TTEC 4825 Testing Speed sensors on road, Nissan "Cefiro"

                                     
                                           Speed Sensors on road
                               
                                Nissan "Cefiro" 1996  72000 km

                           Speed is 14 km, signal from 4 sensors are same

Four Channel, Four Sensor ABS - This type of the ABS use a speed sensor on each wheel and

 separate valve for all the four wheels. Maximum braking force is achieved with this type.

             Front speed sensors shows 34 km, rear sensors shows 32 km.
I think, front wheel drive car, in axeleration position of pedal, starts to pull a car forward.
                       This occurs a little loos traction front wheels.

Without axeleration in casual drive, speed sensors shows same speed.
Front-40 km, Rear LH - 40 km, Rear RH - 39 km (small diferent is normal)

                                                           Turn left
                                    The controller monitors the speed sensors at all times. 
                  We can see FR LH and Rear RH - 63 km, FR RH -64 km, RR LH - 62 km

This detailed test show how accurately the speed sensors work when the car is on the move.

Speed sensors monitor the speed at which the vehicle is travelling by sending out precise signals to an Electronic Control Unit.

When the car makes a turn both sides of the car give out a slight difference in speed as monitored by the Scanner.