DTC P0704: Clutch Pedal Switch: Description
WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
The clutch pedal position switch is a normally closed switch. The Powertrain Control Module (PCM) applies a voltage to the clutch pedal position switch circuit. When the clutch pedal position switch is depressed, the circuit is open and the PCM senses a high voltage. When the clutch pedal position switch is released, the clutch pedal position switch contacts close, causing the applied voltage to go low. The PCM determines if the clutch pedal position switch has failed by not sensing a clutch switch transition. The PCM monitors vehicle speed from 0 to a predetermined speed.