Infiniti QX56 (Z62). Manual - part 1103

DESCRIPTION

SCS-49

< SYSTEM DESCRIPTION >

[AIR LEVELIZER CONTROL SYSTEM]

C

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SCS

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SYSTEM DESCRIPTION

DESCRIPTION

Description

INFOID:0000000006256039

• Corrects sinkage of vehicle rear that occurs in laden or towing conditions.
• Maintains vehicle height at a constant level and improves riding comfort by charging or discharging air in air

chamber of rear shock absorber, according to signal from vehicle height sensor installed to rear suspension.

SCS-50

< SYSTEM DESCRIPTION >

[AIR LEVELIZER CONTROL SYSTEM]

COMPONENT PARTS

COMPONENT PARTS

Component Parts Location

INFOID:0000000006256040

Component Description

INFOID:0000000006256041

1.

Combination meter
Refer to 

MWI-6, "METER SYSTEM 

: Component Parts Location"

.

2.

CK SUSP indicator lamp

3.

Air levelizer control module

4.

Air compressor relay

5.

Air chamber

6.

Air compressor

7.

Vehicle height sensor

A.

Inside of  luggage side finisher low-
er (LH)

B.

Engine room (RH)

C.

Rear shock absorber

D.

Vehicle rear (LH)

JSEIA0223GB

Component parts

Reference

Air levelizer control module

SCS-51, "Air Levelizer Control Module"

Vehicle height sensor

SCS-51, "Vehicle Height Sensor"

Air compressor

SCS-51, "Air Compressor"

Exhaust solenoid

COMPONENT PARTS

SCS-51

< SYSTEM DESCRIPTION >

[AIR LEVELIZER CONTROL SYSTEM]

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Air Levelizer Control Module

INFOID:0000000006256042

• Operates ON/OFF of air compressor (exhaust solenoid), according to signal from vehicle height sensor.
• Transmits CK SUSP indicator lamp signal to the combination meter via CAN communication, when setting of

standard vehicle height is incomplete.

• If malfunction is detected, the system enters fail-safe mode. Refer to 

SCS-59, "Fail-safe"

.

Vehicle Height Sensor

INFOID:0000000006256043

Measures vehicle height of vehicle rear and transmits this information to air levelizer control module according
to electric signal.

Air Compressor

INFOID:0000000006256044

Operates according to signal from air levelizer control module via air compressor relay, and charges air in air
chamber of rear shock absorber.

EXHAUST SOLENOID

Operates according to signal from air levelizer control module, and discharges air in air chamber of rear shock
absorber.

Air Compressor Relay

INFOID:0000000006256045

Turns ON according to signal from air levelizer control module, and operates air compressor.

CK SUSP Indicator Lamp

INFOID:0000000006256046

• Turns ON for 2 seconds when ignition switch is turned ON, for the purpose of bulb check.
• Turns ON when setting of standard vehicle height is incomplete.
NOTE:
Does not turn ON when the system is malfunctioning.

Air compressor relay

SCS-51, "Air Compressor Relay"

CK SUSP indicator lamp

SCS-51, "CK SUSP Indicator Lamp"

Component parts

Reference

SCS-52

< SYSTEM DESCRIPTION >

[AIR LEVELIZER CONTROL SYSTEM]

STRUCTURE AND OPERATION

STRUCTURE AND OPERATION

Rear Shock Absorber

INFOID:0000000006256047

• Discharges air in air chamber (2) from air valve (1) when vehicle height of vehicle rear is higher than stan-

dard vehicle height, has shock absorber stroke in compressed direction, lowers vehicle height, and returns it
to standard vehicle height.

• Also charges air in air chamber from air valve when height of vehicle rear is lower than standard vehicle

height, has shock absorber stroke in extending direction, raises vehicle height, and returns it to standard
vehicle height.

• Charged air, because of rubber (3) that is hard and located on side surface, does not expand in lateral direc-

tion, but expands in vertical direction, and enables shock absorber to extend or retract.

Without Hydraulic Body-Motion Control System

With Hydraulic Body-Motion Control System

JSEIA0217ZZ

1.

Air valve

2.

Air chamber

3.

Rubber

A.

Stroke

:

Vehicle upper

JSEIA0218ZZ

1.

Air valve

2.

Air chamber

3.

Rubber

A.

Stroke

:

Vehicle upper