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.).