2008 NISSAN TEANA maintenance

REFRIGERATION SYSTEM
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Ambient Air Temperature-to-operating Pressure Table
Refrigerant LeakagesINFOID:0000000003795979
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electrical leak detector or fluorescent dye leak
detector (SST: J-42220).
Confirm the leakage with an electrical leak detector if dye is observed. It is possible a prior leakage was
repaired and not properly cleaned.
Do not stop when one leakage is found but continue checking for additional leakages at all system compo-
nents and connections when searching for leakages.
Move the probe along the suspected leakage area at 1 to 2 inches per second and no further than 1/4 inch
from the component when searching for refrigerant leakages using an electrical leak detector.
CAUTION:
Moving the electrical leak detector probe slower and closer to the suspected leakage area improves
the chances of finding a leakage.
60 - 7025 (77) 10.9 - 13.4 (52 - 56)
30 (86) 15.3 - 18.3 (60 - 65)
35 (95) 19.2 - 22.7 (67 - 73)
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2, psi)Low-pressure (Suction side)
kPa (bar, kg/cm2, psi) Relative humidity
%Air temperature
°C (°F)
50 -7025 (77)1,065 - 1,295
(10.62 - 12.95, 10.9 - 13.2, 154.4 - 187.8)215 - 261
(2.15 - 2.61, 2.1 - 2.6, 31.2 - 37.9)
30 (86)920 - 1,120
(9.20 - 11.20, 9.4 - 11.4, 133.4 - 162.4)230 - 287
(2.30 - 2.87, 2.3 - 2.9, 33.4 - 41.6)
35 (95)1,150 - 1,406
(11.50 - 14.06, 11.7 - 14.3, 167.0 - 203.9)287 - 355
(2.87 - 3.55, 2.9 - 3.6, 41.6 - 51.5)
40 (104)1,363 - 1,659
(13.63 - 16.59, 13.9 - 16.9, 197.7 - 240.6)320 - 392
(3.20 - 3.92, 3.3 - 3.9, 46.4 - 56.9) Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)

HA-32
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FLUORESCENT LEAK DETECTOR
FLUORESCENT LEAK DETECTOR
InspectionINFOID:0000000003795981
CHECKING SYSTEM FOR LEAKAGES USING THE FLUORESCENT LEAK DETECTOR
1. Check A/C system for leakages using the UV lamp and safety goggles (SST: J-42220) in a low sunlight
area (area without windows preferable). Illuminate all components, fittings and lines. The dye appears as
a bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain open-
ing indicates an evaporator core assembly (tubes, core or expansion valve) leakage.
2. Use an adjustable mirror or wipe the area with a clean shop rag or cloth, with the UV lamp for dye residue
if the suspected area is difficult to see.
3. Remove any residual dye using dye cleaner (SST: J-43872) to prevent future misdiagnosis after the leak-
age is repaired.
4. Perform a system performance check and verify the leakage repair with an approved electrical leak detec-
tor.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This may also cause false readings
and may damage the detector.
DYE INJECTION
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.45 bar, 3.52 kg/cm
2, 50
psi).
2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (SST: J-41459).
3. Connect the injector tool to the A/C low-pressure side service valve.
4. Start the engine. Then switch A/C ON.
5. Inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye through the low-pressure service valve using dye
injector tool (SST: J-41459) (refer to the manufacture’s operating instructions) when the A/C operating
(compressor running).
6. Disconnect the injector tool from the service valve with the engine still running.
CAUTION:
Be careful when replacing the A/C system or a component, pour the dye directly into the open sys-
tem connection and proceed with the service procedures.
7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the
leakage size, operating conditions and location of the leakage, it may take from minutes to days for the
dye to penetrate a leakage and become visible.
8. Attach a blue label if necessary.

ELECTRICAL LEAK DETECTOR
HA-33
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ELECTRICAL LEAK DETECTOR
InspectionINFOID:0000000003795982
PRECAUTIONS FOR HANDLING LEAK DETECTOR
Use an electrical leak detector (SST) or equivalent when performing
a refrigerant leakage check. Ensure that the instrument is calibrated
and set properly per the operating instructions.
The leak detector is a delicate device. Read the operating instruc-
tions and perform any specified maintenance for using the leak
detector properly.
1. Position probe approximately 3 mm (0.12 in) away from point to
be checked.
2. Circle each fitting completely with probe when testing.
3. Move probe along component approximately 25 to 50 mm (1 to
2 in)/sec.
CHECKING PROCEDURE
Check that there is no refrigerant vapor, shop chemicals, or cigarette smoke in the vicinity of the vehicle to pre-
vent inaccurate or false readings. Perform the leakage test in calm area (low air/wind movement) so that the
leaking refrigerant is not dispersed.
1. Stop the engine.
SHA705EB
JSIIA1099GB
SHA706E
SHA708EA

