Full-Fledged Active Control Suspension
- A hydro-pneumatic active-control suspension without coil springs has been introduced: a first for a mass-produced car.
- This system reduces posture changes, such as car body vibration and roll, caused by driving conditions and uneven road surfaces. The system also provides a high degree of handling, stability, and comfort.
Source: Toyota press release
Independent suspension on all four wheels
Oil ('special' Toyota fluid) with Nitrogen
Once the oil pressure is released the floating piston rises to the top of the bottom accumulator. It is now ready for recharging. The fronts have to be recharged to 1750 kpa (254 psi) and the rears to 1500 kpa (218 psi) - common pressures for a car. Source: http://planetsoarer.com/nitrogen/nitrogen.htm
However: the gas pressure will increase considerably when the suspension strut is compressed. Thus, any refill valve being added will need to be rated for pressures well above these.
Taplin recommends using less pressure (220 and 180) to keep the piston centred and more suitable for (bad) Australian roads.
The UZZ32 suspension offers two height settings , Normal and High.
Other uses for test mode
The suspension test mode can be used as a quick way to raise the vehicle and provide access for eg, oil change, ATF fluid change
Re-gas the accumulators
http://planetsoarer.com/nitrogen/nitrogen.htm http://activesuspensionsystems.com/lelx470susy.html http://www.soarerworld.com/forum/showthread.php?7206-Re-gassing-the-legs-on-a-UZZ32&highlight=Uzz32 http://www.planetsoarer.com/UZZ32/uzz32struts.htm
Suspension Pump rebuild
New valves in existing fill ports
M5x0.8 screw. Allen key head. Re-gas with needle.
Possible suppliers include (?):
- http://www.bmsc.com.au/forums/rallying-technical/17490-diy-bilstein-shock-rebuilding.html (SOS a Suspension)
New valves (larger) in new location
New valves AND internal seals
Suppliers include Peter Taplin
shock absorber handbook