.

5. 5

   Clear codes and calibrate

   After the repair, clear the diagnostic trouble codes. Recalibrate the SCV system if required by the service manual.

6. 6

   Test operation

   Operate SCV V and its float function to ensure the repair has resolved the issue and hydraulic flow is properly managed.