Massey Ferguson T6105 – Transmission Control Module (TRANS1): Issue With Rear PTO Clutch Speed Sensor Signal

The system specifically flags a signal error originating from the X15 PTO clutch speed sensor. This code triggers when the controller detects an invalid signal, a sensor supply voltage error, or a mechanical discrepancy—such as a difference of at least 12% to 20% between the PTO clutch speed and the engine/output shaft speed, which often indicates that the PTO clutch disc is slipping or failing to separate.

• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 7615
• 7620
• 7616
• 7618
• 7619
• 7626
• 7624
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• 8650
• 8660
• 8670
• 8680
• 8690
• 8480

1. 1

   Inspect the wiring harness and connector for the X15 PTO clutch speed sensor for corrosion, breaks, or loose pins

2. 2

   Verify the sensor supply voltage to the X15 sensor, as a voltage drop or short will trigger the T6105 signal error

3. 3

   Check for mechanical slippage by verifying if the PTO clutch disc is slipping under load, or if the PTO brake is failing to engage the selected speed

4. 4

   Ensure the speed solenoid valves (X3, X4) are not locked in the deactivated position or incorrectly connected, which can cause secondary speed reading errors

1. 1

   Power down the tractor and engage the ParkLock.

   Power down the tractor and engage the ParkLock.

2. 2

   Locate the X15 PTO clutch speed sensor on the rear transmission/PTO housing.

   Locate the X15 PTO clutch speed sensor on the rear transmission/PTO housing.

3. 3

   Disconnect the electrical harness from the sensor.

   Disconnect the electrical harness from the sensor.

4. 4

   Unthread and remove the faulty X15 sensor from the housing.

   Unthread and remove the faulty X15 sensor from the housing. Have a catch pan ready in case of minor hydraulic oil seepage.

5. 5

   Install the new OEM PTO speed sensor and tighten to the manufacturer's torque specification.

   Install the new OEM PTO speed sensor and tighten to the manufacturer's torque specification.

6. 6

   Reconnect the electrical harness.

   Reconnect the electrical harness.

7. 7

   Clear the fault code using the Massey Ferguson EDT (Electronic Diagnostic Tool) or via the dash control center keypad.

   Clear the fault code using the Massey Ferguson EDT (Electronic Diagnostic Tool) or via the dash control center keypad.

8. 8

   Start the engine and engage the PTO to verify the speed signal is reading correctly and the code does not return.

   Start the engine and engage the PTO to verify the speed signal is reading correctly and the code does not return.