Massey Ferguson 04.2.04 – Transmission Module (TRANS): Issue With Signal Voltage From Clutch Pedal Sensor

The controller is receiving an abnormal electrical signal from the clutch pedal potentiometer (often designated as component X68). The voltage is likely reading out of its expected range (either too high, too low, shorted to +12V, or an open circuit), which prevents the tractor from accurately determining the clutch pedal's physical position.

• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5400 Series
• 5600 Series
• 5700 Series
• 5608-5613
• 5710SL-5713SL
• 6100 Series
• 6200 Series
• 6400 Series
• 6600 Series
• 7400 Series
• 7600 Series
• 7700 Series
• 7714-7726 Tier 4 models
• 8200 Series
• 8400 Series
• 8600 Series
• 4700 Series
• 4200 Series
• 4300 Series
• 6700 S

1. 1

   Inspect the clutch pedal linkage and the sensor fork for physical damage, binding, or a disconnected linkage arm.

2. 2

   Inspect the wiring harness leading to the clutch pedal sensor for rubbed-through wires, corrosion in the connector pins, or a loose connection that could cause an open circuit or a short to +12V/Ground.

3. 3

   Perform a voltage sweep test using a multimeter to verify the reference voltage at the sensor connector. Back-probe the signal wire and slowly depress the clutch pedal; the voltage should sweep smoothly without dropping out or spiking. Erratic signals indicate internal wear.

1. 1

   Power Down

   Turn off the tractor and disconnect the battery to prevent electrical spikes during the repair.

2. 2

   Locate the Sensor

   Locate the clutch pedal potentiometer (X68) mounted at the pivot point or base of the clutch pedal assembly in the cab.

3. 3

   Remove the Faulty Sensor

   Disconnect the electrical harness connector. Remove the retaining screws/bolts and carefully detach the sensor fork/linkage from the pedal assembly.

4. 4

   Install the New Sensor

   Mount the new OEM clutch pedal sensor, ensuring the linkage or fork is properly aligned with the pedal's pivot mechanism. Secure the mounting hardware and reconnect the electrical harness.

5. 5

   Calibrate the Sensor

   You must perform a clutch pedal sensor calibration after replacement via the tractor's instrument panel (DOT Matrix keyboard) or a dealer diagnostic tool so the transmission module can learn the new minimum and maximum voltage values for the pedal's end-stops.

6. 6

   Clear Codes

   Clear the 04.2.04 DTC from the Transmission module and test drive the tractor to ensure smooth shuttle shifting and clutch engagement.