Most high-performance clutches are operated automatically during gear changes. The Powertrain Control Module (PCM) operates the clutch and gearshift. However, the driver activates them manually from the steering wheel when moving from a standstill at the start of the race. During the race, the driver also performs gear changes by pressing a button located on the steering wheel.
The Clutch Position Sensor (CPS) circuit controls the manual transmission clutch. It makes this process by reading the output voltage from the sensor, which indicates when the clutch is engaged. This sensor is an on/off switch that is mounted near the clutch pedal. The voltage is present on the side of the sensor. Therefore, it causes the contacts to close when the clutch transfer voltage is coupled to the starter solenoid. This circuit prevents the engine from starting before the clutch is engaged.
If the PCM notices that the CPS Sensor circuit voltage or resistance is not within the allowable parameters, the diagnostic code P0805 OBDII will be stored.