Qashqai J11. Heater & Air conditioning Control System — part 2
COMPONENT PARTS
HAC-17
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
A/C UNIT ASSEMBLY : Blower Motor
INFOID:0000000010432160
• Brush motor, that rotates coil while brush functions as contact
points, is adopted for blower motor.
• Rotation speed changes according to voltage from power transis-
tor.
A/C UNIT ASSEMBLY : Power Transistor
INFOID:0000000010432161
• Power transistor, that uses MOS field effect transistor, is adopted
for blower motor speed control.
NOTE:
MOS field effect transistor is a transistor for which the gate portion
is composed of a metal electrode on an oxide layer of semiconduc-
tor. Field effect transistor is controlled by voltage, while ordinary
transistor is controlled by current. Electrode of field effect transistor
is called source, drain, or gate, while electrode of ordinary transis-
tor is called emitter, collector, or base.
• Power transistor continuously controls voltage to blower motor, according to gate voltage from A/C auto
amp.
• This power transistor does not require a HI relay even when the maximum voltage is applied to blower motor
at HI status, because voltage drop is nominal.
A/C UNIT ASSEMBLY : PTC Heater
INFOID:0000000010499375
• PTC heater is installed on passenger lower side of A/C unit assembly.
• Heat element is heated and air flow temperature is increased by
power supply from PTC relay.
JMIIA3336ZZ
JMIIA0793GB
JMIIA3335ZZ
JMIIA2397ZZ
HAC-18
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
COMPRESSOR
COMPRESSOR : Magnet Clutch
INFOID:0000000010432162
DESCRIPTION
Compressor is driven by the magnet clutch which is magnetized by electric power supply.
STRUCTURE AND OPERATION
• Magnet clutch consists of pulley, clutch disc, and field coil.
- Pulley is connected with crankshaft pulley of engine via drive belt
and is always rotated while engine is running.
- Clutch disc is connected with drive shaft of compressor.
- Field coil, which becomes a strong electric magnet when electricity
is supplied, strongly pulls clutch disc and presses it to pulley.
• When A/C relay integrated in IPDM E/R turns ON, electricity is
supplied to field coil, clutch disc is presses to pulley, and engine
rotational movement is transmitted from crankshaft pulley
⇒
drive
belt
⇒
pulley
⇒
clutch disc
⇒
drive shaft. Compressor is operated.
When A/C relay turns OFF, electricity is not supplied to field coil,
and clutch disc is released from pulley. Compressor is not oper-
ated.
COMPRESSOR : ECV (Electrical Control Valve)
INFOID:0000000010432163
• ECV (Electrical Control Valve) is integrated in the compressor.
IPDM E/R receives the ECV control signal from A/C auto amp. via
CAN communication, and ECV is controlled according to the con-
trol signal transmitted from IPDM E/R.
• ECV is controlled according to the control signal transmitted from
IPDM E/R.
The control signal transmitted by IPDM E/R is controlled according
to the ECV control signal transmitted from A/C auto amp. via CAN
communication.
• ECV varies the air pressure balance in the left and right air spaces
that are divided by the swash plate in order to change the angle of
the swash plate inside the compressor.
By changing the swash plate angle, it changes the piston stroke and controls the refrigerant discharge
amount.
A/C Control
INFOID:0000000010432164
A/C control has switches and display that can set and indicate the
operation of automatic air conditioning system. A/C control transmits
setting status to A/C auto amp. via LIN communication line. A/C auto
amp. controls automatic air conditioning system.
JMIIA1767GB
JMIIA3566GB
JMIIA3334ZZ
COMPONENT PARTS
HAC-19
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
A/C Auto Amp.
INFOID:0000000010432165
A/C auto amp. controls automatic air conditioning system by input-
ting and calculating signals from each sensor and each switch. A/C
auto amp. has self-diagnosis function. Diagnosis of automatic air
conditioning system can be performed quickly.
