Massey Ferguson 4.X.9B – Transmission Control Module (TRANS2): Issue With Powershift N Solenoid Supply Voltage (TRANS2)

The transmission control system has detected an improper voltage level (either an open circuit, short, or out-of-range voltage) on the electrical supply circuit dedicated to the "N" powershift solenoid.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7722
• 7724
• 7726

1. 1

   Inspect the wiring harness and connectors between the TRANS2 module and the Powershift N Solenoid for chafed wires, corrosion, or loose pins

2. 2

   Use a multimeter to verify if the transmission control module is sending the correct reference voltage to the solenoid when commanded

3. 3

   Check the internal resistance (ohms) of the Powershift N Solenoid to see if the coil has failed (shorted or open)

1. 1

   Preparation

   Clean the work area on the side of the transmission where the solenoid bank is located to prevent dirt or debris from entering the hydraulic system.

2. 2

   Removal

   Disconnect the electrical connector from the faulty Powershift N Solenoid. Remove the retaining bolts or snap rings holding the solenoid in the valve block, and carefully extract the old solenoid.

3. 3

   Installation

   Lubricate the O-rings/seals on the new solenoid with clean transmission oil. Insert the new solenoid into the valve body and secure it with the retaining hardware.

4. 4

   Reconnection

   Reconnect the electrical wiring harness to the new solenoid.

5. 5

   Calibration

   After replacing a transmission solenoid valve, it is often necessary to use the tractor's diagnostic interface to calibrate the transmission control unit and clutch packs to ensure smooth shifting.

6. 6

   Testing

   Clear the 04.02.9B fault code from the TRANS2 module and test-drive the tractor through its powershift ranges to verify the repair.