Page 2777 of 5121
INTAKE DOOR CONTROL SYSTEM
HAC-149
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INTAKE DOOR CONTROL SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Diagram
INFOID:0000000003884722
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Description
INFOID:0000000003884724
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
JPIIA1023GB
JSIIA1133GB
Page 2778 of 5121
![NISSAN TEANA 2008 Service Manual HAC-150
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
INTAKE DOOR CONTROL SYSTEM
Intake door position is basically set to the FRE when the FRE indi-
cator is ON or DEF switch is ON.
Intake door posi NISSAN TEANA 2008 Service Manual HAC-150
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
INTAKE DOOR CONTROL SYSTEM
Intake door position is basically set to the FRE when the FRE indi-
cator is ON or DEF switch is ON.
Intake door posi](/manual-img/5/57391/w960_57391-2777.png)
HAC-150
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
INTAKE DOOR CONTROL SYSTEM
Intake door position is basically set to the FRE when the FRE indi-
cator is ON or DEF switch is ON.
Intake door position is basically set to the REC when the REC indi-
cator is ON.
The intake door automatic control selects the FRE, the 20% FRE,
or the REC depending on the target air mix door opening angle,
based on in-vehicle temperature, ambient temperature, and sun-
load.
WITH INTELLIGENT AIR CONDITIONER SYSTEM
WITH INTELLIGENT AIR CONDITIONER SYSTEM : System DiagramINFOID:0000000003884723
WITH INTELLIGENT AIR CONDITIONER SYSTEM : System DescriptionINFOID:0000000003884725
The intake door is automatically controlled by the ambient atmospheric CO and NO2, 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 NO2, ambient
temperature, the intake air temperature and the in-vehicle temperature. When DEF or OFF switches are
pressed, the A/C auto amp. sets the intake door at the FRE position.
JPIIA0634GB
JPIIA1024GB
Page 2779 of 5121
INTAKE DOOR CONTROL SYSTEM
HAC-151
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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Intake Door Control Specification
Intake door position is basically set to the FRE when the intake
indicator is OFF or DEF switch is ON.
Intake door position is basically set to the REC when the intake
indicator is ON.
The intake door automatic control selects the FRE, the 20% FRE,
or the REC depending on the target air mix door opening angle,
based on in-vehicle temperature, ambient temperature, and sun-
load.
Automatic Re-circulation Control System
In addition to the regular automatic control, intake door condition is
controlled by gas sensor output signal when auto recirculation 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.
JSIIA1133GB
JPIIA0634GB
ZJIA1166E
Page 2780 of 5121
![NISSAN TEANA 2008 Service Manual HAC-152
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003884727
System DescriptionINFOID:0000000003884728
Blower speed NISSAN TEANA 2008 Service Manual HAC-152
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003884727
System DescriptionINFOID:0000000003884728
Blower speed](/manual-img/5/57391/w960_57391-2779.png)
HAC-152
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003884727
System DescriptionINFOID:0000000003884728
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
By pressing the AUTO switch, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
SYSTEM OPERATION
System Operation
For air flow, the manual selection (1-7) with the fan control dial has priority.
If the AUTO switch is pressed or if the DEF switch is pressed while in the OFF condition, it changes to the
automatic control by A/C auto amp.
When increasing the air flow, it changes the duty ratio of the blower motor drive signal to prevent the air flow
from suddenly increasing.
There are the following types of air flow control: starting air flow control, starting air flow control at low cool-
ant temperature, starting air flow control at high in-vehicle temperature, and air flow control at actuator oper-
ation in addition to manual control, normal automatic air flow control.
Normal Automatic Air Flow Control
When the target temperature is set by the temperature control dial of A/C control, the A/C auto amp. per-
forms the calculation and decides the target according to the signal from each sensor.
The A/C auto amp. changes the duty ratio of blower motor drive signal and controls the air flow continuously
so that the air flow becomes the target air flow.
The minimum air flow will change according to the sunload when the air discharge outlet is VENT or B/L.
Fan Speed Control Specification
JPIIA0502GB
JPIIA0635GB
Page 2781 of 5121
![NISSAN TEANA 2008 Service Manual BLOWER MOTOR CONTROL SYSTEM
HAC-153
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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When starting the automatic control of air flow, the system NISSAN TEANA 2008 Service Manual BLOWER MOTOR CONTROL SYSTEM
HAC-153
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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When starting the automatic control of air flow, the system](/manual-img/5/57391/w960_57391-2780.png)
BLOWER MOTOR CONTROL SYSTEM
HAC-153
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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When starting the automatic control of air flow, the system gradually increases the duty ratio of the blower
motor drive signal to prevent too much air from blowing.
The time period from when the air flow changes from LO to HI is approximately 8 seconds.
It becomes the starting air flow control at low coolant temperature according to the calculation result of the A/
C auto amp. and engine coolant temperature [approximately 56°C (133°F) or less] during the automatic air
flow control.
Do not perform the starting air flow control when the air discharge outlet is set to DEF.
Starting Fan Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower does not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient temperature and engine coolant temperature.
