Valtra A315 – AC 5: Clutch Pedal Position Sensor Signal Deviation

When the clutch pedal is pressed, the signal from the clutch pedal position sensor (B16) deviates by 0.5 V (DC) from its previously calibrated value. This deviation must persist for more than one second to register as a fault. It indicates an inconsistency in the sensor's output during clutch pedal operation, which is monitored by the AC 5 control unit.

• 6000 Series
• T Series
• T130
• T Series Versu
• N Series
• N175 Direct
• N154
• A Series
• A4
• A4S
• A124
• S Series

1. 1

   Review the tractor's fault code memory to see if other related codes, such as A314, are present

2. 2

   Check battery condition and voltage, as a low battery voltage during engine start can cause this fault (ensure the correct starting procedure is followed: depress clutch pedal first, then start engine)

3. 3

   Inspect the clutch pedal limit switch (S9) adjustment using the tractor's test mode (display should show a value between 03 and 08 when the pedal is lifted to the switch-on point)

4. 4

   Test the position sensor (B16) using the built-in test mode and inspect the sensor's mounting, the lever on the sensor spindle, and associated wiring for damage or looseness

5. 5

   Measure the sensor's output voltages directly to confirm a fault before attempting recalibration

1. 1

   Perform initial diagnostics

   Complete all diagnostic checks to rule out simple issues like a low battery or incorrect switch adjustment.

2. 2

   Calibrate the clutch pedal position sensor

   Recalibrate the clutch pedal position sensor (B16) via the tractor's onboard diagnostic system. Note: This clutch pedal calibration must be performed before attempting other automatic calibrations, such as those for the shuttle or PTO clutches.

3. 3

   Inspect and clean connections

   If calibration fails or the fault persists, inspect the electrical connectors for the B16 sensor. Clean any oxidation or contamination on the contacts, which is common on machines operating in wet environments.

4. 4

   Replace the clutch pedal position sensor

   If the sensor is determined to be faulty through voltage checks or if calibration repeatedly fails, replace the B16 sensor. After installation, the new sensor must be calibrated.