Civic Sedan L4-1590cc 1.6L SOHC (D16A6) MFI (1990)
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Vehicle Speed Sensor: Description and Operation
The Vehicle Speed Sensor, mounted on the instrument cluster circuit board, generates 4 pulses (switch closures to ground) for each revolution of the
speedometer cable. This reference is used by the ECU for the EVAP purge control solenoid valve, as well as automatic transmission lock-up control.
