Nissan Sentra. Instruction — part 542
HAC-16
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
SYSTEM
• Rotation of motor is transmitted to air mix door (driver side) [upper air mix door (driver side) and lower air mix
door (driver side)] by link, rod and lever, then air flow temperature (driver side) is switched.
DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
AIR MIX DOOR MOTOR (PASSENGER SIDE)
DESCRIPTION
• The step motor system is adopted for air mix door motor (passenger side).
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
• Rotation of motor is transmitted to air mix door (passenger side) [upper air mix door (passenger side) and
lower air mix door (passenger side)] by link, rod and lever, then air flow temperature (passenger side) is
switched.
DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
MODE DOOR MOTOR
DESCRIPTION
• The step motor system is adopted for mode door motor.
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
• Rotation of motor is transmitted to mode door (center ventilator and defroster door, sub defroster door, side
ventilator door, and foot door) by link, rod, and lever, then air outlet is switched.
DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
JMIIA1954GB
JMIIA1955GB
SYSTEM
HAC-17
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
• Direction of rotation is changeable by recomposing pattern of excitation.
INTAKE DOOR MOTOR
• Intake door motor consists of motor that drives door and PBR (Potentio Balance Register) that detects door
position.
• Motor operates intake door according to control signal from A/C auto amp.
• Rotation of motor is transmitted to intake door by lever, then air inlet is switched.
• PBR (Potentio Balance Register) transmits PBR feedback signal to A/C auto amp. according to motor posi-
tion.
• According to PBR feedback signal, A/C auto amp. monitors that motor is in an appropriate door position.
SWITCHES AND THEIR CONTROL FUNCTION
JZIIA0033GB
JSIIA1633GB
HAC-18
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
SYSTEM
Intake door
Blower motor
Air conditioner filter
Evaporator
Upper air mix door (driver side/pas-
senger side)
Lower air mix door (driver side/pas-
senger side)
Heater core
Foot door
Side ventilator door
Sub defroster door
Center ventilator and defroster door
Fresh air intake
Recirculation air
Discharge air
Defroster
Center ventilator
Side ventilator
Rear ventilator
Front foot
Rear foot
JMIIA1958ZZ
SYSTEM
HAC-19
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*: Inlet status is displayed by indicator during activating automatic control
AIR DISTRIBUTION
Switch position
Door position
Mode door
In
take
do
or
Air mix door
(Driver side)
(Passenger
side)
Ce
nte
r v
en
tila
to
r an
d
de
fros
te
r do
or
Su
b de
fr
os
te
r do
or
Si
de
ve
nt
ila
to
r do
or
Fo
ot
do
or
Up
pe
r ai
r mi
x do
or
Lo
we
r ai
r mi
x do
or
Up
pe
r ai
r mi
x do
or
Lo
we
r ai
r mi
x do
or
AUTO switch
AUTO
—
—
—
—
—
MODE switch
DEF switch
REC switch
*
—
—
—
—
FRE switch
*
Temperature control
switch (Driver side)
DUAL
switch:
OFF
Full cold
18
°C
—
18.5
°C – 31.5°C
AUTO
Full hot
32
°C
Temperature control
switch (Driver side)
DUAL
switch:
ON
Full cold
18
°C
—
—
18.5
°C – 31.5°C
AUTO
Full hot
32
°C
Temperature control
switch (Passenger
side)
Full cold
18
°C
—
—
18.5
°C – 31.5°C
AUTO
Full hot
32
°C
ON·OFF switch
OFF
—
—
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