System Operation Check

The system operation check is to check for proper active suspension system operation. The active suspension system has three functions: a function that changes control pressure for all four wheels at the same time, a function that changes it for any one wheel, and a function that activates the fail-safe valve.
Extreme care should be taken when conducting system operation checks since the vehicle moves up and down greatly.






All Wheel Vibration

1. After completing Oil Leak Check, using CONSULT tool, touch NEXT. Display will then show ``10. VIBRATE ALL WHEELS.''
2. Before conducting all wheel vibrator check, ensure vehicle is placed on flat surface with engine idling.
3. Ensure there are no obstacles which may hamper up-down vehicle movement.
4. Release parking brakes to eliminate friction which may occur during vehicle height changes. Ensure gear selector is set to ``P'' and foot brake is released.

Fig. 40 All Wheel Vibration Control Pattern:

5. Touch START on CONSULT. Display will now show control pattern shown in Fig. 40 and all four wheels will vibrate simultaneously.
6. While all wheels are being vibrated, both flow control and fail-safe valves are held open.
7. Ensure vehicle moves up and down smoothly without noise and vibration.






Single Wheel Vibration

When either ``11. VIBRATE F/R WHEEL'' through ``14. VIBRATE R/L WHEEL'' shown on CONSULT display is selected, only selected wheel can be vibrated i a pattern similar to all wheels vibration control pattern. Fig. 40.

Fail-Safe Function

1. Check that wheel vibration checks have been completed while observing CONSULT display.






2. Call up ``15. FAIL-SAFE FUNCTION'' mode on CONSULT display.
3. Ensure engine is idling on flat surface and no obstacles interfere with vehicle roll.
4. Release parking brakes to remove friction which may occur while vehicle height changes.
5. Ensure gear selector is set to ``P'' and foot brake is released.

Fig. 41 Fail-Safe Function Control Pattern:

6. Touch START on display. Control pattern shown in Fig. 41 will appear. Each wheel and fail-safe valve is controlled.
7. Flow control valve is held open during fail-safe function checks.
8. Ensure vehicle rolls to right or left and quickly returns to level position after fail-safe valve is closed.
9. After completing fail-safe function checks, touch ``END'' on START display.






VEHICLE HEIGHT ADJUSTMENT
Front wheel height adjustment
^ Set CONSULT to work support mode. Touch 'VEHICLE HEIGHT ADJ." so that "1. FRONT WHL HEIGHT ADJ." appears on CONSULT display.
Make sure engine is idling, selector lever is set to "P", parking brake is "OFF", foot brake is "OFF", and vehicle is on a level surface.
^ Touch "START" on CONSULT display and wait until CONSULT is ready for front wheel height adjustment.
^ Set height control switch (located on center console) from "N" (Normal) to "H" (High) and then return to "N".
^ Move vehicle 2 to 3 meters (7 to 10 ft) back and forth so that it settles down.
Make sure engine is idling, selector lever is set to "P",, parking brake is "OFF", and foot brake is "OFF".






^ Measure distance "A" between center of one front wheel and lower end of fender molding. Similarly measure distance for the other front wheel. Determine distance difference between both measured values.
During front height adjustment, front wheels are controlled in response to output sent from vehicle height sensors and rear wheels are held at a neutral pressure of 4,609 kPa (47 kglcm2, 668 psi).

^ Compare measured distances "A" with specifications indicated below. If either distance is outside specifications, loosen bolts on affected vehicle height sensor, and rotate height sensor to adjust vehicle height.

Specifications:

Distance "A" 375 - 395 mm (14.76-15.55 in)
Distance difference between left and right front wheels 10 mm (0.39 in) or less
^ Turning left vehicle height sensor counterclockwise (when viewed from front side) by 1 graduation (5°) increases vehicle height 14 mm (0.55 in); Turning right vehicle height sensor 1 graduation clockwise increases vehicle height 14 mm (0.55 in.






^ After height adjustment, tighten height sensor bolts to specified torque 5 to 7 N.m (0.5 to 0.7 kg-m, 3.6 to 5.1 ft-lb)].






Rear wheel height adjustment
^ Touch 'NEXT" so that "2. REAR WHL HEIGHT ADJ." appears on CONSULT display.
Make sure engine is idling, selector lever Is set "P", parking brake is "OFF", foot brake is "OFF" and wheel is on a flat surface.
^ Touch "START" on CONSULT display and wait until CONSULT is ready for rear wheel height adjustment.






^ Measure distance B" between center of one rear wheel and lower end of fender molding. Similarly measure distance for the other rear wheel. Determine difference between both measured values.
Make sure front wheels are held at a neutral pressure of 4,609 kPa (47 kglcm2, 668 psi) during rear vehicle height adjustment. Rear wheels are controlled in response to output value of vehicle height sensors.

^ Compare measured distance "B" with specifications indicated below. If either distance is outside specifications, loosen stopper nut on vehicle height sensor connecting rod and change rod length to adjust vehicle height.

Specifications:
Distance "B" 351 - 371 mm (13.82-14.61 in)
Difference In distance "B" between left and rear wheels 10 mm (0.39 in) or less.






^ Measure distance ~ between stopper nuts seating surfaces.
^ Turning connecting rod adjuster one complete rotation (1 pitch = 1.6 mm) causes vehicle height to increase by 7.5 mm (0.295 in).
^ After adjusting connecting rod length, tighten stopper nut to specified torque [3 to 4 N.m (0.3 to 0.4 kg-m, 2.2 to 2.9 ft-lb)].
^ Touch "END" on CONSULT display and stop engine.