Massey Ferguson P215 – Autotronic 5 (Auto 5): Park Brake Activated Solenoid Voltage Issue Dyna 6 (HITCH)

This fault code indicates an electrical voltage anomaly (such as a short circuit to +12V, short to ground, or an open circuit) on the circuit controlling the Park Brake Activated Solenoid (often referred to in OEM manuals as the ParkLock solenoid valve). When this fault is active, the controller cannot properly actuate or verify the state of the solenoid that engages the transmission's ParkLock mechanism.

• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• Interim Tier 4 (2012-2015)
• MF 5400 series
• MF 5600 series
• MF 5700 series
• MF 6400 series
• MF 6600 series
• MF 6700 series
• MF 7400 series
• MF 7600 series
• MF 7700 series
• MF 8400 series
• MF 8600 series
• MF 8700 series

1. 1

   Secure the Machine: Because you are diagnosing the parking brake system, ensure the tractor is on flat ground and the wheels are securely chocked before beginning any tests.

2. 2

   Inspect the Harness and Connectors: Locate the ParkLock unit on the transmission. Inspect the main electrical connectors (designated in manuals as TR5, TR6, TR7, and TR8) for corrosion, moisture, or backed-out pins.

3. 3

   Test the Solenoid Circuit: Check the wiring between the Autotronic 5 controller and the Park Brake Activated Solenoid for continuity. Test for a short to ground or a short to +12V power.

4. 4

   Test the Solenoid Coil: Unplug the solenoid and measure the resistance across the coil pins with a multimeter to verify it is within OEM spec and not internally shorted or open.

5. 5

   Check the Switches: The ParkLock unit also houses status and wear switches (e.g., X673, X674). Ensure these switches are operating correctly, as a mechanical bind can sometimes cause the system to cut voltage or log related codes.

1. 1

   Preparation

   Turn off the engine, remove the key, and ensure the wheels are heavily chocked.

2. 2

   Locate the Solenoid

   Locate the ParkLock unit (GPA40) on the transmission housing. The unit features a cover plate with two solenoid valves (typically labeled 21 and 22 in the manual) and two switches.

3. 3

   Removal

   Disconnect the wiring harness connector from the faulty Park Brake Activated Solenoid.

4. 4

   Unscrew the Valve

   Carefully unscrew the solenoid valve from the ParkLock cover plate. Have a shop rag ready, as a small amount of hydraulic fluid may seep out.

5. 5

   Installation

   Lubricate the O-rings on the new solenoid valve with clean hydraulic oil. Thread the new solenoid into the cover plate and tighten to the specified torque.

6. 6

   Reconnection

   Reconnect the electrical harness.

7. 7

   Calibration/Clearing

   Turn the key on, clear the stored P215 fault code using a diagnostic tool, and test the ParkLock engagement/disengagement to ensure the voltage issue is resolved.