In the most extreme case (very low ambient temperature) the blower start delay is 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed increases to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed rises gradu-
ally to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
Page 2782 of 5121
![NISSAN TEANA 2008 Service Manual HAC-154
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
MAGNET CLUTCH CONTROL SYSTEM
MAGNET CLUTCH CONTROL SYSTEM
System DiagramINFOID:0000000003884729
System DescriptionINFOID:0000000003884730
The A/C au NISSAN TEANA 2008 Service Manual HAC-154
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
MAGNET CLUTCH CONTROL SYSTEM
MAGNET CLUTCH CONTROL SYSTEM
System DiagramINFOID:0000000003884729
System DescriptionINFOID:0000000003884730
The A/C au](/manual-img/5/57391/w960_57391-2781.png)
HAC-154
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
MAGNET CLUTCH CONTROL SYSTEM
MAGNET CLUTCH CONTROL SYSTEM
System DiagramINFOID:0000000003884729
System DescriptionINFOID:0000000003884730
The A/C auto amp. controls compressor operation by ambient temperature, intake air temperature and signal
from ECM.
SYSTEM OPERATION
When the A/C switch, the AUTO switch, or the DEF switch is pressed, A/C auto amp. transmit the A/C switch
signal and blower fan motor switch signal to the ECM, via CAN communication.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If the ECM judges that the compressor can be turned ON, it sends A/C com-
pressor request signal to the IPDM E/R, via CAN communication.
Upon receipt of A/C compressor request signal from the ECM, the IPDM E/R turns the A/C relay ON to oper-
ate the compressor.
When sending A/C compressor request signal to the IPDM E/R via CAN communication line, the ECM simul-
taneously sends A/C compressor feedback signal to A/C auto amp. via CAN communication line.
The ECM sends A/C compressor feedback signal to A/C auto amp., then, uses input A/C compressor feed-
back signal to control air inlet.
Compressor Protection Control
The ECM makes the A/C relay turn OFF and stops the compressor when pressure on the high-pressure side
detected by the refrigerant pressure sensor is over approximately 3,119 kPa (31.19bar, 31.8 kg/cm
2, 452 psi),
or below approximately 118 kPa (1.18bar, 1.2 kg/cm
2, 17 psi).
Low Temperature Protection Control
Turn the A/C relay to OFF and stop the compressor by the signal from the A/C auto amp according to the
evaporator passing air temperature detected by the intake sensor and the ambient temperature detected by
the ambient sensor.
JPIIA0504GB
Page 2783 of 5121
CAN COMMUNICATION SYSTEM
HAC-155
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CAN COMMUNICATION SYSTEM
System DescriptionINFOID:0000000003884731
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto each vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only. For details, refer to
LAN-22, "
CAN System Specification Chart".
Page 2784 of 5121
![NISSAN TEANA 2008 Service Manual HAC-156
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
DIAGNOSIS SYSTEM (HVAC)
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : CONSULT-III NISSAN TEANA 2008 Service Manual HAC-156
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
DIAGNOSIS SYSTEM (HVAC)
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : CONSULT-III](/manual-img/5/57391/w960_57391-2783.png)
HAC-156
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
DIAGNOSIS SYSTEM (HVAC)
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : CONSULT-III Function
INFOID:0000000003884732
CONSULT-III can display each diagnosis item using the diagnosis test modes shown as per the following.
CONSULT-III application items
SELF DIAGNOSTIC RESULT
Refer to HAC-212, "WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : DTC Index".
Display Item List
Diagnosis mode Description
ECU Identification Displays the A/C auto amp. number.
Self Diagnostic Result Displays the diagnosis results judged by A/C auto amp.
Data Monitor Displays A/C auto amp. input/output data in real time.
Active Test The signals used to activate each device are forcibly supplied from A/C auto amp.
Work SupportChanges the setting for each system function.
Temperature setting trimmer
Inlet port memory function (FRE)
Inlet port memory function (REC)
Foot position setting trimmer
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
U1000 CAN COMM CIRCUITWhen A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.CAN communication system
U1010 CONTROL UNIT (CAN)When detecting error during the initial
diagnosis of CAN controller of A/C auto
amp.A/C auto amp.
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sen-
sor −44°C (−47°F) or less Ambient sensor
A/C auto amp.
Harness and connector
(Ambient sensor circuit is open,
or there is a short in the circuit) B257C AMB TEMP SEN (OPEN)Detected temperature at ambient sen-
sor 100°C (212°F) or more
B2578IN CAR SENSOR (OUT OF RANGE
[LOW])Detected temperature at in-vehicle sen-
sor −44°C (−47°F) or less In-vehicle sensor
A/C auto amp.
Harness and connector
(In-vehicle sensor circuit is open,
or there is a short in the circuit) B2579IN CAR SENSOR (OUT OF RANGE
[HI])Detected temperature at in-vehicle sen-
sor 100°C (212°F) or more
B2581 EVAP TEMP SEN (SHORT)Detected temperature at intake sensor
−33°C (−27°F) or less Intake sensor
A/C auto amp.
Harness and connector
(Intake sensor circuit is open, or
there is a short in the circuit) B2582 EVAP TEMP SEN (OPEN)Detected temperature at intake sensor
69°C (156°F) or more
B2630
*SUNLOAD SEN (SHORT)Detected calorie at sunload sensor 64.7
w/m2 (30 kcal/m2·h) or less Sunload sensor
A/C auto amp.
Harness and connector
(Sunload sensor circuit is open,
or there is a short in the circuit) B2631
*SUNLOAD SEN (OPEN)Detected calorie at sunload sensor
2832 w/m2 (1304 kcal/m2·h) or more
B2632 DR AIRMIX ACTR (SHORT)Air mix door PBR (driver side) position
5% or less Air mix door motor (driver side)
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted) B2633 DR AIRMIX ACTR (OPEN)Air mix door PBR (driver side) position
95% or more