200SX L4-1998cc 2.0L DOHC MFI (SR20DE) (1995)
Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor (Revolution Sensor)
VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
The revolution sensor detects the revolution of the idler gear and emits a pulse signal. The pulse signal is sent to the A/T control unit which
converts it into vehicle speed.