CLAAS 75CFh – TR1: Clutch Pedal Sensor Voltage Out of Range

The voltage signal provided by the clutch pedal position sensor (R71) is outside the acceptable operating range (less than 0.3 V or greater than 4.8 V). This triggers a fault to be logged in the transmission control module. As a safety response, the system may deactivate the Hexactiv automatic powershift function and limit the engine speed to idle.

• Arion 640-510 Series
• Arion 400 Series
• Arion 500 Series
• Arion 600 Series
• Axion 800 Series
• Axion 900 Series

1. 1

   Identify the Component: The fault code corresponds to the clutch pedal position potentiometer (R71), an electronic device located near the clutch pedal.

2. 2

   Inspect Wiring and Connectors: Check the connectors and wiring harness between the clutch pedal sensor (R71) and the TR1 (A57-1) transmission module for any signs of damage, corrosion, looseness, open circuits, or short circuits.

3. 3

   Test the Sensor: Using a multimeter, test the sensor's output signal. A normally functioning sensor will show a variable resistance or voltage as the pedal is depressed. If the voltage is fixed, absent, or remains outside the 0.3 V to 4.8 V range throughout the pedal's travel, the sensor is likely faulty.

4. 4

   Check for Other Codes: Analyze any other active fault codes, as one error can sometimes generate another.

1. 1

   Locate the sensor

   Find the clutch pedal position potentiometer (R71) on the clutch pedal assembly, typically accessible from within the cab behind a lower dash panel.

2. 2

   Remove the faulty sensor

   Disconnect the electrical connector from the sensor and remove the nuts and bolts securing it to the pedal bracket.

3. 3

   Install the new sensor

   Mount the replacement sensor in the exact position as the old one and securely fasten it to the bracket.

4. 4

   Reconnect and calibrate

   Reconnect the electrical connector. Perform a calibration procedure if required by the system to ensure the controller recognizes the new sensor's voltage range for fully released and fully depressed positions.

5. 5

   Clear codes and test

   Clear all fault codes from the transmission module and test the tractor's operation to ensure the fault does not reappear.