Ambient Sensor
INFOID:0000000010503106
Ambient sensor measures ambient air temperature. The sensor
uses a thermistor which is sensitive to the change in temperature.
The electrical resistance of the thermistor decreases as temperature
increases.
In-vehicle Sensor
INFOID:0000000010432167
In-vehicle sensor measures temperature of intake air that flows
through aspirator to passenger room. The sensor uses a thermistor
which is sensitive to the change in temperature. The electrical resis-
tance of the thermistor decreases as temperature increases.
Sunload Sensor
INFOID:0000000010432168
Sunload sensor measures sunload amount. This sensor converts
sunload amount to voltage signal by photodiode and transmits it to
A/C auto amp.
Refrigerant Pressure Sensor
INFOID:0000000010432169
DESCRIPTION
JMIIA3333ZZ
JMIIA1719GB
JMIIA1720GB
JMIIA1956GB
HAC-20
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
• The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it
to ECM.
• ECM operates cooler cycle protection and cooling fan speed control according to voltage value that is input.
STRUCTURE AND OPERATION
• The refrigerant pressure sensor is a capacitance type sensor. It consists of a pressure detection area and a
signal processing area.
• The pressure detection area, which is a variable capacity condenser, changes internal static capacitance
according to pressure force.
• The signal processing area detects the static capacitance of the pressure detection area, converts the static
capacitance into a voltage value, and transmits the voltage value to ECM.
PBIB2657E
SYSTEM
HAC-21
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYSTEM
AUTOMATIC AIR CONDITIONING SYSTEM
AUTOMATIC AIR CONDITIONING SYSTEM : System Description
INFOID:0000000010432170
SYSTEM DIAGRAM
DESCRIPTION
• Automatic air conditioning system is controlled by each function of A/C auto amp., ECM and IPDM E/R.
• Each operation of air conditioning system can be controlled by A/C control.
CONTROL BY A/C AUTO AMP.
•
HAC-22, "AUTOMATIC AIR CONDITIONING SYSTEM : Temperature Control"
•
HAC-23, "AUTOMATIC AIR CONDITIONING SYSTEM : Air Outlet Control"
•
HAC-23, "AUTOMATIC AIR CONDITIONING SYSTEM : Air Flow Control"
•
HAC-24, "AUTOMATIC AIR CONDITIONING SYSTEM : Air Inlet Control"
•
HAC-24, "AUTOMATIC AIR CONDITIONING SYSTEM : Compressor Control"
•
HAC-25, "AUTOMATIC AIR CONDITIONING SYSTEM : Door Control"
•
HAC-29, "AUTOMATIC AIR CONDITIONING SYSTEM : Cooling Fan Control"
•
HAC-30, "AUTOMATIC AIR CONDITIONING SYSTEM : Door Motor Starting Position Reset Control"
JMIIA3567GB
HAC-22
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
• Correction for input value
Ambient temperature correction
- A/C auto amp. inputs the temperature detected by ambient sensor as the ambient temperature.
- A/C auto amp. performs the correction of the temperature detected by ambient sensor for air conditioning
control.
- A/C auto amp. selects and uses the initial value of ambient temperature data depending on the engine cool-
ant temperature when turning the ignition switch from OFF to ON. The detection temperature of the ambient
sensor is used when engine coolant temperature is low [less than approximately 56
°
C (133
°
F)]. The mem-
ory data (before the ignition switch is OFF) when the engine is warmed up [approximately 56
°
C (133
°
F) or
more].
- The correction of the ambient temperature is not performed when the detection temperature of the ambient
temperature is less than approximately
−
20
°
C (–4
°
F).
In-vehicle temperature correction
- A/C auto amp. inputs the temperature detected by in-vehicle sensor as the in-vehicle temperature.
- A/C auto amp. performs the correction of the temperature detected by in-vehicle sensor for air conditioning
control.
