Massey Ferguson 14.01.04 – TRANS1: High Pressure Brake System Pressure DYNA 6

The electronic control system has detected an abnormal pressure reading or signal fault within the high-pressure brake circuit (often related to the trailer brake system).

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5709 S/SL
• 5710 S/SL
• 5711 S/SL
• 5712 S/SL
• 5713 S/SL
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 4700 series
• 5600 series
• 7600 series

1. 1

   Locate the Trailer Brake Pressure Sensor on the master cylinder

2. 2

   Inspect the wiring harness and connectors leading to the brake pressure sensor for any signs of damage, corrosion, or an open circuit

3. 3

   Verify the sensor voltage/signal using a multimeter or diagnostic tool to check if the sensor is sending an out-of-range signal to the TRANS1 module

4. 4

   Check the actual hydraulic pressure in the brake system to verify it is not physically dropping too quickly or failing to drop, indicating a mechanical hydraulic issue

1. 1

   Depressurize the System

   Ensure the tractor is turned off and the hydraulic/air brake system is safely depressurized before servicing.

2. 2

   Disconnect the Sensor

   Unplug the electrical connector from the Trailer Brake Pressure Sensor located on the master cylinder.

3. 3

   Remove the Faulty Sensor

   Unscrew the old pressure sensor from the master cylinder assembly.

4. 4

   Install the New Sensor

   Thread the replacement OEM brake pressure sensor into the master cylinder and tighten to the manufacturer's specified torque.

5. 5

   Reconnect Wiring

   Plug the electrical connector back into the new sensor, ensuring the locking tab clicks into place.

6. 6

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool to clear the 14.01.04 fault code from the TRANS1 module.

7. 7

   Test Operation

   Start the tractor, actuate the brakes, and verify that the code does not return and that brake pressure registers correctly on the diagnostic tool.