Ride Height Sensor: Service and Repair

Fig. 12 Replacing height sensor:

Front
1. Turn air suspension switch to ``Off'' position.
2. Working from engine compartment, disconnect sensor electrical connector.
3. Push connector through access hole at rear of shock tower, then raise and support vehicle.
4. Disconnect bottom and top ends of sensor from attaching studs as shown, Fig. 12.
5. Disconnect wiring harness from plastic clips on shock tower and remove sensor.
6. Reverse procedure to install.
Rear
Whenever the front air springs have been replaced, always check rear height sensor for damage. Replace, if necessary.
1. Turn air suspension switch to ``Off'' position.
2. Working from luggage compartment, disconnect sensor electrical connector. Pull luggage compartment carpet back to gain access to sensor sealing grommet.
3. Raise and support vehicle, then disconnect bottom and top ends of sensor from the attaching studs, Fig. 12.
4. Pushing upwards, unseat sensor from grommet, then push sensor through floor pan into luggage compartment.
5. Reverse procedure to install.

Fig. 4 Air suspension switch & diagnostic pigtail location:

AIR SPRING REFILL
1. With suspension unloaded, turn air suspension switch to ``On'' position.
2. Install battery charger to minimize battery drain.
3. With driver's door open, cycle ignition from Off to Run position. Hold in Run for approximately 5 seconds, then return ignition to Off.
4. Ground the diagnostic pigtail, Fig. 4, then with driver's door open and brakes applied, turn ignition to Run position. The warning lamp will blink continuously, indicating the spring refill sequence has been entered.
5. To fill the rear spring(s), close, then open the driver's door once. After a 6 second delay, the spring(s) will be filled for approximately 1 minute.
6. To fill the front spring(s), close and open the driver's door twice. After a 6 second delay, the spring(s) will be filled for 1 minute.
7. If both front and rear springs are to be filled, fill the rear springs first, then open and close the driver's door once to initiate front spring filling.
8. To terminate the fill procedure, turn the ignition switch off, apply the brakes or disconnect the diagnostic pigtail.
9. Lower vehicle and start engine with all doors closed to allow vehicle to level to trim height.