Sidekick 4 Door 4WD L4-18L DOHC MFI 16V (1996) Vehicle Speed Sensor Description
Vehicle Speed Sensor: Description and Operation
The speed sensor consisting of the reed switch and magnet is built in the speedometer. As the magnet turns with the speedometer cable, its
magnetic force causes the reed switch to turn ON and OFF. Such ON/OFF frequency increases or decreases in proportion with the vehicle speed
and is sent to ECM as pulse signals.
ECM uses it as one of the signals to control various devices.
