Massey Ferguson 00.02.39 – Dash (Instrument Panel): Issue With Signal Voltage From Clutch Pedal Sensor, High Voltage

The controller receives a signal voltage from the clutch pedal position sensor that exceeds the expected maximum threshold (typically above 4.5V). A high voltage reading usually indicates a short circuit to power (+12V), a broken/corroded ground wire, or an internal failure of the potentiometer itself.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7714S
• 7719S
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 5400 Series
• 6400 Series
• 6600 Series
• 7600 Series
• 8600 Series

1. 1

   Visually inspect the clutch pedal sensor (at the base of the clutch pedal assembly), wiring harness, and connector for physical damage, rubbing, or moisture ingress.

2. 2

   Perform a ground circuit test using a multimeter to verify the sensor has a solid ground connection (a lost ground on a 3-wire potentiometer is the most common cause of a high voltage code).

3. 3

   Test the signal wire to ensure it is not shorted to a 12V power source.

4. 4

   Perform a sensor sweep test by back-probing the signal wire with a multimeter. Slowly depress the clutch pedal; the voltage should change smoothly between 0.5V and 4.5V. If it is stuck high or jumps erratically, the sensor has failed internally.

1. 1

   Preparation

   Park the tractor on a flat surface, engage the parking brake, and turn off the ignition.

2. 2

   Removal

   Disconnect the electrical connector from the clutch pedal sensor. Remove the mounting hardware securing the sensor to the pedal linkage.

3. 3

   Installation

   Mount the new sensor in the same orientation, secure the hardware, and plug in the electrical connector.

4. 4

   Calibration

   Warm the transmission oil to at least 50°C (122°F). Ensure the shuttle lever is in Neutral and the hand throttle is at idle. Access the tractor's dashboard service menu (usually by holding the 'A' or 'Menu' button on the dash). Navigate to the Clutch Pedal Calibration screen. Follow the on-screen prompts to fully depress and fully release the clutch pedal. The dash will confirm a successful calibration. (Note: If you cannot access the service menu, a dealer will need to perform this via their diagnostic laptop).