Condition NISSAN TEANA 2008 Service Manual

HAC-128
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
 Decision (A/C auto amp. indicated value and motor opening angle comparison)
Operation
The A/C auto amp. receives data from each of the sensors. The A/C auto amp. sends mode door, the air mix
door and the intake door opening angle data to the mode door motor LCU, the air mix door motor LCUs and
the intake door motor LCU.
The mode door motor, the air mix door motors and the intake door motor read their respective signals accord-
ing to the address signal. Opening angle indication signals received from the A/C auto amp. and each of the
motor position sensors is 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 new selection
data is returned to the A/C auto amp.
Transmission Data and Transmission Order
A/C auto amp. data is transmitted consecutively to each of the door motors following the form as shown in the
figure below.
START: Initial compulsory signal is sent to each of the door motors.
ADDRESS: Data sent from the A/C auto amp. is selected according to data-based decisions made by the mode door
motor, the air mix door motors and the intake door motor.
 If the addresses are identical, the opening angle data and error check signals are received by the door motor
LCUs. The LCUs then make the appropriate error decision. If the opening angle data has no error, door con-
trol begins.
 If an error exists, the received data is rejected and the corrected data received. Finally, door control is based
upon the corrected opening angle data.
OPENING ANGLE:
 Data that shows the indicated door opening angle of each door motor.
ERROR CHECK: In this procedure, transmitted and received data is checked for errors. Error data is then compiled. The error
check prevents corrupted data from being used by the mode door motor, the air mix door motors and the
intake door motor. Error data can be related to the following symptoms.
- Malfunction of electrical frequency
- Poor electrical connections
- Signal leakage from transmission lines
- Signal level fluctuation
STOP SIGNAL:
JSIIA1130GB
JSIIA1131GB

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-129
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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 At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered
to the A/C auto amp. This completes one data transmission and control cycle.
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Component Part Location
INFOID:0000000003884706
ENGINE COMPARTMENT
JSIIA1132GB

HAC-130
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutch) 3. Ambient sensor
JPIIA0992ZZ

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-131
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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1. Intake door motor 2. Air mix door motor (passenger side) 3. Air mix door motor (driver side)
4. Mode door motor 5. Sunload sensor 6. In-vehicle sensor
7. A/C auto amp. 8. Intake sensor 9. Blower motor
JPIIA0993ZZ

HAC-132
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Component Description
INFOID:0000000003884707
WITH INTELLIGENT AIR CONDITIONER SYSTEM
WITH INTELLIGENT AIR CONDITIONER SYSTEM : System DiagramINFOID:0000000003884703
CONTROL SYSTEM
The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs. The
relationship of these components is as shown in the figure below:
Component Description
Refrigerant pressure sensorEC-348, "
Description"
CompressorHAC-197, "Description"
Ambient sensorHAC-166, "Description"
Intake door motorHAC-188, "Description"
Air mix door motor (driver side)HAC-181, "Description"
Air mix door motor (passenger side)HAC-183, "Description"
Mode door motorHAC-185, "Description"
Sunload sensorHAC-178, "Description"
In-vehicle sensorHAC-169, "Description"
A/C auto amp. HAC-192, "Description"
Intake sensorHAC-172, "Description"
Blower motorHAC-193, "Description"
JPIIA1021GB

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-133
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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WITH INTELLIGENT AIR CONDITIONER SYSTEM : System DescriptionINFOID:0000000003884705
CONTROL OPERATION
Display
The operation status of the system is displayed on the screen.
Preset Switch
MODE Switch
The air discharge outlets are controlled with this switch.
Temperature Control Dial (Driver Side)
The set temperature is increased or decreased with this dial.
Temperature Control Dial (Passenger Side)
 The set temperature is increased or decreased with this dial.
 When the temperature control dial is turned, DUAL switch indicator is turned ON.
AUTO Switch
 The compressor, intake door, air mix doors, mode doors and blower speed are automatically controlled so
that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the operator.
 When pressing the AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automati-
cally controlled.
Defroster (DEF) Switch
Mode doors are set to the defrost position with this switch. Also, intake door is set to the outside air position,
and compressor turns ON.
JPIIA1022GB
JPIIA1005ZZ
1.Temperature control dial (passenger
side)2. MODE switch 3. CLEAN switch
4. Fan control dial 5. Intake switch 6. A/C switch
7. Temperature control dial (driver side) 8. AUTO switch 9. Defroster (DEF) switch
10. OFF switch 11. Rear window defogger switch 12. DUAL switch

