Nissan GT-R. Manual - part 162

HAC-10

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

Ambient sensor

—

A/C auto amp.

—

Blower motor

—

Magnet clutch

—

ECV

—

Intake door motor

—

Intake sensor

—

In-vehicle sensor

—

Mode door motor

—

Preset switch

The preset switch integrated with the controller for A/C operation 
and AV switch is installed to the center of the instrument panel. 
The operation and the display data of the preset switch are com-
municated with the A/C auto amp. through AV control unit via 
CAN communication.

Refrigerant pressure sensor

—

Sunload sensor

—

Component

Reference

MODE DOOR CONTROL SYSTEM

HAC-11

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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MODE DOOR CONTROL SYSTEM

System Diagram

INFOID:0000000009163973

System Description

INFOID:0000000009163974

The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload. 

SYSTEM OPERATION

• The A/C auto amp. receives data from each of the sensors. 
• The A/C auto amp. sends air mix door, mode door and intake door opening angle data to the air mix door

motor LCUs, mode door motor LCU and intake door motor LCU.

• The air mix door motors, mode door motor and intake door motor read their respective signals according to

the address signal. Opening angle indication signals received from the A/C auto amp. and each of the motor
position sensors are compared by the LCUs in each door motor with the existing decision and opening
angles.

• Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data are

returned to the A/C auto amp.

Door Motor Circuit

MODE DOOR CONTROL SPECIFICATION

JSIIA1543GB

JSIIA1133GB

HAC-12

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

MODE DOOR CONTROL SYSTEM

• The air outlet can be selected manually by pressing the MODE

switch or the DEF switch of preset switch. The air outlet can be
fixed. 

• The automatic control by A/C auto amp. is available by pressing

the AUTO switch. 

• Select the mode door position (VENT, B/L, FOOT, D/F) according

to the air flow temperature calculated by the A/C auto amp. based
on the target air mix door position and sunload amount at the air
outlet automatic control. 

JSIIA1334GB

AIR MIX DOOR CONTROL SYSTEM

HAC-13

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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AIR MIX DOOR CONTROL SYSTEM

System Diagram

INFOID:0000000009163975

System Description

INFOID:0000000009163976

The air mix door is automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload.

SYSTEM OPERATION

• The A/C auto amp. receives data from each of the sensors.
• The A/C auto amp. sends air mix doors, mode door and intake door opening angle data to the air mix door

motor LCUs, mode door motor LCU and intake door motor LCU.

• The air mix door motors, mode door motor and intake door motor read their respective signals according to

the address signal. Opening angle indication signals received from the A/C auto amp. and each of the motor
position sensors are compared by the LCUs in each door motor with the existing decision and opening
angles.

• Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data are

returned to the A/C auto amp.

Door Motor Circuit

AIR MIX DOOR CONTROL SPECIFICATION

JSIIA1545GB

JSIIA1133GB