- A/C auto amp. performs the correction so that the recognition passenger room temperature changes
depending on the difference between the detected passenger room temperature and the recognition pas-
senger room temperature. If the difference is large, the changing is early. The changing becomes slow as
the difference becomes small.
Intake temperature correction
- A/C auto amp. inputs the temperature detected by intake sensor as the intake temperature (evaporator tem-
perature).
- A/C auto amp. performs the correction of the temperature detected by intake sensor for air conditioning con-
trol.
- A/C auto amp. performs the correction so that the recognition intake temperature changes depending on the
difference between the detected intake temperature and the recognition intake temperature. If the difference
is large, the changing is early. The changing becomes slow as the difference becomes small.
Sunload amount correction
- A/C auto amp. inputs the sunload amount detected by sunload sensor.
- A/C auto amp. performs the correction of the sunload amount detected by sunload sensor for air condition-
ing control.
- When the sunload amount suddenly changes, for example when entering a tunnel, perform the correction so
that the recognition sunload amount of the A/C auto amp. changes slowly.
Set temperature correction
- A/C auto amp. performs the correction to the target temperature set by the temperature control switch so as
to match the temperature felt by the passengers depending on the ambient temperature detected by ambi-
ent sensor and controls it so that the in-vehicle temperature is always the most suitable.
CONTROL BY ECM
HAC-24, "AUTOMATIC AIR CONDITIONING SYSTEM : Compressor Control"
CONTROL BY IPDM E/R
HAC-24, "AUTOMATIC AIR CONDITIONING SYSTEM : Compressor Control"
AUTOMATIC AIR CONDITIONING SYSTEM : Temperature Control
INFOID:0000000010432171
• When ignition switch is in the ON position, A/C auto amp. always
automatically controls temperature regardless of air conditioner
operational state.
• A/C auto amp. calculates the target air mix door opening angle
depending on set temperature, in-vehicle temperature, ambient
temperature, and sunload.
• Air mix door is controlled depending on the comparison of current
air mix door opening angle and target air mix door opening angle.
• Regardless of in-vehicle temperature, ambient temperature, and
sunload, air mix door is fixed at the fully cold position when set
temperature is 16.0
°
C, and at the fully hot position when set tem-
perature is 30.0
°
C.
JPIIA0633GB
SYSTEM
HAC-23
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
AUTOMATIC AIR CONDITIONING SYSTEM : Air Outlet Control
INFOID:0000000010432172
• While air outlet is in automatic control, A/C auto amp. selects the
mode door position depending on a target air mix door angle and
outlet air temperature calculated from sunload.
• If ambient temperature is excessively low, D/F is selected to pre-
vent windshield fogging when air outlet is set to FOOT.
AUTOMATIC AIR CONDITIONING SYSTEM : Air Flow Control
INFOID:0000000010432173
DESCRIPTION
• A/C auto amp. changes gate voltage of power transistor and controls air flow continuously. When air flow is
increased, voltage of blower motor gradually increases to prevent a sudden increase in air flow.
• In addition to manual control and automatic control, air flow control is compose of starting fan speed control,
low coolant temperature starting control, high in-vehicle temperature starting control, and blower speed con-
trol at door motor operation.
AUTOMATIC AIR FLOW CONTROL
• A/C auto amp. decides target air flow depending on target air mix door opening angle.
• A/C auto amp. changes voltage of blower motor and controls air flow continuously so that air flow matches to
target air flow.
• When air outlet is VENT or B/L, the minimum air flow is changed
depending on sunload.
STARTING FAN SPEED CONTROL
When blower motor is activated, A/C auto amp. gradually increases voltage of blower motor to prevent a sud-
den increase in discharge air flow. [T
1 –
T
2
= approximately 5 seconds (for Europe and Russia), approximately
7 seconds (except for Europe and Russia)]
NOTE:
Do not perform the starting air flow control when the discharge outlet
is set to DEF.
