Read this first
Warning/Indicator Lights and Warning Sounds
Speed Limiter Warning Beep (Some Models)
If the vehicle speed exceeds the set speed by about 3 km/h (2 mph) or more, a warning beep operates continuously. The warning beep operates until the vehicle speed decreases to the set speed or less.
If the set speed is set lower than the current vehicle speed by pressing the SET 
or RESUME/
switch, the warning beep is not activated for about 30 seconds even if the vehicle speed is faster than the newly set speed by 3 km/h (2 mph). Be careful not to drive over the set speed.
When the system is temporarily cancelled by depressing the accelerator pedal fully, the adjustable speed limiter (ASL) display shows the cancel display. If the vehicle speed exceeds the set speed by about 3 km/h (2 mph) or more while the cancel display is displayed, the set speed display flashes but the warning sound is not operated.
