Beretta L4-138 2.3L DOHC QUAD 4 HO MFI VIN A (1994)
Vehicle Speed Sensor: Component Tests and General Diagnostics
Circuit Operation
The Vehicle Speed Sensor is a gear-driven Permanent Magnet Generator housed in the vehicle's transaxle. This sensor generates a sine wave output with
a frequency proportional to vehicle speed. The ECM converts this signal to an output that is switched to ground at a frequency of 4000 pulses per mile
at the DK GRN/WHT (817 CKT) wire output. This output is pulled up to 5 volts or greater by the components that use this speed signal as an input.
System Diagnosis
Refer to the Symptom Table for the appropriate diagnostic procedures. See: Symptom Related Diagnostic Procedures/- Symptom Table
