John Deere 522379.11 – PTA / TCU: Park Lock Solenoid Valve 2, Malfunction

Generated when the control software reports a malfunction with the park lock solenoid valve 2 (Y15/2) via the CAN BUS. The system typically limits or completely disables the function of the park lock to prevent transmission damage, placing the machine into a protective 'come-home' or limited operational mode.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230
• 6330
• 6430
• 6010
• 6110
• 6210
• 6310
• 6410
• 6510
• 6610
• 6810
• 6910
• 6220
• 6320
• 6420

1. 1

   Check for Priority PLC Codes: Access the diagnostic menu and check the PLC (Rear Chassis Module) for related codes. If the PLC is reporting an open circuit (e.g., PLC 328021.31) or a short to ground (e.g., PLC 328020.31), address that specific electrical fault first.

2. 2

   Inspect Wiring and Connectors: Visually inspect the wiring harness, ground lead, and connectors leading to the Y15/2 park lock solenoid valve. Look for breaks, corrosion, or loose pins.

3. 3

   Test the Solenoid Valve (Y15/2): Use a multimeter to measure the current flow and resistance at the signal input of the park lock solenoid valve. Compare the draw against OEM specs to determine if the coil is shorted or open.

4. 4

   Check CAN BUS Communication: Ensure the CAN BUS communication lines between the PLC and the PTA/TCU are intact and not damaged.

1. 1

   Power Down

   Turn off the tractor, remove the key, and engage the manual park lock release if the tractor needs to be moved or towed safely into a shop bay.

2. 2

   Access the Valve Block

   Locate the IVT transmission valve block where the park lock solenoids (Y15/1 and Y15/2) are housed.

3. 3

   Repair Wiring (If Applicable)

   If the multimeter test revealed an open circuit or short to ground in the harness, repair the broken wire or replace the damaged connector terminal. Ensure the circuit is properly grounded.

4. 4

   Replace the Solenoid (If Faulty)

   If the wiring is intact but the solenoid fails the multimeter test (incorrect current draw): Disconnect the electrical connector from the Y15/2 solenoid. Unbolt/unscrew the faulty park lock solenoid valve from the transmission block. Lubricate the O-rings on the new solenoid valve with clean transmission hydraulic fluid. Install the new solenoid valve and torque to OEM specifications. Reconnect the electrical harness.

5. 5

   Clear Codes and Calibrate

   Turn the key on, clear the stored PTA and PLC diagnostic codes, and start the tractor. Test the park lock engagement and disengagement to ensure the mechanical and electrical functions are restored.