Speed Sensor

Speed sensors are located in combination meter and/or on extension housing of Electronically Controlled Transmission (ECT) or M/T. Speed sensor rotor shaft is driven by a gear on speedometer output shaft. For each shaft rotation, speed sensor sends a 20-pulse signal to instrument cluster. This signal is converted inside instrument cluster to a 4-pulse signal which is sent to CC ECU. CC ECU calculates vehicle speed from this pulse frequency.