Ride Height Sensor: Adjustments

Use the following procedure in order to manually adjust the load leveling height sensor in-trim zone:
1. Load 250-300 lbs. in the rear of the passenger compartment (enough load to activate the compressor), distributed evenly from left to right.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle. Ensure that the vehicle is roughly level and supported by the rear wheels or axle.

NOTICE: When diagnosis or repair requires raising the vehicle on a hoist, it is important that the rear axle remains in the normal trim height position at all times. Therefore, the hoists should support the rear wheels or axle housings. Use two additional jack stands to support the rear axle when a frame contact hoist is used or damage to the auto level control air compressor could occur.

3. Inspect the load leveling height sensor (5) for damage. Ensure that the load leveling height sensor link is properly connected to the rear differential bracket and load leveling height sensor arm (1).
4. Turn the ignition switch to RUN and then to OFF. Wait for approximately one minute for the Air Replenishment Cycle to complete.
5. Measure the D dimension at the rear axle (2) on both the right and the left hand side. Refer to Trim Height Inspection Procedure in Suspension General Diagnosis.
6. The average D dimension should be 130.8 to 148.11 mm (5.1 to 5.8 inch) (3). If the average D dimension is within this range, do not adjust the load leveling height sensor (5). If the D dimension is not within this range, adjust the automatic level control sensor (5) as follows:
6.1. Loosen the load leveling height sensor arm adjustment bolt (4).
6.2. In order to raise the vehicle, move the plastic portion of the load leveling height sensor arm (1) upwards. In order to lower the vehicle, move the plastic portion of the load leveling height sensor arm (1) downwards. Rotating the plastic portion of the load leveling height sensor arm (1) one degree will change the D dimension by 4 mm (0.16 inch).

NOTICE: Refer to Fastener Notice in Service Precautions.

6.3. Tighten the load leveling height sensor arm adjustment bolt (4).
- Tighten the load leveling height sensor arm adjustment bolt (4) to 5 Nm (44 inch lbs.).
6.4. In order to verify that the load leveling height sensor (5) is adjusted properly, repeat steps 4 through 6.