Jim Grant's Tech Tips
90 Honda Accord, What’s a VSS?
The other day during a quick acceleration in my 90 Honda Accord, the speedometer quit working, my check engine light came on, and my sport shift light started flashing. My mechanic said that it is the VSS. What is the VSS and what’s involved replacing it?
The VSS is the Vehicle Speed Sensor. The VSS creates an electrical signal that is used by the vehicle’s computer for engine and transmission management (if equipped with an automatic transmission). The signal from the VSS is also used by the speed-o-meter to determine vehicle speed and distance traveled. Knowing this you can understand why the check engine light and sport shift light (for the transmission) are complaining. Of course the speed-o is not operating as well. The VSS is located at the rear for the transmission and has a 3-wire connector plugged into it. Only 2 small bolts hold it in place and it is not that hard to change. Word of caution, there is this little piece called a drive link that is driven by the transmission and goes into the VSS. The little bugger is easy to lose and a replacement is hard to get.