Massey Ferguson 04.X.A1 – TRANS: Issue With Transmission Actuator Internal Position Sensor (TRANS)

The transmission controller is receiving an implausible signal, an out-of-range value, or no signal from the internal position sensor of the transmission actuator, which electronically controls gear/range selection.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Check fuse F40 (15 A Min) to verify the power supply to the transmission actuator.

2. 2

   Inspect the wiring harness and connectors going to the transmission actuator for corrosion, moisture, or physical damage (poor connections can also trigger CAN BUS code 04.X.A2).

3. 3

   Attempt a transmission calibration via the tractor terminal (CAL1 screen). Press 'OK' to start, engine speed will adjust to 1100 rpm, and it will last approximately 2 minutes. If calibration fails or aborts, the internal sensor is likely permanently failed.

1. 1

   Preparation

   Park the tractor on a level surface, engage the park lock, and disconnect the battery ground cable to prevent electrical shorts.

2. 2

   Access the Actuator

   Locate the transmission actuator on the side of the DYNA VT transmission housing.

3. 3

   Removal

   Disconnect the multi-pin electrical connector from the actuator. Remove the mounting bolts securing the actuator to the transmission block and carefully pull the actuator away.

4. 4

   Installation

   Clean the mating surface on the transmission. Install the new transmission actuator (ensure any required O-rings or seals are in place and lubricated). Torque the mounting bolts to the manufacturer's specifications as outlined in the workshop manual.

5. 5

   Reconnection

   Reconnect the electrical harness and reconnect the battery.

6. 6

   Post-Repair Calibration

   You must perform a transmission calibration via the tractor terminal so the TRANS module can learn the end-stops and adaptation values of the new actuator's position sensor.