Ride Height Adjustments (Vehicle Dynamic Suspension)

Ride Height Adjustments

Special Tool(s):

WARNING: Do not remove an air spring under any circumstances when there is pressure in the air spring. Do not remove any components supporting an air spring without either exhausting the air or providing support for the air spring. Failure to follow these instructions may result in personal injury

CAUTION: The suspension height D dimensions are for reference only. The vehicle attitude must be controlled by the correct dimensions to prevent vehicle damage.

NOTE: Improper air suspension ride height D dimension can be caused by an air suspension system that is incorrectly set.

1. Position the vehicle on a level surface over an open repair pit.
2. Open the luggage compartment and verify that the air suspension switch is in the ON position.
3. Turn the ignition switch to the RUN position and wait at least 2 minutes.





4. Position the special tool on the rear axle.





5. Measure the ride height D dimension.
1 Release the set screw.
2 Pull the sliding post and scale up until it touches the bottom of the inboard frame rail and lock the set screw.
3 Measure the ride height D dimension.





6. If ride height dimension D is not within specification, use the diagnostic tool to vent or fill the air suspension to the correct dimension.
7. Using the diagnostic tool, monitor the suspension height sensor voltage PID.





8. Loosen the height sensor bracket nuts.





9. Slide the bracket until the height sensor voltage PID is equal to 2.80 volts.
10. Tighten the height sensor bracket nuts to 11 Nm (8 ft. lbs.).