Nissan Teana J32. Manual - part 665

MODE DOOR CONTROL SYSTEM

HAC-29

< FUNCTION DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

JPIIA0767GB

HAC-30

< FUNCTION DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

AIR MIX DOOR CONTROL SYSTEM

AIR MIX DOOR CONTROL SYSTEM

System Diagram

INFOID:0000000003846311

System Description

INFOID:0000000003846312

The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, 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, the mode door and the intake door opening angle data to the air mix

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

• The air mix door motors, the mode door motor and the 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.

• Next, HOT/COLD, DEF/VENT, OPEN/SHUT or FRE/REC operation is selected. The newly selected data is

returned to the A/C auto amp.

Door Motor Circuit

Air Mix Door Control Specification

JPIIA0498GB

JSIIA1133GB

AIR MIX DOOR CONTROL SYSTEM

HAC-31

< FUNCTION DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

When ignition switch is ON, the A/C auto amp. continuously and
automatically controls temperatures regardless of air conditioner
operational condition. When setting a target temperature with the
temperature control switch, the A/C auto amp. corrects the set tem-
perature and decides a target air mix door opening angle. The A/C
auto amp. controls air mix door according to the target air mix door
opening angle and current air mix door opening angle, keeping an
optimum air mix door opening angle. When the temperature is set at
18

°

C (60

°

F), air mix door is set on full cold, and when the tempera-

ture is set at 32

°

C (90

°

F), it is set to full hot.

JPIIA0633GB

HAC-32

< FUNCTION DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

INTAKE DOOR CONTROL SYSTEM

INTAKE DOOR CONTROL SYSTEM

System Diagram

INFOID:0000000003846313

System Description

INFOID:0000000003846314

The intake door is 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 the DEF or OFF switches are pressed, the A/C auto amp. sets the
intake door to the FRE position.

Door Motor Circuit

Intake Door Control Specification

JPIIA0887GB

JSIIA1133GB