October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Vehicle Speed Sensor (VSS)

This sensor monitors vehicle speed and generates a signal for the PCM. Sensor produces 4 pulses (switch closures to ground) per revolution of the speedometer cable. PCM uses input from this sensor to calculate timing and fuel injection.