This is information about AHC & AVS on LC200:
2008 Toyota Land Cruiser V8 - Top Speed
It says:
Advanced control technologies
On the new Land Cruiser V8 there are further world-beating, advanced technologies to give the driver complete control under the harshest driving conditions, and also enhance occupant comfort and safety. These include the world’s first Crawl Control system and the world’s first 4-wheel Active Height Control and Adaptive Variable Suspension (4W AHC &AVS).
And:
4W AHC & AVS
The suspension of all four wheels on Land Cruiser V8 is linked for the first time through the new fully adjustable suspension system, 4-wheel Active Height Control and Adaptive Variable Suspension (4W AHC & AVS). Spring rate control is also featured, making this the most sophisticated suspension system available in an SUV and another world first for the Land Cruiser V8.
This new suspension control system, standard on the luxury grade depending on local market, not only allows Land Cruiser V8 to achieve optimum off-road performance but also provides exceptional on-road refinement, comfort, pitch and body roll control. The new spring rate control function operates on the front suspension and is operated by onesingle control valve that influences the suspension characteristics when turning or braking. This means that the front suspension can be stiffened to reduce roll or pitch angle during high-speed manoeuvres, but softened during normal driving to ensure maximum ride comfort.
To achieve a superior performance both on- and off-road, a new mechanical system that functions as a link between the four wheels has been adopted. On-road, the balanced pressure across all four wheels ensures stability and comfort. Off-road, the movement of wheels out of phase with each other allows the hydraulic pressure to vary and releases individual wheels for easier stroking through excellent wheel articulation. This increases the ability of the Land Cruiser to soak up the bumps and offers greater ground contact, meaning rough off-road performance is enhanced.
In addition, the vehicle’s Active Height Control (AHC) functions have been enhanced to extend the range of height adjustment and shorten the time it takes to lower the vehicle. The front of the Land Cruiser V8 now has 110 mm of height adjustment while the rear can travel through 100 mm. Normal to low mode take about two seconds. The Land Cruiser is automatically raised
when L4 gear mode is selected, and further raised by 20 mm when the 4W AHC & AVS system recognises that the vehicle is stuck. It automatically lowers the vehicle when driving at high speeds to improve stability.
The Adaptive Variable Suspension (AVS) sub system gives greater ride comfort on-road and new control parameters have also been adopted to allow greater ground-covering performance over rough roads.
Not sure if it is just an optional package for different market.
