Impulse Hatchback L4-1809cc 1.8L DOHC (4XF1-W) (1992)
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Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor (VSS)
Vehicle Speed Sensor
Vehicle Speed Sensor is an integral part of speedometer assembly. ECM applies and monitors a 12V signal to sensor. When drive wheels are turning,
sensor alternately grounds circuit, creating a pulsing action that occurs 4096 times per mile. ECM calculates vehicle speed based on time between
pulses. This input is used by ECM for idle air and fuel control calculations.
