Deutz-Fahr T64 – Transmission Control Unit (TCU) / Shuttle ECU / VDC2: Clutch Pedal Position Plausibility Conflict

The control unit has detected a plausibility conflict regarding the effective position of the clutch pedal. The information received from the clutch pedal position sensor (potentiometer) does not match the state of the clutch pedal depressed sensor (end-of-travel switch).

• Agroplus 310, 320, 410, and 420 Profiline series tractors
• Agrofarm 85
• Agrofarm 100
• Agrofarm 410
• Agrofarm 420
• Agrofarm 430
• Agrotron M620
• Agrotron K420
• Agrotron 106-165 MK3
• Agrotron 6130 TTV
• 5105
• 5110
• R3 Evo 85
• R3 Evo 100
• R3 Evo 110

1. 1

   Inspect the wiring harness and connectors in the clutch pedal compartment for damage, disconnection, or shorts to ground/battery.

2. 2

   Switch on the ignition and measure the voltage between pins 4 and 11 at the VDC2 connector (A4/4). If the voltage is less than 4.5V, the wiring is likely defective.

3. 3

   Using a diagnostic tool (ART or SDF Analyser), monitor the clutch pedal potentiometer signal. It should read 0.8–0.9 V when not depressed, and approximately 4.1 V when fully depressed.

4. 4

   Verify the physical distance between the lever and the sensor is between 0.5 and 1 mm, and check the end float (0.1 to 0.6 mm).

5. 5

   Ensure the clutch pedal depressed switch is functioning and not sticking, as a mechanical failure of this switch will trigger the T64 conflict code even if the potentiometer is fine.

1. 1

   Locate sensor

   Turn off the ignition and locate the clutch pedal potentiometer in the clutch pedal compartment.

2. 2

   Disconnect sensor

   Unplug the electrical connector from the potentiometer.

3. 3

   Remove sensor

   Remove the retaining nuts/bolts and extract the faulty sensor.

4. 4

   Install new sensor

   Install the new clutch pedal potentiometer.

5. 5

   Adjust sensor position

   Adjust the position of the sensor relative to the lever by turning the mounting nuts. Ensure the distance between the lever and the sensor is set to 0.5 - 1 mm.

6. 6

   Reconnect sensor

   Reconnect the electrical connector.

7. 7

   Verify and calibrate voltage

   Turn on the ignition and use the ART or SDF Analyser diagnostic tool to verify the voltage readings. Adjust the bolt if necessary to achieve 0.8-0.9V (released) and 4.1V (depressed).

8. 8

   Clear fault code

   Clear the T64 fault code from the TCU memory and test the tractor's shuttle and clutch operation.