Vehicle Speed Sensor: Description and Operation

VSS

Description
The vehicle speed signal is sent to the unified meter and A/C amp. from the VDC/TCS/ABS control unit (models with VDC) or ABS actuator and electric unit (control unit) (models without VDC) by CAN communication line. The unified meter and A/C amp. then sends a signal to the ECM by CAN communication line.

ECM receives two vehicle speed signals via CAN communication line. One is sent from VDC/TCS/ABS control unit (models with VDC), ABS actuator and electric unit (models without VDC) via "unified meter and A/C amp.", and the other is from TCM (Transmission control module). ECM uses these signals for engine control.