Massey Ferguson T243 – Transmission Controller (Autotronic 5): Issue With Powershift L Solenoid Supply Voltage

Short circuit to +12 V on the circuit for the L X479 - Powershift module solenoid valve. The transmission controller detects that the measured current is > 40 mA in relation to the required value for the 'L' solenoid.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 4707
• 4708
• 4709
• 4710
• 5400 Series
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726

1. 1

   Locate the Powershift valve module on the side of the transmission and identify the specific solenoid designated as 'L' (X479)

2. 2

   Inspect the wiring harness running from the Autotronic 5 / Transmission ECU to the X479 solenoid 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 solenoid and check for water ingress, corrosion, or bent pins that could bridge the power supply

4. 4

   Measure the resistance across the pins of the 'L' solenoid coil. A reading of 0 ohms or significantly lower than the standard 10-ohm specification indicates an internal short inside the solenoid coil

1. 1

   Disconnect Power

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

2. 2

   Clean the Area

   Thoroughly clean the area around the Powershift module on the transmission to prevent dirt from entering the hydraulic system.

3. 3

   Remove the Faulty Solenoid

   Disconnect the electrical connector from the 'L' (X479) solenoid. Remove the retaining nut/bolts holding the solenoid coil and valve cartridge in place, and carefully slide it out.

4. 4

   Install the New Solenoid

   Lubricate the O-rings on the new solenoid valve with clean transmission fluid. Insert the new solenoid into the Powershift module and torque the fasteners to OEM specifications.

5. 5

   Reconnect and Test

   Reconnect the electrical harness. Reconnect the battery.

6. 6

   Clear Codes

   Turn the ignition on and use the tractor's dash interface (DCC) or a diagnostic tool to clear the T243 fault code.

7. 7

   Operational Test

   Start the tractor and test drive it, shifting through all powershift ranges to ensure smooth engagement and verify the code does not return.