Massey Ferguson T250 – TRANS (Transmission Control Module): Issue With Powershift N Solenoid Supply Voltage (TRANS)

The transmission control module detects an abnormal current draw or voltage supply issue on the circuit for the Powershift module solenoid valve 'N' (X480).

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 5709
• 5710
• 5711
• 5712
• 5713
• 6712
• 6713
• 6714
• 6715
• 6716
• 6718
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726

1. 1

   Visually inspect the wiring harness leading to the 'N' solenoid (X480) on the side of the transmission for chafing, breaks, or melted insulation.

2. 2

   Disconnect the plug at the solenoid and check for water ingress, corrosion, or pushed-back pins.

3. 3

   Measure the resistance across the pins of the N solenoid and compare it to a known good solenoid on the same block (e.g., solenoids P or L). A dead short or an open reading indicates an internally failed solenoid coil.

4. 4

   Perform a voltage supply test at the harness connector with the key on and the transmission commanding the N solenoid to rule out a broken wire between the TRANS module and the solenoid.

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, and turn off the engine. Clean the area around the transmission solenoid bank thoroughly to prevent dirt from entering the hydraulic system.

2. 2

   Relieve Pressure

   Ensure all hydraulic and transmission pressure is relieved.

3. 3

   Disconnect Wiring

   Unplug the electrical connector from the faulty Powershift N Solenoid (X480).

4. 4

   Remove Solenoid

   Remove the retaining bolts or snap rings holding the solenoid valve into the transmission valve block.

5. 5

   Extract and Inspect

   Carefully pull the solenoid straight out. Inspect the bore for debris or scoring.

6. 6

   Install New Solenoid

   Lubricate the O-rings on the new solenoid with clean transmission fluid. Insert it into the bore and secure it with the retaining hardware.

7. 7

   Reconnect and Test

   Reconnect the wiring harness. Start the tractor, clear the T250 fault code using a diagnostic tool or the dash interface, and test the transmission through all powershift ranges to ensure smooth shifting and no returning codes.