HAC-30
< BASIC INSPECTION >[MANUAL AIR CONDITIONING]
OPERATION INSPECTION
OPERATION INSPECTION
Work ProcedureINFOID:0000000012430728
The purpose of the operation inspection is to c
heck that the individual system operates normally.
1.CHECK FRONT BLOWER MOTOR
1. Operate fan control dial.
2. Check that fan speed changes. C heck operation for all fan speeds.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 8.
2.CHECK DISCHARGE AIR
1. Operate fan control dial to set the fan speed to maximum speed.
2. Operate MODE dial to each position.
3. Check that air outlets change according to each indicated air outlet by placing a hand in front of the air outlets. Refer to VTL-4, "
System Description".
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 8.
3.CHECK INTAKE AIR
1. Operate intake lever to each position.
2. Listen to intake sound and confirm air inlets change.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 8.
4.CHECK COMPRESSOR
1. Turn fan control dial ON.
2. Press A/C switch. The A/C switch indicator is turns ON.
3. Check visually and by sound that the compressor operates.
4. Press A/C switch again. The A/C switch indicator is turns OFF.
5. Check that compressor stops.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 8.
5.CHECK DISCHARGE AIR TEMPERATURE
1. Operate temperature control dial.
2. Check that discharge air temperature changes.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 8.
6.CHECK TEMPERATURE DECREASE
1. Operate compressor.
2. Turn temperature control dial to full cold position.
3. Check that cool air blows from the air outlets.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 8.
7.CHECK TEMPERATURE INCREASE Check condition : Engine running
at normal operating temperature.
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INSUFFICIENT HEATINGHAC-49
< SYMPTOM DIAGNOSIS > [MANUAL AIR CONDITIONING]
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INSUFFICIENT HEATING
DescriptionINFOID:0000000012430752
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis ProcedureINFOID:0000000012430753
NOTE:
Perform self-diagnosis with CONSULT before performing sy mptom diagnosis. If any malfunction result or DTC
is detected, perform the corresponding diagnosis.
1.CHECK COOLING SYSTEM
1. Check engine coolant level and check for leakage. Refer to CO-8, "
Inspection".
2. Check radiator cap. Refer to CO-12, "
RADIATOR CAP : Inspection".
3. Check water flow sounds of the engine coolant. Refer to CO-9, "
Refilling".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refill engine coolant and repair or replace the parts depending on the inspection results.
2.CHECK HEATER HOSE
Check installation of heater hose by visually or touching.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace parts depending on the inspection results.
3.CHECK HEATER CORE
1. Check temperature of inlet hose and outlet hose of heater core.
2. Check that inlet side of heater core is hot and the outle t side is slightly lower than/almost equal to the inlet
side.
CAUTION:
Always perform the temperature inspection in a sh ort period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace heater core. Refer to HA-35, "
HEATER CORE : Removal and Installation".
4.CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of air conditioning system for air leakage.
Is the inspection result normal?
YES >> Check air mix door cable inst allation and air mix door operation.
NO >> Repair or replace parts depending on the inspection results.
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PRECAUTIONSHA-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000012431985
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 severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the
battery and wait at least three mi nutes before performing any service.
Precaution for WorkINFOID:0000000012918336
• When removing or disassembling each component, be ca reful not to damage or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a shop cloth or vinyl tape to protect it.
• Protect the removed parts with a shop cloth and prevent them from being dropped.
• Replace a deformed or damaged clip.
• If a part is specified as a non-reusabl e part, always replace it with a new one.
• Be sure to tighten bolts and nuts securely to the specified torque.
• After installation is complete, be sure to check that each part works properly.
• Follow the steps below to clean components:
- Water soluble dirt:
• Dip a soft cloth into lukewarm water, wring the water out of the cloth and wipe the dirty area.
• Then rub with a soft, dry cloth.
-Oily dirt:
• Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%) and wipe the dirty
area.
• Then dip a cloth into fresh water, wring the water out of the cloth and wipe the detergent off.
• Then rub with a soft, dry cloth.
- Do not use organic solvent such as thinner, benzene, alcohol or gasoline.
- For genuine leather seats, use a genuine leather seat cleaner.
