Vehicle Speed Sensor (VSS)
A 12 volt signal fed to VSS by ECM is turned on and off as rear wheels turn. On and off rate of VSS varies proportionally with vehicle speed and allows ECM to control output emission control components.
A 12 volt signal fed to VSS by ECM is turned on and off as rear wheels turn. On and off rate of VSS varies proportionally with vehicle speed and allows ECM to control output emission control components.