S2000 L4-1997cc 2.0L DOHC (VTEC) MFI (2001)
Camshaft Position Sensor: Description and Operation
Camshaft Position (CMP Sensor (Top Dead Center (TDC) sensors)
The CMP A/B (TDC 1/2) sensor determines ignition timing at start up (cranking) and when crank angle is abnormal.