Massey Ferguson 13.01.07 – TRANS1: Air Brake Solenoid Issue

The tractor's electronic control system has detected an electrical fault—such as an open circuit, short circuit, or abnormal current draw—in the circuit controlling the air brake solenoid valve.

• 7724S
• 5712SL
• 7722S
• 7722
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Wiring & Connector Inspection: Locate the Air Brake Solenoid (often designated as component Y40). Inspect the wiring harness between the TRANS1 module and the solenoid for chafing, pinched wires, or melted insulation.

2. 2

   Pin/Terminal Check: Disconnect the solenoid and check the connector pins for moisture, corrosion, or spread terminals, which can cause high resistance or open circuits.

3. 3

   Coil Resistance Test: Use a multimeter to measure the resistance across the solenoid coil pins. An infinite reading indicates an open internal coil, while a reading of 0 ohms indicates a dead short.

4. 4

   Voltage Supply Test: With the key ON and the brake actuated, verify that the TRANS1 module is sending the correct command voltage to the solenoid connector.

1. 1

   Depressurize the System

   Safely park the tractor on level ground, chock the wheels, and turn off the engine. Completely drain/depressurize the tractor's air brake system to prevent injury when removing the valve.

2. 2

   Locate the Valve

   Find the air brake solenoid valve assembly, typically mounted near the transmission housing or integrated into the trailer brake valve block.

3. 3

   Disconnect

   Unplug the electrical connector (Y40). Mark and disconnect the pneumatic air lines attached to the solenoid valve.

4. 4

   Remove and Replace

   Unbolt the faulty solenoid from its mounting bracket. Install the new solenoid valve, ensuring the air line fittings are sealed correctly (using thread sealant if required by the OEM).

5. 5

   Reconnect

   Reattach the air lines and plug in the electrical connector.

6. 6

   Test and Clear

   Start the tractor, allow the air compressor to build system pressure, and check for air leaks. Use a diagnostic tool or the tractor's onboard dashboard menu to clear the 13.01.07 fault code. Actuate the brakes to ensure the code does not return.