Infiniti FX35, FX50 (S51). Manual — part 1163
AIR MIX DOOR CONTROL SYSTEM
HAC-49
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
When ignition switch is ON, unified meter and A/C amp. continuously
and automatically controls temperatures regardless of air conditioner
operational condition. When setting a target temperature with tem-
perature control dial, unified meter and A/C amp. corrects the set
temperature and decides a target air mix door opening angle. Unified
meter and A/C amp. controls air mix door according to the target air
mix door opening angle and current air mix door opening angle for
keeping an optimum air mix door opening angle. When a tempera-
ture is set at 18.0
°
C (60
°
F), air mix door is fixed at full cold, and
when a temperature is set at 32.0
°
C (90
°
F), it is set at full hot.
Potentio Temperature Control (PTC)
The PTC (1) is built into the preset switch. It can be set at an interval
of 0.5
°
C (1.0
°
F) in the 18.0
°
C (60
°
F) to 32.0
°
C (90
°
F) temperature
range by turning temperature control dial. The set temperature is dis-
played.
RJIA1782E
JSIIA0020GB
HAC-50
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
INTAKE DOOR CONTROL SYSTEM
INTAKE DOOR CONTROL SYSTEM
WITHOUT ACCS
WITHOUT ACCS : System Diagram
INFOID:0000000005246235
WITHOUT ACCS : System Description
INFOID:0000000005246236
The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle tem-
perature, intake temperature, amount of sunload and ON/OFF operation of the compressor.
SYSTEM OPERATION
The intake door control judges intake door position based on the ambient temperature, the intake air tempera-
ture and the in-vehicle temperature. When shifting mode position D/F, when the DEF or OFF switches are
pressed, or when A/C switch is OFF, the unified meter and A/C amp. sets the intake door at the FRE position.
Door Motor Circuit
Intake Door Control Specification
JSIIA0777GB
JSIIA0880GB
INTAKE DOOR CONTROL SYSTEM
HAC-51
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
• Intake door position is basically fixed at FRE when FRE indicator
of intake switch is ON or DEF switch is ON.
• Intake door position is basically fixed at REC when REC indicator
of intake switch is ON.
• Intake door automatic control selects FRE, 20 - 80%FRE, or REC
depending on a target air mix door opening angle, based on in-
vehicle temperature, ambient temperature, and sunload.
WITH ACCS
WITH ACCS : System Diagram
INFOID:0000000005246237
WITH ACCS : System Description
INFOID:0000000005246238
The intake doors are automatically controlled by the ambient atmospheric CO and NO
2,
temperature setting,
ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and ON/OFF operation
of the compressor.
SYSTEM OPERATION
The intake door control judges intake door position based on the ambient atmospheric CO and NO
2,
ambient
temperature, the intake air temperature and the in-vehicle temperature. When DEF or OFF switches are
pressed, the unified meter and A/C amp. sets the intake door at the FRE position.
RJIA4067E
JSIIA1161GB
HAC-52
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
INTAKE DOOR CONTROL SYSTEM
Door Motor Circuit
Intake Door Control Specification
• Intake door position is basically fixed at FRE when REC indicator
of intake switch is OFF or DEF switch is ON.
• Intake door position is basically fixed at REC when REC indicator
of intake switch is ON.
• Intake door automatic control selects FRE, 20 - 80%FRE, or REC
depending on a target air mix door opening angle, based on in-
vehicle temperature, ambient temperature, and sunload.
Auto Intake Control System
In addition to the regular automatic control, intake door condition is
controlled by gas sensor output signal when auto intake mode is
selected. This system automatically controls the inlet to prevent a
smell of exhaust gas from getting into vehicle by receiving signals
from the gas sensor that detects ambient atmospheric CO and NO
2.
JSIIA0880GB
RJIA4067E
ZJIA1166E
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