Page 2641 of 5121
COMPRESSOR CONTROL FUNCTION
HAC-13
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Fail-SafeINFOID:0000000003901219
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-
ditioner is controlled under the following conditions:
Component Part LocationINFOID:0000000003846299
ENGINE COMPARTMENT
Compressor : ON
Air outlet : AUTO
Air inlet : FRE (Fresh)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Page 2642 of 5121
HAC-14
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutch) 3. Ambient sensor
JPIIA0992ZZ
Page 2643 of 5121
COMPRESSOR CONTROL FUNCTION
HAC-15
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Component’s RoleINFOID:0000000003846300
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
JPIIA0997ZZ
Page 2644 of 5121
HAC-16
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
Component Description
Refrigerant pressure sensorEC-348, "
Description"
CompressorHAC-72, "Description"
Ambient sensorHAC-44, "Description"
Intake door motorHAC-63, "Description"
Air mix door motor (driver side)HAC-56, "Description"
Air mix door motor (passenger side)HAC-58, "Description"
Mode door motorHAC-60, "Description"
Sunload sensorHAC-53, "Description"
In-vehicle sensorHAC-47, "Description"
A/C auto amp. HAC-67, "Description"
Intake sensorHAC-50, "Description"
Blower motorHAC-68, "Description"
Page 2645 of 5121
AUTOMATIC AIR CONDITIONER SYSTEM
HAC-17
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AUTOMATIC AIR CONDITIONER SYSTEM
System DiagramINFOID:0000000003846301
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:
System DescriptionINFOID:0000000003846302
CONTROL OPERATION
Display
The operation status of the system is displayed on the screen.
JPIIA0878GB
JPIIA0879ZZ
Page 2646 of 5121
![NISSAN TEANA 2008 Service Manual HAC-18
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
A/C Control
MODE Switch
The air discharge outlets are controlled with this switch.
Temperature Control Switch (Dr NISSAN TEANA 2008 Service Manual HAC-18
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
A/C Control
MODE Switch
The air discharge outlets are controlled with this switch.
Temperature Control Switch (Dr](/manual-img/5/57391/w960_57391-2645.png)
HAC-18
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
A/C Control
MODE Switch
The air discharge outlets are controlled with this switch.
Temperature Control Switch (Driver Side)
The set temperature is increased or decreased with this switch.
Temperature Control Switch (Passenger Side)
The set temperature is increased or decreased with this switch.
When the temperature control switch is pressed, 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.
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, air inlet sets to FRE, and mode the position is set to foot position.
Rear Window Defogger Switch
When indicator is ON, rear window is defogged.
Recirculation (REC) Switch
When REC switch is ON, REC switch indicator turns ON, and air inlet is fixed to REC.
When REC switch is pressed for approximately 1.5 seconds or longer, REC and FRE switch indicators blink
twice. Then, automatic control mode is entered. Inlet status is displayed even during automatic control.
When FRE switch is turned ON, REC switch is automatically turned OFF (fixed to FRE mode). REC mode
can be re-entered by pressing REC switch again.
JPIIA0883ZZ
1.Temperature control switch (passen-
ger side)2. MODE switch 3. Recirculation (REC) switch
4. Fan control dial 5. Defroster (DEF) switch 6. AUTO switch
7.Temperature control switch (driver
side)8. A/C switch 9. Rear window defogger switch
10. OFF switch 11. Fresh (FRE) switch 12. DUAL switch
Page 2647 of 5121
AUTOMATIC AIR CONDITIONER SYSTEM
HAC-19
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P Fresh (FRE)Switch
When FRE switch is ON, FRE switch indicator turns ON, and air inlet is fixed to FRE.
When FRE switch is pressed for approximately 1.5 seconds or longer, REC and FRE switch indicators blink
twice. Then, automatic control mode is entered. Inlet status is displayed even during automatic control.
When REC switch is turned ON, FRE switch is automatically turned OFF (fixed to REC mode). FRE mode
can be re-entered by pressing FRE 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.
Page 2648 of 5121
HAC-20
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
DISCHARGE AIR FLOW
JPIIA1012GB