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HA-6
< PRECAUTION >
PRECAUTIONS
• The air conditioner warranty is void if the vehicle is within the warranty period. Please contact Nissan Cus-tomer Affairs for further assistance.
COMPRESSOR
CAUTION:
• Cap or plug all openings to prevent moisture and fo reign matter from entering.
• Store it in the same way as it is when moun ted on the car when the compressor is removed.
• Follow “Maintenance of Oil Level” exactly when replacing or repairing compressor. Refer to HA-22,
"Description".
• Keep friction surfaces between clut ch and pulley clean. Wipe it off by using a clean waste cloth
moistened with thinner if the su rface is contaminated with oil.
• Turn the compressor shaft by hand more than five turns in both directions after compressor service
operation. This distributes oil e qually inside the compressor. Let the engine idle and operate the
compressor for one hour after the compressor is installed.
• Apply voltage to the new one and check for norma l operation after replacing the compressor magnet
clutch.
LEAK DETECTION DYE
CAUTION:
• The A/C system contains a fluorescent leak detect ion dye used for locating refrigerant leaks. An
ultraviolet (UV) lamp is required to il luminate the dye when inspecting for leaks.
• Always wear fluorescence enhancing UV safety goggles to protect eyes and enhance the visibility of the fluorescent dye.
• The fluorescent dye leak detector is not a replacement for an electrical l eak detector (SST: J-41995).
The fluorescent dye leak detector sh ould be used in conjunction with an electrical leak detector
(SST: J-41995) to pin-point refrigerant leaks.
• Read and follow all manufacture’s operating inst ructions and precautions prior to performing the
work for the purpose of safet y and customer’s satisfaction.
• A compressor shaft seal should not necessarily be repaired becau se of dye seepage. The compres-
sor shaft seal should only be repaired after confi rming the leak with an electrical leak detector (SST:
J-41995).
• Always remove any remaining dye from the leak area after repairs are completed to avoid a misdiag-
nosis during a future service.
• Do not allow dye to come into contact with painted body panels or interior components. Clean imme- diately with the approved dye cl eaner if dye is spilled. Fluorescent dye left on a surface for an
extended period of time cannot be removed.
• Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
• Do not use more than one refrigerant dye bottle [1/4 ounce (7.4 cc)] per A/C system.
• Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use
HFC-134a (R-134a) leak detection dye in CFC-12 (R- 12) A/C system or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C system or A/C system damage may result.
• The fluorescent properties of the dye remains fo r three or more years unless a compressor malfunc-
tion occurs.
NOTE: Identification
• Vehicles with factory installed fluorescent dye have a green label.
• Vehicles without factory installed fluorescent dye have a blue label.
Service EquipmentINFOID:0000000012431988
RECOVERY/RECYCLING RECHARGING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Do not
introduce any refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Be certain to follow the manufacturer’s instruct ions for tester operation and tester maintenance.
VACUUM PUMP
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REFRIGERANTHA-19
< PERIODIC MAINTENANCE >
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4. Press UV lamp switch (5) and check A/C system for re frigerant leaks. (Where refrigerant leaks occur, flu-
orescent leak detection dye appears green in color.)
WARNING:
Do not look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, fo llow the manufacturer’s operating instructions.
• Illuminate pipe joints from different angles using UV lamp to check for leaks.
• Use a mirror in areas that are di fficult to see to check for leaks.
• Refrigerant leaks from the evaporator can be detected by soaking a cotton swab or similar material with
drain hose water and illuminating it using the UV lamp.
• Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may fluoresce. Be careful not to misidentify leaks.
5. Repair or replace parts where refrigerant lea ks occur and wipe off fluorescent leak detection dye.
NOTE:
Completely wipe off fluorescent leak detection dye from gaps between parts, screw threads, and other
components using a cotton swab or similar material.
6. Use a UV lamp to check that no fluorescent leak detection dye remains after finishing work. WARNING:
Do not look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, fo llow the manufacturer’s operating instructions.
• Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may
fluoresce. Be careful not to misidentify leaks.
CHECK REFRIGERANT LEAKS USING ELECTRONIC LEAK DETECTOR
WARNING:
Do not check for refrigerant leaks while the engine is running.
CAUTION:
Be careful of the following items so that in accurate checks or misidentifications are avoided.
• Do not allow refrigerant vapor, shop chemical vapors, cigarette smoke or other contaminates around the vehicle.
