Nissan Qashqai (2007-2010). Manual — part 919

HAC-36

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

MODE DOOR CONTROL SYSTEM

LAN System Circuit

Mode Door Control Specification

Mode position can be selected manually by pressing MODE switch
or DEF switch of the controller. This enables to fix a mode position.
Automatic control by auto amp. Pressing AUTO switch allows auto-
matic control by auto amp. During the automatic control of mode
position, a mode door position (VENT, B/L, FOOT, or D/F) is selected
based on a target air mix door opening angle and sunload depending
on a temperature calculated by auto amp. In addition, D/F is
selected to prevent windshield fogging only when ambient tempera-
ture is extremely low with mode position FOOT.

JPIIA0122GB

JPIIA0124GB

HIGH-LEVEL VENTILATOR DOOR CONTROL SYSTEM

HAC-37

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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HIGH-LEVEL VENTILATOR DOOR CONTROL SYSTEM

Description

INFOID:0000000000955084

SYSTEM DESCRIPTION

Component Parts

Hi-level ventilator door control system components are:

• Auto amp.
• High-level ventilator door motor (LCU)
• A/C LAN system (PBR built-in mode door motor, high-level ventilator door motor, air mix door motor and

intake door motor)

• High-level ventilator switch

System Operation

• The auto amp. sends air mix door, mode door, high-level ventilator door and intake door opening angle data

to the air mix door motor LCUs, mode door motor LCU, high-level ventilator door motor LCU and intake door
motor LCU.

• The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their

respective signals according to the address signal. Opening angle indication signals received from the 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, OPEN/SHUT and FRE/REC operation is selected. The new selec-

tion data are returned to the auto amp.

JPIIA0165GB

HAC-38

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HIGH-LEVEL VENTILATOR DOOR CONTROL SYSTEM

LAN System Circuit

JPIIA0122GB

AIR MIX DOOR CONTROL SYSTEM

HAC-39

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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AIR MIX DOOR CONTROL SYSTEM

Description

INFOID:0000000000954639

SYSTEM DESCRIPTION

Component Parts

Air mix door control system components are:

• Auto amp.
• Air mix door motor (LCU)
• A/C LAN system (PBR built-in mode door motor, high-level ventilator door motor, air mix door motor and

intake door motor)

• In-vehicle sensor
• OAT sensor
• Sunload sensor
• Intake sensor

System Operation

• The auto amp. receives data from each of the sensors.
• The auto amp. sends air mix doors, mode door, high-level ventilator door and intake door opening angle

data to the air mix door motor LCUs, mode door motor LCU, high-level ventilator door motor LCU and intake
door motor LCU.

• The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their

respective signals according to the address signal. Opening angle indication signals received from the 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, OPEN/SHUT and FRE/REC operation is selected. The new selec-

tion data are returned to the auto amp.

JSIIA0310GB