Vehicle Speed Sensor Signal: Description and Operation
Speed signalThe EDC control unit receives its speed signals from the front left wheel speed sensor of the ABS system.
From this speed sensor, the signal is transferred to the ABS control unit which in turn sends the signal to the EDC control unit. The speed signal received by the EDC control unit is a square-wave signal (0 to 12 VOLT).
The corresponding cornering speed/lateral acceleration is calculated on the basis of the measuring variables vehicle speed and steering wheel angle.
Calculating the change in vehicle speed renders a longitudinal [1][2]acceleration sensor unnecessary.