Massey Ferguson 13.01.2F – TRANS1: Issue With Park Lock Proximity Switch On The Axle Dyna VT (TRANS1)

The transmission control system is detecting an irregular signal, open circuit, or out-of-range voltage from the proximity switch responsible for monitoring whether the mechanical park lock on the rear axle is engaged or disengaged.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 6612
• 6613
• 6614
• 6615
• 6616
• 7465
• 7475
• 7480
• 7485
• 7490
• 7495
• 7497
• 7499
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714 through 7726
• 8450-8480
• 8650-8690

1. 1

   Inspect the wiring harness leading to the rear axle where the park lock proximity switch is located for chafed wires, short circuits to earth, or damaged pins at the connector.

2. 2

   Verify the connections at the Autotronic 5 ParkLock controller harness, as communication issues here can trigger park lock faults.

3. 3

   Check the proximity switch operation using a pilot lamp or a multimeter to verify if the sensor successfully changes state (open/closed or voltage shift) when the park lock is physically engaged and disengaged via the cab controls.

1. 1

   Locate the Switch

   Locate the park lock proximity switch on the rear axle housing.

2. 2

   Disconnect

   Carefully unplug the electrical connector from the proximity switch.

3. 3

   Remove the Faulty Switch

   Unthread or unbolt the proximity switch from the axle housing.

4. 4

   Install the New Switch

   Thread the new proximity switch into the axle. If it is an adjustable proximity sensor, ensure it is set to the correct depth/clearance so it can accurately detect the park lock mechanism without being struck by moving internal components.

5. 5

   Reconnect and Clear

   Reconnect the wiring harness. Turn on the tractor and use a diagnostic tool to clear the 13.01.2F fault code from the TRANS1 module. Test the park lock engagement to ensure the code does not return.