Page 2745 of 5121
COMPRESSOR CONTROL FUNCTION
HAC-117
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FUNCTION DIAGNOSIS
COMPRESSOR CONTROL FUNCTION
DescriptionINFOID:0000000003943704
PRINCIPLE OF OPERATION
Compressor is not activated.
Functional circuit diagram
Functional initial inspection chart
CAN (1) : A/C switch signal
: Blower fan motor switch signalCAN (2) : A/C Compressor request signal
JPIIA0484GB
Control unit Diagnosis ItemLocation
ABCD
A/C auto amp.
“HVAC”Self-diagnosis Yes
Data monitor Yes
Active test Yes Yes
ECM
“ENGINE”Self-diagnosis
(CAN system diagnosis)Ye s
Data monitor Yes Yes
IPDM E/R“IPDM E/R”Self-diagnosis
(CAN system diagnosis)Ye s
Data monitor Yes
Auto active testYe s
Page 2746 of 5121
HAC-118
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
Fail-Safe
INFOID:0000000003926398
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioner is controlled under the following conditions:
Component Part LocationINFOID:0000000003884694
ENGINE COMPARTMENT
Compressor : ON
Air outlet : AUTO
Air inlet : FRE (Fresh)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs
Page 2747 of 5121
COMPRESSOR CONTROL FUNCTION
HAC-119
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PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutch) 3. Ambient sensor
JPIIA0992ZZ
Page 2748 of 5121
HAC-120
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
Component’s Role
INFOID:0000000003884695
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
Page 2749 of 5121
COMPRESSOR CONTROL FUNCTION
HAC-121
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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"
Page 2750 of 5121
HAC-122
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
AUTOMATIC AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Diagram
INFOID:0000000003884702
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:
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Description
INFOID:0000000003884704
CONTROL OPERATION
Display
The operation status of the system is displayed on the screen.
JPIIA1020GB
JSIIA0058GB
Page 2751 of 5121
![NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-123
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MODE Switch
The air discharge outlets are controlled with this switch. NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-123
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MODE Switch
The air discharge outlets are controlled with this switch.](/manual-img/5/57391/w960_57391-2750.png)
AUTOMATIC AIR CONDITIONER SYSTEM
HAC-123
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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.
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.
JPIIA1006ZZ
1.Temperature control dial (passenger
side)2. MODE switch 3. Fresh (FRE) switch
4. Fan control dial 5. Recirculation (REC) 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
Page 2752 of 5121
HAC-124
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
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.
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.