Massey Ferguson T248 – TRANS (Transmission Control Module): Issue With Powershift N Solenoid Supply Voltage (TRANS)

Short circuit to +12 V on the N X480 - Powershift module solenoid valve. The fault is triggered when the transmission controller detects that the measured current on this circuit is > 40 mA in relation to the required value for the "N" solenoid.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 5425
• 5435
• 5445
• 5455
• 5460
• 5465
• 5470
• 5475
• 5709
• 5710
• 5711
• 5712 SL
• 5713 SL
• 6445
• 6455
• 6460
• 6465
• 6470
• 6475
• 6480
• 6485
• 6490
• 6495
• 6497
• 6499
• 6612–6616
• 6711–6718S
• 7714–7726

1. 1

   Locate the Powershift module on the side of the transmission and identify the X480 (N) solenoid valve.

2. 2

   Inspect the wiring harness running from the TRANS module to the X480 solenoid. Look for chafed wires, melted insulation, or pinched harnesses that could cause a short to a +12V power source.

3. 3

   Disconnect the plug at the X480 solenoid. Check for water ingress, corrosion, or bent pins that could bridge the power supply.

4. 4

   With the solenoid disconnected and the key ON, use a multimeter to check the supply wire for unexpected +12V voltage (indicating a short to power in the harness).

5. 5

   Measure the resistance (Ohms) across the pins of the X480 solenoid coil itself. An internally shorted coil will show abnormally low resistance, causing the current spike (> 40 mA over required) that triggers the T248 code.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the negative battery terminal to prevent electrical spikes.

2. 2

   Access the Valve Block

   Clean the area around the transmission powershift valve block to prevent dirt from entering the hydraulic system.

3. 3

   Remove the Faulty Solenoid

   Disconnect the electrical connector from the X480 (N) solenoid. Remove the retaining nut/bolt holding the solenoid coil to the valve stem, or remove the entire cartridge valve if the mechanical portion is being replaced.

4. 4

   Install the New Solenoid

   Slide the new solenoid coil onto the valve stem and secure it, or thread the new cartridge valve into the block (torque to OEM specifications).

5. 5

   Reconnect and Reassemble

   Reconnect the electrical harness. Ensure the connector clicks into place and the weather seal is intact.

6. 6

   Test

   Reconnect the battery. Start the tractor, clear the T248 fault code using a diagnostic tool or the onboard dash interface, and cycle the transmission through its powershift ranges to verify the code does not return and the shift is smooth.