Connect switch AD-266 between the wiring and the ABS sensor.Insert the diagnostic equipment probes in bushes 1 and 2 of the adapator.After the diagnostic equipment has been switched on, enter the "INSTRUMENT" ambient.Under the "VOLTMETER" function select 20V as the end of scale and 2 seconds as the basic time.Manually rotate the wheel and when the speed is 4-6 km/h press the START button.Check that the signal acquired looks the one illustrated without "holes".Regular signal between sensor-flywheel (Rotation speed: 4-6 km/h).Irregular signal due to the presence of metal slag (point X) on the flywheel magnetic race (Rotation speed 4-6 km/h).Irregular signal due to the presence of metal slag (point X) on the flywheel magnetic race (Rotation speed 4-6 km/h).Irregular signal for wheel rotating after Start.