LOW COOLANT TEMPERATURE STARTING CONTROL
JMIIA0710GB
JMIIA1129GB
JMIIA1130GB
HAC-24
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
If the engine coolant temperature is 56
°
C (133
°
F) or less, to prevent
a cold discharged air flow, A/C auto amp. suspends blower motor
activation for the maximum 150 seconds depending on target air mix
door opening angle. After this, voltage of blower motor is increased
gradually, and blower motor is activated.
HIGH IN-VEHICLE TEMPERATURE STARTING CONTROL
When evaporator temperature is high [intake sensor value is 35
°
C (95
°
F) or more], to prevent a hot dis-
charged air flow, A/C auto amp. suspends blower motor activation for approximately 3 seconds so that evapo-
rator is cooled by refrigerant.
FAN SPEED CONTROL AT DOOR MOTOR OPERATION
When mode door motor is activated while air flow is more than the specified value, A/C auto amp. reduces
temporarily fan speed so that mode door moves smoothly.
AUTOMATIC AIR CONDITIONING SYSTEM : Air Inlet Control
INFOID:0000000010432174
• A/C auto amp. controls intake door motor, and change air inlet.
• While air inlet is in automatic control, A/C auto amp. selects air
inlet (fresh air intake, 20% fresh air intake, or recirculation)
depending on set temperature, in-vehicle temperature, and ambi-
ent temperature.
AUTOMATIC AIR CONDITIONING SYSTEM : Compressor Control
INFOID:0000000010432175
DESCRIPTION
• When the compressor activation condition is satisfied while blower motor is activated, A/C auto amp. trans-
mits A/C ON signal and blower fan ON signal to ECM.
• ECM judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal,
etc.), and transmits the A/C compressor request signal to IPDM E/R via CAN communication line.
• By receiving the A/C compressor request signal from ECM, IPDM E/R turns the A/C relay to ON, and acti-
vates the compressor. Refer to
PCS-7, "RELAY CONTROL SYSTEM : System Description"
CONTROL BY A/C AUTO AMP.
Low Temperature Protection Control
When intake sensor detects that evaporator fin temperature is
[
−
5.0
°
C (23.0
°
F)] or less, A/C auto amp. requests ECM to turn the
compressor OFF, and stops the compressor.
When the air temperature returns to
[1.0
°
C (33.8
°
F)] or more, the
compressor is activated.
Refrigerant Discharge Amount Control
JMIIA1227GB
JMIIA0711GB
JMIIA2550GB
SYSTEM
HAC-25
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
• A/C auto amp. transmits the ECV control signal via CAN communication. IPDM E/R transmits the control sig-
nal to ECV according to the received ECV control signal.
• ECV is controlled according to change in the duty ratio of the transmitted control signal.
• Except when temperature setting is full cold or outlet is DEF, A/C auto amp. controls the refrigerant dis-
charge amount according to the required cooling capacity.
• A/C auto amp. increases the refrigerant discharge amount when evaporator temperature is higher than the
target temperature upper limit, and reduces the refrigerant discharge amount when evaporator temperature
is at or below the target temperature upper limit.
NOTE:
Target temperature upper limit value of evaporator can be changed using “TARGET EVAPORATOR TEMP
UPPER LIMIT SETTING” in “WORK SUPPORT” mode of CONSULT. Refer to
Evaporator Temperature Upper Limit Value"
.
Compressor Oil Circulation Control
When the engine starts, A/C auto amp. activates the compressor for a few seconds and circulates the com-
pressor oil once.
CONTROL BY ECM
Compressor Protection Control at Pressure Malfunction
When the high-pressure side value that is detected by refrigerant pressure sensor is as per the following state,
ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.
• 3.12 MPa (31.82 kg/cm
2
, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)
• 2.74 MPa (27.95 kg/cm
2
, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.43 kg/cm
2
, 20.3 psi) or less
Air Conditioning Cut Control
When the engine condition is high load, ECM transmit A/C relay OFF request to IPDM E/R, and stops the
compressor.