HAC-134
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
CLEAN Switch
 When the blower motor is operated, the indicator lamp of the clean switch illuminates by pressing the clean
switch. The air inlets are fixed to recirculation for approximately 5 minutes. After approximately 5 minutes
have passed, they change to the automatic re-circulation control system. The Plasmacluster ion generation
function operates for approximately 30 minutes (Blower motor operate) in clean mode after the clean switch
is ON. After approximately 30 minutes have passed, the vehicle is driven between ion control mode (approx-
imately 15 minutes) and clean mode (approximately 30 minutes) alternately.
NOTE:
When the clean switch is not ON
 Ignition switch: OFF
 Blower motor: OFF
 Mode position: Defroster (DEF)
 Ambient temperature: At about 0°C or below (Reactivate at about 2°C or above)
 When the gas sensor is malfunctioning
 The Plasmacluster ion generation function changes automatically to the ion control mode by turning the
clean switch OFF, and then operates for approximately 15 minutes. Then, it is operated between the clean
mode (approximately 15 minutes) and clean mode (approximately 15 minutes) alternately.
 When the clean switch is ON, the A/C switch is also turned ON in synchronization with the clean switch.
NOTE:
The A/C switch becomes deactivate and the clean switch is turned OFF in synchronization with the A/C
switch by the clean switch interlocking movement change function.
 Press the intake switch or defroster (DEF) switch when releasing the automatic recirculation control system.
A/C Switch
Compressor turns ON or OFF with this switch.
(Pressing the A/C switch when the A/C switch is ON turns OFF the A/C switch and compressor.)
Fan Control Dial
The blower speed is manually controlled with this dial. Seven speeds are available for manual control (as
shown on the display screen).
OFF Switch
Compressor and blower turn OFF, intake door and the mode doors are automatically controlled.
Rear Window Defogger Switch
When indicator is ON, rear window is defogged.
Intake Switch
 When the intake switch is ON, the intake switch indicator is turned ON, and air inlet is set to REC.
 When the intake switch is pressed again, the intake switch indicator is turned OFF, and air inlet is set to FRE.
 When the intake switch indicator is turned OFF, shifting mode position to DEF, intake switch is automatically
turned OFF (set to FRE mode). REC mode can be re-entered by pressing intake switch again.
DUAL Switch
 When the DUAL switch indicator is ON, the driver side and passenger side, temperature can each be set
independently.
 When the DUAL switch indicator is OFF, the driver side setting temperature is applied to both sides.

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-135
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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DISCHARGE AIR FLOW
JPIIA0884GB

HAC-136
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
SWITCHES AND THEIR CONTROL FUNCTION
AIR CONDITIONER LAN CONTROL SYSTEM
The LAN (Local Area Network) system consists of the A/C auto amp., the mode door motor, the air mix door
motors and the intake door motor.
JPIIA0885GB
JSIIA1190GB

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-137
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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A configuration of these components is as shown in the figure below.
SYSTEM CONSTRUCTION
A small network exists between the A/C auto amp., the mode door motor, the air mix door motor and the intake
door motor. The A/C auto amp. and motors are connected by data transmission lines and motor power supply
lines. The LAN network is built through the ground circuits of each door motor.
Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted
through the data transmission lines connecting the A/C auto amp. and each door motor.
The following functions are contained in LCUs built into the mode door motor, the air mix door motors and the
intake door motor.
 Address
 Motor opening angle signals
 Data transmission
 Motor stop and drive decision
 Opening angle sensor (PBR function)
 Comparison
 Decision (A/C auto amp. indicated value and motor opening angle comparison)
Operation
The A/C auto amp. receives data from each of the sensors. The A/C auto amp. sends mode door, the air mix
door and the intake door opening angle data to the mode door motor LCU, the air mix door motor LCUs and
the intake door motor LCU.
The mode door motor, the air mix door motors and the intake door motor read their respective signals accord-
ing to the address signal. Opening angle indication signals received from the A/C auto amp. and each of the
motor position sensors is 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 new selection
data is returned to the A/C auto amp.
Transmission Data and Transmission Order
A/C auto amp. data is transmitted consecutively to each of the door motors following the form as shown in the
figure below.
JSIIA1129GB
JSIIA1130GB
JSIIA1131GB