Combination Meter: Speedometer: Operation
The ABS or VDC control module calculates the vehicle speed based on signals from the four wheel speed sensors and sends vehicle speed signals (4 pulses per rotation of wheel) to the speedometer drive circuit and odometer/trip meter drive circuit in the speedometer.
NOTE:
Signals from the ABS or VDC control module are also used by the engine control module, automatic transmission control module, etc.