NISSAN LATIO 2011 Service Repair Manual

REFRIGERATION SYSTEMMTC-15
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REFRIGERATION SYSTEM
Refrigerant CycleINFOID:0000000005930835
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. T he refrigerant evaporation through the evaporator is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, when the A/C is s witched ON, the compressor runs continuously, and the
evaporator pressure, and temperature is controlled by the compressor to prevent freeze up.
Refrigerant System ProtectionINFOID:0000000005930836
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively hi gh or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrig-
erant pressure sensor detects the pressure inside t he refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side
detected by refrigerant pressure sensor is over about 2,746 kPa (27.46 bar, 28.0 kg/cm
2 , 398 psi), or below
about 134 kPa (1.34 bar, 1.4 kg/cm
2 , 20 psi).
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system in creases to an unusual level [more than 3.8 MPa (38 bar,
38.76 kg/cm
2 , 551 psi)], the release port on the pressure relief valve automatically opens and releases refrig-
erant into the atmosphere.
RJIA0849E
Revision: May 2010 2011 Versa

MTC-16
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REFRIGERATION SYSTEM
Component Part Location
INFOID:0000000005930837
SJIA0698E
Revision: May 2010 2011 Versa

OIL
MTC-17
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OIL
Maintenance of Oil Qu antity in CompressorINFOID:0000000005930838
The oil in the compressor circulates through the system with the refrigerant. Add oil to compressor when
replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified
amount.
If oil quantity is not maintained properly , the following malfunctions may result:
• Lack of oil: May lead to a seized compressor.
• Excessive oil: Inadequate cooling (thermal exchange interference)
OIL
OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR
After replacing any of the following major components, add the correct amount of oil to the system.
Amount Of Oil To Be Added
*1: If refrigerant leak is small, no addition of oil is needed.
OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT
TYPE 1 Compressor (CR-10) : NISSAN A/C System Oil Type R
TYPE 2 Compressor (CSV511) : NISSAN A/C System Oil Type S
Part replaced Oil to be added to system
Remarks
Amount of oil
m (US fl oz, Imp fl oz)
Evaporator 35 (1.2, 1.2)-
Condenser 15 (0.5, 0.5)-
Liquid tank 5 (0.2, 0.2)-
In case of refrigerant leak 30 (1.0, 1.1)
Large leak
None *1 Small leak
*1
Revision: May 2010 2011 Versa

MTC-18
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OIL
1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
2. Discharge refrigerant into the refrigerant recove ry/recycling equipment. Measure oil discharged into the
recovery/recycling equipment.
3. Drain the oil from the old (removed) compressor into a graduated container and recover the amount of oil drained.
4. Drain the oil from the new compressor into a separate, clean container.
5. Measure an amount of new oil installed equal to amount drained from old compressor. Add this oil to new compressor through the suction port opening.
6. Measure an amount of new oil equal to the amount recovered during discharging. Add this oil to new com- pressor through the suction port opening.
7. If the liquid tank also needs to be replaced, add another 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil at this
time.
Add this 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil only when replacing the compressor.
1. New compressor 2. Old compressor3. Recovery/recycling equipment
4. Measuring cup X 5. Measuring cup Y6. New oil
A. Drain oil from the new compressor into clean container B. Record amount of oil recovered C.
Add an additional 5 m (0.2 US fl oz,
0.2 Imp fl oz) of new oil when replacing
liquid tank
D. Install new oil equal to recorded amounts in measuring cups X plus Y
WJIA1716E
Revision: May 2010 2011 Versa

AIR CONDITIONER CONTROLMTC-19
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AIR CONDITIONER CONTROL
Control OperationINFOID:0000000005930839
BLOWER CONTROL DIAL
This dial turns the fan ON and OFF, and controls fan speed.
TEMPERATURE CONTROL DIAL
This dial allows you to adjust the temperature of the discharge air.
MODE DOOR CONTROL DIAL
This dial controls the outlet air flow.
INTAKE DOOR LEVER
• Recirculation (REC) position: Interior air is recirculated inside the vehicle.
• Fresh (FRE) position: Outside air is drawn into the passenger compartment.
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
A/C SWITCH (IF EQUIPPED)
The A/C switch controls the air conditioner system. When the switch is depressed with the fan ON, the com-
pressor will turn ON. The indicator lamp also illuminates.
1. Intake door lever 2. Mode door control dial 3. Rear window defogger switch
4. Blower control dial 5. A/C switch (if equipped)6. Temperature control dial
WJIA2189E
Revision: May 2010 2011 Versa

MTC-20
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AIR CONDITIONER CONTROL
Discharge Air Flow
INFOID:0000000005930840
System DescriptionINFOID:0000000005930841
SWITCHES AND THEIR CONTROL FUNCTION
Mode door position Air 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
WJIA2249E
Revision: May 2010 2011 Versa

AIR CONDITIONER CONTROLMTC-21
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WJIA2234E
Revision: May 2010 2011 Versa

MTC-22
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TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
CONSULT-III Function (BCM)INFOID:0000000005930842
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
ITEMS OF EACH PART
NOTE:
CONSULT-III will only display systems the vehicle possesses.
BCM diagnostic
test item Diagnostic mode
Content
Inspection by part WORK SUPPORT
Supports 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 results 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.
System and item CONSULT-III dis-
play Diagnostic test mode (Inspection by part)
WORK
SUPPORT SELF
−
DIAG RE-
SULTS CAN DIAG
SUPPORT
MNTR DATA
MONITOR ECU
PA R T
NUMBER AC-
TIVE
TEST CON-
FIGU-
RATION
BCM BCM×× × × ×
Power door lock sys-
tem DOOR LOCK
×× ×
Rear defogger REAR DEFOG-
GER ××
Warning chime BUZZER ××
Room lamp timer INT LAMP ×× ×
Remote keyless entry
system MULTI REMOTE
ENT
××
×
Headlamp HEAD LAMP×× ×
Wiper WIPER×× ×
Turn signal lamp
Hazard lamp FLASHER
××
Blower fan switch sig-
nal
Air conditioner switch
signal AIR CONDITION-
ER
×
Intelligent Key INTELLIGENT
KEY ×
Combination switch COMB SW ×
NVIS (NATS) IMMU ××
Interior lamp battery
saver BATTERY SAV-
ER
××
×
Back door/Trunk TRUNK ××
Theft alarm THEFT ALARM×× ×
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISMTC-23
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WORK SUPPORT
Display Item List
How to Perform Trouble Diagnosis for Quick and Accurate RepairINFOID:0000000005930843
WORK FLOW
SYMPTOM TABLE
Component Parts and Har ness Connector LocationINFOID:0000000005930844
ENGINE COMPARTMENT
Retained accessory
power controlRETAINED PWR
×× ×
Oil pressure switch SIGNAL BUFFER ××
Low tire pressure moni-
tor AIR PRESSURE
MONITOR
××
× ×
Panic alarm PANIC ALARM ×
System and item
CONSULT-III dis-
play Diagnostic test mode (Inspection by part)
WORK
SUPPORT SELF
−
DIAG RE-
SULTS CAN DIAG
SUPPORT
MNTR DATA
MONITOR ECU
PA R T
NUMBER AC-
TIVE
TEST CON-
FIGU-
RATION
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
*1 MTC-31, "Operational Check"
SHA900E
Symptom Reference Page
Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door. MTC-32
Discharge air temperature does not
change.Go to Trouble Diagnosis Procedure for Air Mix Door.
MTC-33
Intake door does not change.Go to Trouble Diagnosis Procedure for Intake Door. MTC-34
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor. MTC-34
Magnet clutch does not engage in A/C, de-
frost/foot, or defrost mode.Go to Trouble Diagnosis Procedure for Magnet Clutch.
MTC-38
Insufficient coolingGo to Trouble Diagnosis Procedure for Insufficient Cooling. MTC-46
Insufficient heatingGo to Trouble Diagnosis Procedure for Insufficient Heating. MTC-53
NoiseGo to Trouble Diagnosis Procedure for Noise. MTC-54
Revision: May 2010 2011 Versa

MTC-24
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TROUBLE DIAGNOSIS
PASSENGER COMPARTMENT
1. Refrigerant pressure sensor E17 (if equipped) 2. A/C compressor F3 (if equipped)
WJIA2235E
Revision: May 2010
2011 Versa