NISSAN TIIDA 2007 Service Repair Manual

HAC-88
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/O NAVI)]
INSPECTION AND ADJUSTMENT
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-185, "
Component Function Check".
If OK, continue the check.
CHECK A/C SWITCH
1. Press AUTO and A/C switches.
2. A/C switch LED will turn ON.
 Confirm that the compressor clutch engages (sound or visual inspection).
If NG, go to trouble diagnosis procedure for HAC-125, "
Magnet Clutch Diagnosis Procedure".
If OK, continue the check.
CHECKING AUTO MODE
1. Press AUTO switch.
2. Display should indicate AUTO.
 Confirm that discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures.
 If NG, go to trouble diagnosis procedure for HAC-163, "
Front Air Control Power and Ground Diagnosis Pro-
cedure", then if necessary, trouble diagnosis procedure for HAC-125, "Magnet Clutch Diagnosis Procedure".
 If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in XX-XX,
"*****" and perform tests as outlined to simulate driving conditions environment.
 If symptom appears, refer to HAC-86, "
How to Perform Trouble Diagnosis For Quick And Accurate Repair"
and perform applicable trouble diagnosis procedures.

FUNCTION INFORMATION
HAC-89
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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FUNCTION DIAGNOSIS
FUNCTION INFORMATION
Component Part LocationINFOID:0000000001547388
ENGINE COMPARTMENT
PASSENGER COMPARTMENT
1. Compressor (magnet clutch) F3 2. Refrigerant pressure sensor E17 3. Ambient sensor E60
AWIIA0602ZZ

HAC-90
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
FUNCTION INFORMATION
1. Variable blower control M90, M91 2. Intake door motor M89 3. In-vehicle sensor M93
4. Air mix door motor M88 5. Intake sensor M92 6. Mode door motor M87
7. Sunload sensor M94 8. Front blower motor M62 9. Front air control M50, M51
AWIIA0282ZZ

REFRIGERATION SYSTEM
HAC-91
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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REFRIGERATION SYSTEM
Refrigerant CycleINFOID:0000000001547390
Refer to XX-XX, "*****".
Refrigerant System ProtectionINFOID:0000000001547391
Refer to XX-XX, "*****".

HAC-92
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-93
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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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

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

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-95
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Switches And Their Control Function INFOID:0000000001547396
SJIA0700E
AWIIA0280GB

HAC-96
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM
System DescriptionINFOID:0000000001547398
Refer to LAN-13, "System Description".

DIAGNOSIS SYSTEM (BCM)
HAC-97
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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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.