Suspension: Description and Operation

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: SYSTEM DIAGRAM













SYSTEM DESCRIPTION

1. OUTLINE

(a) The air suspension system is adopted as optional equipment.

(b) This system uses pneumatic cylinders instead of the coil springs that are used in conventional suspension. The suspension control ECU analyzes information based on the input signals from the height control switches, height control sensors, and various ECUs, and operates the height control compressor assembly, and height control solenoid valves to control the vehicle height.

(c) Using the 4 height control sensors, the suspension control ECU detects changes in the vehicle height resulting from the number of occupants or the amount of cargo. Then, the suspension control ECU controls the height control valves and the height control compressor assembly in order to automatically adjust the vehicle height to maintain a constant vehicle height. Thus, a high level of ride comfort and handling stability are achieved.

(d) While driving, 3 vehicle height mode settings can be selected by operating the height control switch: HI (high), N (normal), and LO (low) mode:

* The HI (high) mode vehicle height ensures the vehicle's ability to traverse rough roads.

* The N (normal) mode vehicle height helps realize excellent controllability and ride comfort during normal driving.

* The LO (low) mode vehicle height improves aerodynamics and reduces roll angle.

(e) To enhance convenience when loading and unloading with the vehicle stopped, luggage mode is used to lower the vehicle height 30 mm (1.18 in.) compared to the normal vehicle height. In accordance with the adoption of this mode, an additional height control switch is provided in the luggage compartment to supplement the height control switch located at the driver seat. Providing this height control switch in the luggage compartment allows the user to select luggage mode even while the engine switch is off.

Height Control Adjustment Values





(e) *: The adjustment values shown in the table represent deviations from the 180 mm (7.09 in.) ground clearance in N (normal) mode.