Massey Ferguson 4.02.9D – TRANS2: Transmission Input Shaft Speed Sensor Calibration Fault

The sensor reading the rotational speed of the transmission input shaft is providing an erratic signal, is out of calibration, or the speed signal does not match expected parameters.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613 iT4
• 5713SL T4
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• 6400 Series
• 6600 Series
• 6700 Series
• 7600 Series

1. 1

   Check the wiring harness and connector for damage, corrosion, or moisture intrusion

2. 2

   Verify the sensor gap relative to the internal tone ring is correct

3. 3

   Inspect the tone ring for damage or debris that could cause a calibration or signal mismatch fault

1. 1

   Preparation

   Disconnect the tractor's battery before starting any electrical work.

2. 2

   Locate the Sensor

   Locate the transmission input shaft speed sensor on the transmission housing. Access can sometimes be tight, so ensure you have the correct low-profile tools.

3. 3

   Clean the Area

   Thoroughly clean the mounting area around the sensor before removal to prevent dirt or debris from falling into the transmission housing.

4. 4

   Remove and Replace

   Unplug the electrical connector, unbolt the faulty sensor, and carefully extract it. Install the new sensor, ensuring it is seated properly and the O-ring/seal is intact to prevent moisture intrusion.

5. 5

   Reassembly

   Reconnect the wiring harness and reconnect the battery.

6. 6

   Calibration

   Because this is a 'Calibration Fault' (4.02.9D), calibration via the tractor's diagnostic system is typically required after installation to ensure proper operation and clear the code.