Massey Ferguson 04.02.9B – TRANS2: Issue With Powershift N Solenoid Supply Voltage

The transmission control system has detected an abnormal voltage condition (such as an open circuit, short to ground, or short to power) on the electrical supply circuit dedicated to the Powershift 'N' solenoid. When this fault is active, the tractor will likely refuse to shift between certain ranges or may fail to move altogether.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5600 Series
• 6400 Series
• 6600 Series
• 7600 Series
• 5700 SL Series
• 7700 Series
• 7700 S Series

1. 1

   Verify system voltage by checking that the battery is fully charged (approx. 12.6V resting) and the alternator is outputting correct voltage, as low voltage can trigger false solenoid faults.

2. 2

   Inspect transmission control fuses and relays located in the MVEC relay boxes (rear right-hand side) or in the cab console.

3. 3

   Inspect the wiring harness and connectors running from the TRANS2 module to the transmission solenoid block for chafed wires, melted insulation, or corrosion inside the connector for the 'N' solenoid.

4. 4

   Perform a solenoid resistance test by disconnecting the electrical connector at the Powershift N solenoid and using a multimeter to measure resistance across the pins. An open circuit (infinite resistance) or short (near 0 ohms) indicates internal failure.

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, lower all implements, and turn off the engine.

2. 2

   Locate the Solenoid

   Locate the Dyna transmission range change solenoid bank on the side of the transmission housing. Identify the specific 'N' solenoid (refer to your specific model's service manual diagram for the exact position on the block).

3. 3

   Clean the Area

   Thoroughly clean the area around the solenoid block with brake cleaner or compressed air to prevent dirt from entering the hydraulic system.

4. 4

   Removal

   Disconnect the electrical connector from the faulty solenoid. Remove the retaining bolt or snap-ring/clip holding the solenoid in the valve block.

5. 5

   Extraction

   Pull the solenoid straight out of the bore. Have a shop rag ready, as a small amount of transmission fluid will leak out.

6. 6

   Installation

   Lubricate the O-rings on the new OEM solenoid with clean Massey Ferguson transmission fluid. Carefully insert the new solenoid into the bore, ensuring it seats fully without pinching the O-rings.

7. 7

   Secure and Reconnect

   Reinstall the retaining bolt/clip and torque to OEM specifications. Reconnect the electrical harness.

8. 8

   Clear Codes and Test

   Turn the ignition on, clear the 04.02.9B fault code via the tractor's dashboard diagnostic menu or a dealer diagnostic tool, and test drive the tractor to verify smooth shifting through all powershift ranges.