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HAC-92
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AUTOMATIC AIR CONDITIONER SYSTEM
AUTOMATIC AIR CONDITIONER SYSTEM
Control System DiagramINFOID:0000000001547392
CONTROL SYSTEM
The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:
Control System DescriptionINFOID:0000000001547393
CONTROL OPERATION
AWIIA0480ZZ
AWIIA0279GB
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![NISSAN TIIDA 2007 Service Repair Manual AUTOMATIC AIR CONDITIONER SYSTEM
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DISPLAY
Displays the operational status of the system.
AUTO SWITCH
T NISSAN TIIDA 2007 Service Repair Manual AUTOMATIC AIR CONDITIONER SYSTEM
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DISPLAY
Displays the operational status of the system.
AUTO SWITCH
T](/manual-img/5/57395/w960_57395-3425.png)
AUTOMATIC AIR CONDITIONER SYSTEM
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DISPLAY
Displays the operational status of the system.
AUTO SWITCH
The compressor, intake doors, air mix doors, outlet 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 AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automatically
controlled. (Inlet is automatically controlled only when FRE or REC switch is OFF.)
TEMPERATURE CONTROL SWITCH (POTENTIO TEMPERATURE CONTROL)
Increases or decreases the set temperature.
RECIRCULATION (REC) SWITCH
When REC switch is ON, REC switch indicator turns ON, air inlet is fixed to REC, and compressor will turn
ON.
When FRE switch is turned ON, air outlet switches to D/F or DEF position, or when compressor is turned
from ON to OFF, REC switch is automatically turned OFF (fixed to FRE mode).
FRESH (FRE) SWITCH
When FRE switch is ON, FRE switch indicator turns ON, and air inlet is fixed to FRE.
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.
DEFROSTER (DEF) SWITCH
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position,
and compressor will turn ON.
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
OFF SWITCH
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot position.
A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch when the A/C switch is ON will turn off the A/C switch and compressor.)
MODE SWITCH
Controls the air discharge outlets.
When air outlet switches to D/F position, compressor will turn ON and fixed to REC mode.
BLOWER MOTOR SWITCH
Manually control the blower speed. Four speeds are available for manual control (as shown on the display).
1. Blower motor switch 2. Defroster (DEF) switch 3. Rear window defogger switch
4. Display 5. A/C switch 6. OFF switch
7. Temperature control switch 8. AUTO switch 9. Recirculation (REC) switch
10. Fresh (FRE) switch 11. MODE switch
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HAC-94
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
AUTOMATIC AIR CONDITIONER SYSTEM
MAGNET CLUTCH CONTROL
When A/C switch, AUTO switch or DEF switch is pressed, front air control inputs compressor ON signal to
BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to
IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.
Discharge Air FlowINFOID:0000000001547394
AWIIA0277GB
Mode door positionAir outlet/distribution
Vent Foot Defroster
100% — —
56% 44% —
16% 64% 20%
16% 53% 31%
17% — 83%
Airflow always present at driver and passenger side demisters
WJIA2190E
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AUTOMATIC AIR CONDITIONER SYSTEM
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Switches And Their Control Function INFOID:0000000001547396
SJIA0700E
AWIIA0280GB
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HAC-96
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CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM
System DescriptionINFOID:0000000001547398
Refer to LAN-13, "System Description".
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![NISSAN TIIDA 2007 Service Repair Manual DIAGNOSIS SYSTEM (BCM)
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DIAGNOSIS SYSTEM (BCM)
CONSULT-III Function (BCM)INFOID:0000000001547400
CONSULT- NISSAN TIIDA 2007 Service Repair Manual DIAGNOSIS SYSTEM (BCM)
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DIAGNOSIS SYSTEM (BCM)
CONSULT-III Function (BCM)INFOID:0000000001547400
CONSULT-](/manual-img/5/57395/w960_57395-3429.png)
DIAGNOSIS SYSTEM (BCM)
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DIAGNOSIS SYSTEM (BCM)
CONSULT-III Function (BCM)INFOID:0000000001547400
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
DATA MONITOR
Display Item List
BCM diagnostic
test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM for
setting the status suitable for required operation, input/output signals are received
from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
Monitor item name “operation or
unit”Contents
IGN ON SW “ON/OFF” Displays “IGN Position (ON)/OFF, ACC Position (OFF)” status as judged from ignition switch signal.
FAN ON SIG “ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower motor switch signal.
COMP ON SIG “ON/OFF” Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
Page 3431 of 5883
![NISSAN TIIDA 2007 Service Repair Manual HAC-98
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
SELF-DIAGNOSIS FUNCTION
Front Air Control Self-DiagnosisINFOID:0000000001547401
DESCRIPTION
The self-diagnostic s NISSAN TIIDA 2007 Service Repair Manual HAC-98
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
SELF-DIAGNOSIS FUNCTION
Front Air Control Self-DiagnosisINFOID:0000000001547401
DESCRIPTION
The self-diagnostic s](/manual-img/5/57395/w960_57395-3430.png)
HAC-98
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
SELF-DIAGNOSIS FUNCTION
Front Air Control Self-DiagnosisINFOID:0000000001547401
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from usual control to the self-diagnostic system is accomplished by
starting the engine (turning the ignition switch ON) and pressing OFF switch for at least 5 seconds. The OFF
switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be cancelled by either pressing AUTO switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished by means of pushing front air control switches, as required.
Additionally shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of pushing blower
motor switch (UP: ).
FUNCTION CONFIRMATION PROCEDURE
1.SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
AWIIA0284GB
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CAUTION:
If battery voltage drops below 12V during diagnosis STEP-3, door motor NISSAN TIIDA 2007 Service Repair Manual SELF-DIAGNOSIS FUNCTION
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CAUTION:
If battery voltage drops below 12V during diagnosis STEP-3, door motor](/manual-img/5/57395/w960_57395-3431.png)
SELF-DIAGNOSIS FUNCTION
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CAUTION:
If battery voltage drops below 12V during diagnosis STEP-3, door motor speed becomes slower and
as a result, the system may generate an error even when operation is usual. To avoid this, start engine
before performing this diagnosis.
>> GO TO 2.
2.STEP-1: LED AND DISPLAY ARE CHECKED
Check display screen (1) and LED illumination (2).
OK or NG
OK >> GO TO 3.
NG >> Malfunction OFF switch or AUTO switch. Refer to HAC-
311, "Self-Diagnosis".
3.CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
Press temperature control switch (UP: ).
Advance to self
-diagnosis STEP-2?
YES >> GO TO 4.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
4.CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Press temperature control switch (DOWN: ).
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
5.STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Press temperature control switch (UP: ).
Does code No. 20 appear on the display?
YES >> GO TO 6.
NO >> GO TO 13.
6.STEP-3: AIR MIX DOOR AND MODE DOOR POSITIONS ARE CHECKED
Press temperature control switch (UP: ).
Does code No. 30 appear on the display?
YES >> GO TO 7.
NO >> GO TO 14.
AWIIA0285ZZ
SJIA0737E
SJIA0738E