Subaru XT 1988 Service Manual page 765

4-1
SUSPENSION
Vehicle height sensor
Vehicle height sensor consists of reed switch and magnet. The
reed switch is fixed on a body side part of air suspension
ASSY and magnet is fixed on a wheel side part of it. Height
signal is generated according to the relation between the
positions of reed switch and magnet.
~Magnet
Reed switch
Vehicle height sensor
Fig. 8
Solenoid valve (control valve)
This valve is operated according to a signal from control unit
when air is charged or discharged for air suspension.
Fig. 10
Solenoid valve
-----
Bracket
L4-121
The shape of bracket differs according to the installing
position.
Drier
Drier dries air which flows through the drier to air tank or
each air spring with silica gel in order to prevent freeze of
water in air pipe. Silica gel is refreshed by dry air when
discharging.
A residual pressure valve is provided so that the diaphragm can
always be held in the expanded state, hence a residual pressure
of 98 kPa (1 kg/cm
2
,
14 psi) remains in the air chamber even
Control unit
after air discharge operation is completed.
The control unit receives signals from the veh icle height
sensors and others, and controls the solenoid valve of each air
Silica gel
suspension as well as the compressor. The microcomputer
adopted in this control unit permits each wheel to be con-
trolled independently so as to obtain the optimum perform-
ance according to the loaded condition of the vehicle.
Compressor
Fig. 11
Air tank
Air tank
or each air
spring
L4-122
Pressure switch and solenoid valve for air charge are incorpo-
L4-851
rated in air tank. The air tank is filled with compressed air of
L
F - ; g . - . - 9 - - - - - - - - - - - - - - - - - - - - - - - - - '
755 to 941 kPa (7.7 to 9.6 kg/cm2, 109 to 137 psi).
8