AUTOMATIC AIR CONDITIONING SYSTEM : Door Control
INFOID:0000000010432176
SWITCH AND THEIR CONTROL FUNCTION
HAC-26
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
*1: With rear ventilator
*2: With rear foot duct
NOTE:
The sub-defroster and side ventilator door include a permanent opening and does not fully close.
Intake door
Blower motor
Air conditioner filter
Evaporator
Heater core
PTC heater
Air mix door (driver side/passenger
side)
Foot door
Side ventilator door
Sub defroster door
Center ventilator and defroster door
Fresh air
Recirculation air
Discharge air
Defroster
Center ventilator
Side ventilator
Rear ventilator
*1
Front foot
Rear foot
*2
JMIIA3570ZZ
SYSTEM
HAC-27
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
For Europe and Russia
*: Air inlet status is displayed by indicator during activating automatic control
Switch/dial position
Door position
Mode door
In
ta
k
e
do
or
Air mix door
Ce
nt
e
r v
e
n
til
at
o
r a
n
d
de
fr
ost
e
r
do
or
S
u
b
de
fros
te
r do
or
Si
de
v
e
n
til
at
o
r
do
or
Fo
ot doo
r
Driver side
Pa
ss
en
ge
r si
de
AUTO switch
AUTO
—
—
—
• MODE VENT switch
• MODE FOOT switch
• MODE DEF switch
• MAX DEF switch
MODE
position
VENT/DEF (V/D)
VENT
Bi-level (B/L)
ALL
FOOT
DEF/FOOT (D/F)
DEF
INTAKE switch*
REC
—
—
—
—
FRE
Temperature control
dial (Driver side)
DUAL
switch:
OFF
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
Temperature control
dial (Driver side)
DUAL
switch:
ON
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
Temperature control
dial (Passenger side)
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
ON·OFF switch
OFF
—
HAC-28
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
Except for Europe and Russia
*: Air inlet status is displayed by indicator during activating automatic control
AIR DISTRIBUTION
Without rear ventilator, without rear foot
Switch/dial position
Door position
Mode door
In
ta
k
e
do
or
Air mix door
Ce
nt
e
r v
e
n
til
at
o
r a
n
d
de
fr
ost
e
r
do
or
S
u
b
de
fros
te
r do
or
Si
de
v
e
n
til
at
o
r
do
or
Fo
ot doo
r
Driver side
Pa
ss
en
ge
r si
de
AUTO switch
AUTO
—
—
—
MODE switch
DEF switch
REC switch
*
—
—
—
—
FRE switch
*
Temperature control
dial (Driver side)
DUAL
switch:
OFF
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
Temperature control
dial (Driver side)
DUAL
switch:
ON
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
Temperature control
dial (Passenger side)
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
ON·OFF switch
OFF
—
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Front foot
Defroster
Center
Side
V/D*
40%
35%
—
25%
VENT
54%
46%
—
—
B/L
31%
40%
29%
—
SYSTEM
HAC-29
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*: These positions are applied only to models for Europe and Russia.
Without rear ventilator, with rear foot
With rear ventilator, with rear foot
AUTOMATIC AIR CONDITIONING SYSTEM : Cooling Fan Control
INFOID:0000000010503110
DESCRIPTION
A/C auto amp. controls the cooling fan operation request according to the refrigerant pressure status and vehi-
cle speed status.
NOTE:
For an overview of the cooling fan and information about control, refer to
(HR engine models),
ECM-74, "COOLING FAN CONTROL : System Description"
ECM-654, "COOLING FAN CONTROL : System Description"
(MR20DD engine
models),
ECK-34, "COOLING FAN CONTROL : System Description"
"COOLING FAN CONTROL : System Description"
(R9M engine models).
CONTROL OUTLINE
• A/C auto amp. receives the refrigerant pressure sensor signal from ECM via CAN communication, and the
vehicle speed signal from the combination meter via CAN communication.