HA-34
< ON-VEHICLE MAINTENANCE >
ELECTRICAL LEAK DETECTOR
2. Connect a suitable A/C manifold gauge set (SST) to the A/C service valves.
3. Check if the A/C refrigerant pressure is at least 345 kPa (3.45 bar, 3.52 kg/cm
2, 50 psi) above 16°C
(61°F). Recover/evacuate and recharge the system with the specified amount of refrigerant if less than
specification.
NOTE:
Leakages may not be detected since the system may not reach 345 kPa (3.45 bar, 3.52 kg/cm
2, 50 psi) at
temperatures below 16°C (61°F).
4. Perform the leakage test from the high-pressure side (compressor discharge “a” to evaporator inlet “j”) to
the low-pressure side (evaporator drain hose “k” to shaft seal “p”). Perform a leakage check for the follow-
ing areas carefully. Clean the component to be checked and move the leakage detected probe completely
around the connection/component.
Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
Condenser
Check the fitting of condenser pipe assembly, high-pressure flexible hose and pipe.
Liquid tank
Check the fitting of condenser and refrigerant pressure sensor.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leakages).
NOTE:
Wipe any residue from valves to prevent any false readings by leak detector after removing manifold
gauge set (SST) from service valves.
Cooling unit (Evaporator)
Turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the cooling unit with
engine OFF. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. Verify at least once by blowing compressed air into area of suspected leakage, then repeat check as out-
lined above if a leak detector detects a leakage.
6. Do not stop when one leakage is found. Continue checking for additional leakages at all system compo-
nents.
JPIIA0988GB

ELECTRICAL LEAK DETECTOR
HA-35
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If no leakages are found, perform steps 7 - 10.
7. Start the engine.
8. Set the A/C control as per the following;
a. A/C switch: ON
b. Air flow: VENT (Ventilation)
c. Intake door position: Recirculation
d. Temperature setting: Max. cold
e. Fan speed: High
9. Run engine at 1,500 rpm for at least 2 minutes.
10. Stop the engine and perform leakage check again following
steps 4 through 6 above.
Refrigerant leakages should be checked immediately after stop-
ping the engine. Begin with the leak detector at the compressor.
The pressure on the high-pressure side drops gradually after
refrigerant circulation stops and pressure on the low-pressure
side rises gradually, as shown in the graph. Some leakages are
more easily detected when pressure is high.
11. Check recovery/recycling recharging equipment gauges before connecting recovery/recycling recharging
equipment to vehicle. No refrigerant pressure should be displayed. Recover refrigerant from equipment
lines if pressure is displayed.
12. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-
ponent if necessary.
13. Evacuate and recharge A/C system and perform the leakage test to confirm no refrigerant leakages.
14. Perform A/C performance test to ensure system works normally. Refer to HA-30, "
Performance Chart".
SHA839E

PRECAUTIONS
HAC-97
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003854497
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. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
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 AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003854498
NOTE:
 Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.

PRECAUTIONS
HAC-101
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WARNING:
Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.
CAUTION:
Observe the following when replacing or cleaning refrigerant cycle components.
 Store it in the same way at it is when mounted on the car when the compressor is removed. Failure
to do so will cause lubricant to enter the low-pressure chamber.
 Always use a torque wrench and a back-up wrench when connecting tubes.
 Immediately plug all openings to prevent entry of dust and moisture after disconnecting tubes.
 Connect the pipes at the final stage of the operation when installing an air conditioner in the vehicle.
Never remove the seal caps of pipes and other components until just before required for connection.
 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.
 Replace always used O-rings.
 Apply lubricant to circle of the O-rings shown in illustration when connecting tube. Be careful not to
apply lubricant to threaded portion.
 O-ring must be closely attached to the groove portion of tube.
 Be careful not to damage O-ring and tube when replacing the O-ring.
 Connect tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is
installed to tube correctly.
 Perform leakage test and make sure that there is no leakage from connections after connecting line.
Disconnect the line and replace the O-ring when the refrigerant leaking point is found. Then tighten
the connections of seal seat to the specified torque.
Service EquipmentINFOID:0000000003846402
RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufacturer instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
ELECTRICAL LEAK DETECTOR
Be certain to follow the manufacturer instructions for tester operation and tester maintenance.
VACUUM PUMP
Name : NISSAN A/C System Oil Type S
RHA861F

HAC-104
< PRECAUTION >[WITHOUT 7 INCH DISPLAY]
COMPRESSOR
COMPRESSOR
General PrecautionsINFOID:0000000003846403
CAUTION:
 Plug all openings to prevent moisture and foreign matter from entering.
 Store it in the same way at it is when mounted on the car when the compressor is removed.
 Follow “Maintenance of Lubricant Quantity in Compressor” exactly when replacing or repairing the
compressor. Refer to HA-28, "
Maintenance of Lubricant Quantity".
 Keep friction surfaces between clutch and pulley clean. Wipe it off by using a clean waste cloth
moistened with thinner if the surface is contaminated with lubricant.
 Turn the compressor shaft by hand more than five turns in both directions after compressor service
operation. This equally distributes lubricant inside the compressor. Let the engine idle and operate
the compressor for one hour after the compressor is installed.
 Apply voltage to the new compressor and check for normal operation after replacing the compressor
magnet clutch.