Start Up Cycle

When the ignition is turned on, a popping sound and a slight brake pedal movement may be noticed. Additionally, when the vehicle is first driven off a humming may be heard and/or felt by the driver at approximately 20 to 40 kph (12 to 25 mph). The ABS warning lamp will also be on for up to 5 seconds after the ignition is turned on. All of these conditions are a normal function of ABS as the system is performing a diagnosis check.