Massey Ferguson 04.X.04 – Transmission Control Module (TRANS / TCU): Issue With Signal Voltage From Clutch Pedal Sensor (TRANS)

The controller is receiving an erratic, out-of-range (too high or too low), or missing electrical voltage signal from the clutch pedal position sensor (often designated as sensor X68 or the Bottom of Clutch switch). This can cause harsh or jumpy clutch engagement, inconsistent direction selection, or a complete loss of drive.

• 4710
• 7724S
• 5712SL
• 7722S
• 7722
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 4708
• 7726S
• 4707
• 4709
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4700 series
• 5700 series
• 6700 series
• 7700 series
• 7714-7726S Tier 4
• 8600 series
• 5400 series
• 6100 series
• 6200 series
• 6400 series
• 7400 series
• 8200 series
• 8400 series

1. 1

   Locate the clutch pedal sensor inside the pedal box and inspect the wiring harness and connector for corrosion, broken wires, or a short circuit to +12V or ground.

2. 2

   Attempt a clutch pedal calibration, especially on newer models, as the pedal's voltage sweep may have simply drifted out of learned parameters.

3. 3

   Check the sensor's voltage sweep with a multimeter or diagnostic tool to verify if it has dead spots or is stuck open.

1. 1

   Access the Sensor

   Remove the lower dash/pedal box trim panels inside the cab to access the clutch pedal linkage.

2. 2

   Disconnect

   Unplug the electrical harness connector from the clutch pedal sensor / BOC switch.

3. 3

   Remove

   Unbolt or unclip the faulty sensor/switch from the pedal bracket assembly.

4. 4

   Install

   Mount the new OEM clutch pedal sensor into the bracket and ensure it properly aligns with the pedal linkage.

5. 5

   Reconnect

   Plug the electrical harness back into the sensor.

6. 6

   Calibrate

   Turn on the tractor and perform a transmission/clutch calibration procedure.