ALL*
21%
34%
31%
14%
FOOT
—
10%
58%
32%
D/F
—
9%
43%
48%
DEF
—
10%
—
90%
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Front foot
Defroster
Center
Side
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Foot
Defroster
Center
Side
Front
Rear
V/D
40%
35%
—
—
25%
VENT
54%
46%
—
—
—
B/L
33%
40%
16%
11%
—
ALL
22%
35%
16%
11%
16%
FOOT
—
11%
32%
25%
32%
D/F
—
8%
24%
19%
49%
DEF
—
10%
—
—
90%
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Foot
Defroster
Front
Rear
Front
Rear
Center
Side
V/D
39%
27%
11%
—
—
23%
VENT
47%
38%
15%
—
—
—
B/L
25%
34%
13%
18%
10%
—
ALL
21%
27%
11%
20%
10%
11%
FOOT
—
7%
4%
38%
24%
27%
D/F
—
6%
2%
30%
17%
45%
DEF
—
8%
2%
—
—
90%
HAC-30
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
• A/C auto amp. sets one of the optionally determined stages according to the received refrigerant pressure
sensor signal and vehicle speed signal.
NOTE:
For the rules that prescribe the predetermined stages, refer to the following figures.
• Vehicle speed stages
Vehicle speed [Km/h (MPH)]
-
: 12 (7.5)
-
: 20 (12)
-
: 72 (45)
-
: 80 (50)
• Refrigerant pressure stages
Refrigerant pressure [MPa (bar, kg/cm
2
, psi)]
-
: 0.7 (7, 7.14, 102)
-
: 1.0 (10, 10.2, 145)
-
: 1.28 (12.8, 13.1, 186)
-
: 1.58 (15.8, 16.1, 229)
-
: 1.88 (18.8, 19.2, 273)
-
: 2.08 (20.8, 21.2, 302)
• The requested cooling fan operation strength (0%, 40%, 100%%) is determined as shown in the following
table according to the combination of these two stages, and the request signal is transmitted to ECM via
CAN communication.
Cooling fan operation strength
Unit: %
AUTOMATIC AIR CONDITIONING SYSTEM : Door Motor Starting Position Reset
Control
INFOID:0000000010503109
• Step motors are used for the mode door motor air mix door motor (driver side/passenger side), and intake
door motor.
• Because the step motors do not have position detection mechanisms, there may be a deviation between the
door position recognized by A/C auto amp. and the actual door position.
Therefore, A/C auto amp. performs motor zero position reset for aligning its recognized door position with
the actual door position.
• The reset signal is transmitted from A/C auto amp. to the air mix door motor (driver side/passenger side),
mode door motor, and intake door motor, which then perform zero position reset.
• After any of the following conditions is met, A/C auto amp. performs motor zero position reset when the igni-
tion switch is next turned ON.
- The battery terminal is disconnected and then reconnected.
- The travel distance reaches 3,000 km (1846 miles). [Performed every 3,000 km (1846 miles).]
• If A/C auto amp., air mix door motor (driver side, passenger side), mode door motor, or intake door motor is
removed, it is necessary to perform motor zero position reset using CONSULT.
JMIIA3568GB
JMIIA3569GB
—
Refrigerant pressure stages
1
2
3
4
Vehicle speed stag-
es
1
40
40
100
100
2
40
40
100
100
3
0
0
0
100
SYSTEM
HAC-31
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
AUTOMATIC AIR CONDITIONING SYSTEM : Fail-safe
INFOID:0000000010502850
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp. and A/C control for 30 seconds or longer, air con-
ditioning is controlled under the following conditions: A/C auto amp. is controlled in the setting state before the
communication error occurs for following setting.
