Massey Ferguson 4.X.6C – TRANS1: Issue With Range 2 Engaged Switch Signal

The transmission controller has detected an inconsistency or signal error from the Range 2 position sensor (L57). This occurs if the controller detects a short circuit (often to 0V), an open circuit, a supply voltage error, or if the switch state does not match the commanded state of the Range 2 solenoid valve.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5410
• 5420
• 5425
• 5435
• 5445
• 5455
• 5460
• 5465
• 5470
• 5480
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5708
• 5709
• 5710
• 5711
• 5712
• 5713
• 6445
• 6499
• 6612
• 6616
• 6711
• 6718
• 7614
• 7626
• 7714
• 7726
• 8670
• 8690
• 8727

1. 1

   Inspect the L57 Range 2 position sensor 2-pin connector on the transmission housing for moisture, corrosion, or backed-out pins.

2. 2

   Test voltage and continuity on the sensor harness (Pin 1 supply 12V/8.5V, Pin 2 signal return) for open circuits or a short to ground (0V).

3. 3

   Verify mechanical and hydraulic operation to ensure the Range 2 solenoid valve is actually actuating hydraulically.

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, and turn off the engine.

2. 2

   Locate the Sensor

   Access the side of the transmission housing where the range selector rails and limit switches are located. Identify the L57 switch (Range 2).

3. 3

   Removal

   Disconnect the 2-pin electrical harness from the sensor. Unscrew the faulty limit switch from the transmission housing.

4. 4

   Installation

   Fit the new Range 2 position sensor along with its sealing washer/O-ring.

5. 5

   Torque

   Carefully thread the new switch in and tighten to a maximum of 5 Nm to avoid damaging the sensor body or the selector rail interface.

6. 6

   Reconnection & Clearing

   Reconnect the electrical harness. Turn the ignition on and use the tractor's dashboard menu or an AGCO diagnostic tool (EDT/Wintest) to clear the saved error codes.

7. 7

   Test

   Perform a test drive, shifting through all ranges to ensure Range 2 engages smoothly and the code does not return.