Toyota Sequoia (2005). Manual — part 227
F19466
Compressor Motor
Exhaust Solenoid
Valve
Dryer
Compressor Portion
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
DI–703
897
4.
CONSTRUCTION AND OPERATION OF MAIN COMPONENTS
Compressor Assy
The compressor and motor are used to make the compressed air necessary for raising the vehicle
height.
The exhaust solenoid valve is provided on the compressor assy. The exhaust solenoid valve dis-
charges compressed air from the pneumatic cylinders to the atmosphere in order to lower the vehicle.
The dryer is used to eliminate the moisture in the compressed air made by the compressor and motor.
To protect the battery, this compressor assy operates only when the engine is running.
Specification
Motor
Type
DC
Motor
Rated Voltage
12 V
Exhaust Solenoid Valve
Rated Voltage
12 V
Exhaust Solenoid Valve
Operating Voltage Range
10 to 15 V
Exhaust Solenoid Valve
Resistance
10 to 14
Ω
F19467
Height Control Cleaner
Exhaust Chamber
OUT
IN
F19468
Compressed Air
DI–704
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
898
Height Control Cleaner
The height control cleaner consists of a filter to remove dust and debris, and an expansion chamber
to reduce the intake sound. In consideration of dusty areas, this cleaner draws air from the inside of
the vehicle cabin.
This cleaner cannot be disassembled; therefore, it is not possible to replace only the filter element.
Height Control Cylinder Assy (Pneumatic Cylinder)
The pneumatic cylinder consists of a signal type air chamber with a large compressed air capacity in order
to realize excellent riding comfort.
F19469
Gate Solenoid Valve
Leveling Solenoid Valve
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
DI–705
899
Height Control Valve
The height control valve consists of a leveling solenoid valve, and gate solenoid valve.
Specification
Leveling Solenoid Valve
Rated Voltage
12 V
Leveling Solenoid Valve
Operating Voltage Range
10 to 15 V
Leveling Solenoid Valve
Resistance
10 to 14
Ω
Gate Solenoid Valve
Rated Voltage
12 V
Gate Solenoid Valve
Operating Voltage Range
10 to 15 V
Gate Solenoid Valve
Resistance
17.5 to 21.5
Ω
F19470
Low
High
Link
Arm
DI–706
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
900
Height Control Sensor
The height control sensor detects the vehicle height. One sensor is located in the center of the rear
frame, which is connected to the center of the rear axle via a link, in order to detect the vehicle height.
The sensor has an arm that moves along with the change in vehicle height, and the resultant change
in voltage enables the suspension control ECU to detect the vehicle height.
A semiconductor type sensor has been adopted to make it compact and heat–resistant.
HINT:
Refer to the following factors when adjusting the link of the height control sensor:
The vehicle height changes approximately 4 mm (0.16 in.) with each turn of the link.
The vehicle height changes approximately 2 mm (0.08 in.) by moving the link installation position by
1 mm (0.04 in.).
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