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Infiniti QX56 (Z62). Manual - part 780

COMPONENT PARTS

HAC-11

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : Component Parts Location

INFOID:0000000006275852

ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : Component Description

INFOID:0000000006275853

Preset switch

Exhaust gas / outside odor detecting
sensor

AV control unit
Refer to

AV-9, "Component Parts Lo-

cation"

Front display

Ionizer

Intake door motor

A/C auto amp.

Left side of heater & cooling unit as-
sembly

Back side of blower unit assembly

Cluster lid C is removed

JMIIA0814ZZ

Component

Description

Blower unit

Intake door motor

The LCU (Local Control Unit) is installed to intake door motor so as to per-
form the multiplex communication control (LIN).
Refer to

HAC-18, "FRONT AUTOMATIC AIR CONDITIONING SYSTEM :

Door Control"

AV control unit

AV control unit transmits A/C switch operation signal to A/C auto amp. via
CAN communication line.

A/C auto amp.

A/C auto amp. controls ACCS (advanced climate control system) by input-
ting and calculating signals from each sensor and each switch. A/C auto
amp. has self-diagnosis function. Diagnosis of ACCS (advanced climate
control system) can be performed quickly.

Exhaust gas / outside odor detecting sensor

Exhaust gas / outside odor detecting sensor measures unpleasant odor out-
side of passenger room. In addition to previous exhaust gas detection func-
tion, unpleasant odor in ambient atmosphere is measured.

HAC-12

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

COMPONENT PARTS

Aspirator

INFOID:0000000006275856

The aspirator generates the vacuum by the air blown from the heater
& cooling unit and draws the air of the passenger room to the front
in-vehicle sensor area via the aspirator duct.

Front Blower Motor

INFOID:0000000006275857

The front blower motor utilizes a brush-less motor with a rotating
magnet. Quietness is improved comparing to a conventional motor
(brush motor) that rotates coil while brush functions as contact
points.

Front display

Front display indicates operation status of ACCS (advanced climate control
system).

Heater & cooling unit as-
sembly

Ionizer

Ionizer generates an approximately equal proportional amount of positive
and negative ions in the air.

Preset switch

Preset switch is integrated with front A/C control and AV operation switch.
Front A/C control operation signal is transmitted from preset switch to AV
control unit via communication line.

Component

Description

RJIA1804E

RJIA2467J

ZHA152H

COMPONENT PARTS

HAC-13

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

Rear Blower Motor

INFOID:0000000006275858

The rear blower motor utilizes a brush-less motor with a rotating
magnet. Quietness is improved comparing to a conventional motor
(brush motor) that rotates coil while brush functions as contact
points.

Refrigerant Pressure Sensor

INFOID:0000000006275859

Description

Refrigerant pressure sensor is installed to upper portion of liquid tank. The refrigerant pressure sensor con-
verts high-pressure side refrigerant pressure into voltage and outputs it to ECM. ECM operates cooling system
protection and idle speed control according to voltage value that is input.

Structure and operation

The refrigerant pressure sensor is a capacitance type sensor. It consists of a pressure detection area and a
signal processing area. The pressure detection area, which is a variable capacity condenser, changes internal
static capacitance according to pressure force. The signal processing area detects the static capacitance of
the pressure detection area, converts the static capacitance into a voltage value, and transmits the voltage
value to ECM.

RJIA2467J

ZHA152H

PBIB2657E