The clutch is located between the engine and the transmission. When the clutch is engaged, the friction disk is clamped tightly between the flywheel and the pressure plate inside clutch cover assembly. And the friction disk turns with the flywheel. When the driver pushes down the clutch pedal, the friction disk moves away from the flywheel by the clutch fork. So, no torque can flow through the clutch and gears can be shifted safely and easily. The ECM senses the state of clutch through clutch switch(A).