RIDE HEIGHT ADJUSTMENT (FRONT)
- Turn ignition on. Connect New Generation Star (NGS) tester (007-00500) to Data Link Connector (DLC). DLC is located under steering column. Select proper vehicle, year and engine type.
- Select 4WAS-AIR SUSP/EVO (4x2 and 4x4) module. On NGS tester, trigger through warning message and reset FRONT and REAR by turning from OFF to ON. On later version NGS tester, only reset FRONT.
- Back out torsion bar adjuster bolt 1.57" (40 mm). Fully deflate front air shock absorbers. See «INFLATING/DEFLATING AIR SUSPENSION SYSTEM»(ref-1319-S03459766222000031300000).
- Raise vehicle on hoist with frictionless plates to support front wheels. Measure distance between center of lower control arm front bolt and ground (STEP 1). (Scheme 1) Measure distance between bottom of steering knuckle and ground (STEP 2). Subtract smaller measurement from larger measurement. This is ride height measurement. Ride height should be 2.99-3.22" (76-82 mm). If ride height is not as specified, tighten or loosen torsion bar adjusting bolt as required.
- After mechanical ride height adjustment is complete, select SAVE CALIBRATION VALUES under ACTIVE COMMAND MODES menu. Trigger through warning message and save FRONT by turning from OFF to ON.
Scheme 1
RIDE HEIGHT ADJUSTMENT (REAR)
Note. Rear ride height adjustment procedure is same on 4WD and 2WD applications.
- Turn ignition on. Connect New Generation Star (NGS) tester (007-00500) to Data Link Connector (DLC). DLC is located under steering column. Select 1997 4.6L/5.4L Expedition 4WAS module.
- Measure rear ride height on driver's side between bottom of frame to rear jounce bumper bolt at rear side of head base. (Scheme 2)
- Using NGS tester, select ACTIVE COMMAND MODES. Raise or lower vehicle by using active command LIFT_REAR or VENT_REAR as necessary. Adjust rear ride height to 5.8" (146.8 mm). See «INFLATING/DEFLATING AIR SUSPENSION SYSTEM»(ref-1319-S03459766222000031300000).
- On right side of NGS tester screen, monitor rear height sensor voltage. Loosen rear height sensor ball stud nut on track bar. Adjust height sensor up or down until 2.58-2.64 volts is indicated. Tighten ball stud nut.
