Affect of Road Undulation

^ The 30-second averaging interval is used to keep the control module from making unneeded corrections.
^ When a vehicle at the correct trim height hits a bump, the air suspension height sensor output will read low and high in addition to trim until the oscillations die out.
^ If the control module were to correct for these "bump induced readings," the system duty cycle would increase unnecessarily.
^ The 30-second averaging interval not only eliminates corrections due to bumps, but also eliminates unneeded corrections resulting from braking, accelerating, and turning.
^ The control module tabulates the height sensor readings and does not begin a compress or vent operation until the air suspension height sensor reads low or high for 30 seconds continuously.