• Set temperature
• Air outlet
• Blower fan speed
• Air inlet
• A/C switch
PTC HEATER CONTROL SYSTEM
PTC HEATER CONTROL SYSTEM : System Description
INFOID:0000000010499351
SYSTEM DIAGRAM
DESCRIPTION
• BCM performs PTC relay ON/OFF control based on engine speed, engine coolant temperature, electrical
power cut freeze signal (permission signal, retention signal, stop signal), blower motor operation state sig-
nal, front window defogger state signal, ambient temperature signal, battery voltage, and electrical load state
(high beam request, low beam request, and others).
• When PTC relay turns ON, power supply is supplied to PTC heater. Heating element is heated and air flow
temperature is increased. Heating is available for a period of time until engine coolant temperature is
increased when engine starts cold in cold climate.
• Idle up request signal is transmitted from BCM to ECM while PTC heater operates. Idle speed is increased,
warming-up is facilitated, and battery electric power is obtained.
• Electric power supplied to PTC heating element is subject to PTC relay control conditions.
NOTE:
PTC heater operation depends on ambient temperature and battery voltage. PTC heater is ON when ambient
temperature is 8
°
C or less. PTC heater is OFF when ambient temperature is 12
°
C (53.6
°
F) or more. PTC
heater is ON when battery voltage is 11.5 V or more. PTC heater is OFF when battery voltage is 11 V or less.
STOP/START SYSTEM
JMIIA3582GB
PTC heater
Operation
PTC relay-1
PTC relay-2
PTC relay-3
Electric power (W)
OFF
OFF
OFF
OFF
OFF
Approx. 0
PTC heater-1
LOW
ON
OFF
OFF
Approx. 333
PTC heater-2
MID
ON
ON
OFF
Approx. 666
PTC heater-3
HI
ON
ON
ON
Approx. 999
HAC-32
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
STOP/START SYSTEM : System Description
INFOID:0000000010499353
SYSTEM DIAGRAM
DESCRIPTION
• In the stop/start system, ECM performs integrated control based on the information from control units, sen-
sors and switches. For details, refer to
ECH-35, "STOP/START SYSTEM : System Description"
engine models),
ECM-79, "STOP/START SYSTEM : System Description"
39, "STOP/START SYSTEM : System Description"
: System Description (M/T models)"
(R9M engine M/T models) or
EC9-50, "STOP/START SYSTEM : Sys-
(R9M engine CVT models).
• A/C auto amp. transmits stop/start permit signal (permit) to ECM via CAN communication if it judges that the
comfort level in the passenger room can be maintained, even when engine stops while idling, based on each
sensor and the set temperature.
• A/C auto amp. receives operation status of stop/start system (stop/start status signal) from ECM via CAN
communication. When A/C auto amp. recognizes that stop/start system is operating based on the signal, it
changes control characteristics of air flow and inlet.
• When A/C auto amp. judges that the comfort level in the passenger room cannot be maintained while stop/
start function operates, it cancels stop/start permit signal (permit) and requests ECM to restart engine. Also,
when switch operation of A/C control (DEF switch) occurs, it also requests engine restart to ECM as well.
Stop/start Permission Condition Evaluated By A/C Auto Amp. (Before Stop/start Operation)
Before stop/start operation, when the following conditions are met, A/C auto amp. judges that stop/start sys-
tem operation is available and transmits stop/start permit signal to ECM via CAN communication.
• Outlet: Other than DEF (Enabled only when the ambient temperature is 25oC or less. When ambient tem-
perature is higher than 25
°
C (77
°
F), the outlet condition is not included in the conditions for judging that stop/
start is possible.)
• Air flow: Other than for maximum position
• Passenger room temperature: Becomes approx. 20
°
C (68
°
F) or more (when A/C switch is ON/OFF) or
approx. 30
°
C (86
°
F) or less (only when A/C switch is ON).
- When A/C switch is ON: 20
°
C (68
°
F) or more, and 30
°
C (86
°
F) or less.
- When A/C switch is OFF: 20
°
C (68
°
F) or more
JMIIA3571GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст