2008 NISSAN LATIO maintenance

MA-28
< SERVICE INFORMATION >
CHASSIS AND BODY MAINTENANCE
• When replacing any seat belt assembly always use a Genuine NISSAN seat belt assembly.

MT-2
< SERVICE INFORMATION >
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001703128
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000001844076
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PrecautionINFOID:0000000001703129
• If transaxle assembly is removed from the vehicle, always replace CSC (Concentric Slave Cylinder).
Installed CSC returns to the original position when removing transaxle assembly. Dust on clutch disc sliding
parts may damage CSC seal, and may cause clutch fluid leakage.
• Do not reuse transaxle oil.
• Drain, fill and check transaxle oil with the vehicle on level surface.
• During removal or installation, keep inside of transaxle clear of dust or dirt.
• Check for the correct installation orientation prior to removal or disassembly. If matching marks are required,
be certain they do not interfere with the function of the parts they are applied to.
• In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to outside. If tight-
ening sequence is specified, follow it.
• Be careful not to damage the sliding surfaces and mating surfaces of parts.
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AIR CONDITIONER
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SECTION MTC
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CONTENTS
MANUAL AIR CONDITIONER
SERVICE INFORMATION ............................3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for Procedure without Cowl Top Cover ......3
Precaution for Working with HFC-134a (R-134a) ......3
General Refrigerant Precaution ................................4
Oil Precaution ............................................................4
Precaution for Refrigerant Connection ......................4
Precaution for Service of Compressor ......................7
Precaution for Service Equipment .............................7
Precaution for Leak Detection Dye ...........................9
PREPARATION ..................................................10
Special Service Tool ...............................................10
HFC-134a (R-134a) Service Tool and Equipment ....10
Commercial Service Tool ........................................13
REFRIGERATION SYSTEM ..............................14
Refrigerant Cycle ....................................................14
Refrigerant System Protection ................................14
Component Part Location .......................................15
OIL ......................................................................16
Maintenance of Oil Quantity in Compressor ...........16
AIR CONDITIONER CONTROL .........................19
Control Operation ....................................................19
Discharge Air Flow ..................................................20
System Description .................................................20
CAN Communication System Description ...............21
TROUBLE DIAGNOSIS .....................................22
CONSULT-III Function (BCM) .................................22
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ......................................................
22
Component Parts and Harness Connector Loca-
tion ..........................................................................
23
Schematic ...............................................................25
Wiring Diagram - Heater - .......................................26
Wiring Diagram - A/C,M - ........................................27
Operational Check ...................................................30
Mode Door ...............................................................31
Air Mix Door .............................................................32
Intake Door ..............................................................33
Front Blower Motor Circuit .......................................33
Magnet Clutch Circuit (If Equipped) .........................37
Insufficient Cooling ..................................................45
Insufficient Heating ..................................................52
Noise .......................................................................53
CONTROLLER ..................................................55
Removal and Installation .........................................55
Disassembly and Assembly .....................................56
THERMO CONTROL AMPLIFIER ....................57
Removal and Installation .........................................57
A/C UNIT ASSEMBLY ......................................58
Removal and Installation .........................................58
Disassembly and Assembly .....................................60
BLOWER MOTOR ............................................62
Removal and Installation .........................................62
INTAKE DOOR ..................................................63
Intake Door Cable Adjustment .................................63
AIR MIX DOOR .................................................64
Air Mix Door Cable Adjustment ...............................64
MODE DOOR ....................................................65
Mode Door Cable Adjustment .................................65
BLOWER FAN RESISTOR ...............................66
Removal and Installation .........................................66
HEATER CORE .................................................67
Removal and Installation .........................................67
AIR CONDITIONER FILTER .............................68
Removal and Installation .........................................68

PRECAUTIONS
MTC-3
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SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001704274
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000001704275
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precaution for Working with HFC-134a (R-134a)INFOID:0000000001704276
WARNING:
• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants
must never be mixed, even in the smallest amounts. If the refrigerants are mixed a compressor mal-
function is likely to occur.
• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If
oil other than that specified is used, compressor malfunction is likely to occur.
• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
- When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possible
to minimize the entry of moisture into system.
- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If acci-
dental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
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PRECAUTIONS
MTC-7
< SERVICE INFORMATION >
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• Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
• Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
• Always replace used O-rings.
• When connecting tube, apply the specified A/C oil to circle of the O-rings as shown. Be careful not to
apply oil to threaded portion. Refer to MTC-88, "
Oil".
• O-ring must be closely attached to dented portion of tube.
• When replacing the O-ring, be careful not to damage O-ring and tube.
• Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to tube correctly.
• After connecting line, perform leak test and make sure that there is no leakage from connections.
When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten
connections of seal seat to the specified torque.
Precaution for Service of CompressorINFOID:0000000001704280
•Plug all openings to prevent moisture and foreign matter from entering.
•When the compressor is removed, store it in the same position as it is when mounted on the car.
•When replacing or repairing compressor, follow “Maintenance of Oil Quantity in Compressor”
exactly. Refer to MTC-16, "
Maintenance of Oil Quantity in Compressor" .
•Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with oil, wipe
it off by using a clean waste cloth moistened with thinner.
•After compressor service operation, turn the compressor shaft by hand more than five turns in both
directions. This will equally distribute oil inside the compressor. After the compressor is installed,
let the engine idle and operate the compressor for one hour.
•After replacing the compressor magnet clutch, apply voltage to the new one and check for usual
operation.
Precaution for Service EquipmentINFOID:0000000001704281
RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
VACUUM PUMP
RHA861F

MTC-16
< SERVICE INFORMATION >
OIL
OIL
Maintenance of Oil Quantity in CompressorINFOID:0000000001704289
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 RETURN OPERATION
Adjust the oil quantity according to the test group shown below.
1.CHECK OIL RETURN OPERATION
Can oil return operation be performed?
• A/C system works properly.
• There is no evidence of a large amount of oil leakage.
CAUTION:
If excessive oil leakage is noted, do not perform the oil return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.PERFORM OIL RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start engine, and set the following conditions:
- Engine speed: Idling to 1,200 rpm
- A/C blower switch: ON
- Blower speed: Max. position
- Temp. control: Optional [Set so that intake air temperature is 25° to 30°C (77° to 86° F)].
- Intake position: Recirculation (REC)
2. Perform oil return operation for about 10 minutes.
3. Stop engine.
>> GO TO 3.
3.CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO "OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT".
NO >> GO TO "OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COM-
PRESSOR".
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
TYPE 1 Compressor (CR-10) : NISSAN A/C System Oil Type R
TYPE 2 Compressor (CSV511) : NISSAN A/C System Oil Type S
Part replacedOil 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) -

MTC-54
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*1.MTC-30, "Operational Check"*2.MTC-78, "Removal and Installation of
Compressor"
*3.MTC-16, "Maintenance of Oil Quanti-
ty in Compressor"
*4.EM-13, "Checking Drive Belts"*5.MTC-78, "Removal and Installation of
Compressor"
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MTC-68
< SERVICE INFORMATION >
AIR CONDITIONER FILTER
AIR CONDITIONER FILTER
Removal and InstallationINFOID:0000000001704320
FUNCTION
The fresh air (A) and the recirculated air (B) drawn inside the pas-
senger compartment by the blower fan (1) is kept clean (C) on either
mode by the air conditioner filter (2), located before the evaporator
(3), in the A/C unit assembly.
REPLACEMENT TIMING
Replace the air conditioner filter according to the maintenance schedules. Refer to MA-6.
NOTE:
The air conditioner filter caution label is located inside the glove box door.
REPLACEMENT PROCEDURES
1. Remove the glove box assembly. Refer to IP-10.
2. Compress the air conditioner filter (1) downward while sliding it
to the RH side of the vehicle to release the upper pawl.
3. Move the bottom of air conditioner filter (1) upward as shown to
release the bottom tab, then remove it.
4. Replace the air conditioner filter with new one and install the new filter in the A/C unit assembly.
CAUTION:
Make sure that the air conditioner filter lower tab is fully seated, and that the air conditioner upper
pawl is locked into place securing the new filter into the A/C unit assembly.
5. Install the glove box assembly. Refer to IP-10
.
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