• Always check refrigerant leaks in a low air flow en vironment so that refrigerant may not disperse.
1. Stop the engine.
2. Connect recovery/recycling/recharging equipment or manifold gauge set to the A/C service valves.
3. Check that A/C refrigerant pressure is 345 kPa (3.52 kg/cm
2, 50 psi) or more when temperature is 16 °C
(61 °F) or more. When pressure is lower than the specified value, recycle refrigerant completely and
recharge refrigerant to the specified level.
NOTE:
Leaks may not be detected if A/C refriger ant pressure is 345 kPa (3.52 kg/cm
2, 50 psi) or less when tem-
perature is less than 16° C (61°F).
4. Clean the area where the refrigerant leak check is performed and check for refrigerant leaks along all sur- faces of pipe connections and A/C system co mponents using electronic leak detector probe.
CAUTION:
• Continue checking once leaks are found. Always co ntinue and complete checking along all pipe
connections and A/C system comp onents for additional leaks.
• When leaks are detected, clean leak ar ea using compressed air and re-check.
• When checking the evaporator for leaks, always clean inside of drain hose so that the probe sur-
face may not be exposed to water or dirt.
NOTE:
• Always check for leaks starting from the high-pressure side and continue to the low-pressure side.
• When checking the evaporator for leaks, operate blower motor for 15 minut\
es or more at the maximum speed while the engine is stopped. Insert electronic leak detector probe into drain hose and hold for 10
minutes or more.
• When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining
refrigerant so that misidentification can be avoided.
5. Repair or replace parts where refrigerant leaks occur.
6. Start the engine and set A/C control in the following conditions. • A/C switch: ON
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HA-20
< PERIODIC MAINTENANCE >
REFRIGERANT
• Air flow: VENT (ventilation)
• Intake door position: Recirculation
• Temperature setting: Full cold
• Blower speed: Maximum
7. Run the engine at approximately 1,500 rpm for two minutes or more.
8. Stop the engine. Check for refrigerant leaks. Go to step 4. WARNING:
Be careful not to get burned when the engine is hot.
NOTE:
• Start refrigerant leak check immediately after the engine is stopped.
• When refrigerant circulation is stopped, pressure on the low- pressure side rises gradually and pressure on the high-pres-
sure side falls gradually.
• The higher the pressure is, the easier it is to find refrigerant leaks.
Recycle RefrigerantINFOID:0000000012431999
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC- 12 is accidentally charged, compressor damage
may result due to in sufficient lubrication.
• Always observe and follow precaution s described on refrigerant container. Incorrect handling may
result in an explosion of refrigerant container, frostbite or the loss of eyesight.
• Do not breathe A/C refrigerant and oil vapor or mi st. Exposure may irritate eyes, nose, or throat.
• Do not allow HFC-134a to be exposed to an open flame. Poisonous gas is produced if refrigerant
burns. Keep workshop well ventilated.
1. Perform oil return operation. Refer to HA-22, "
Perform Oil Return Operation". (If refrigerant or oil leaks are
detected in a large amount, omit this step, and go to step 2.)
CAUTION:
Do not perform oil return operation if a la rge amount of refrigerant or oil has leaked.
2. Check pressure gauge readings of recovery/recyc ling/recharging equipment. When remaining pressure
exists, recycle refrigerant from high-pressure hose and low-pressure hose.
NOTE:
Follow manufacturer instructions for the handling or maintenance of the equipment. Do not fill the equip-
ment with non-specified refrigerant.
3. Remove A/C service valve caps from the vehicle.
4. Connect recovery/recycling/recharging equipment to A/C service valves.
5. Operate recovery/recycling/recharging equipm ent, and recycle refrigerant from the vehicle.
6. Evacuate air for 10 minutes or more to remove any remaining refrigerant integrated in the compressor oil,
etc.
7. Refrigerant recycle operation is complete.
Charge RefrigerantINFOID:0000000012432000
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC- 12 is accidentally charged, compressor damage
may result due to in sufficient lubrication.
• Always observe and follow precaution s described on refrigerant container. Incorrect handling may
result in an explosion of refrigerant co ntainer, frostbite, or the loss of eyesight.
• Do not breathe A/C refrigerant and oil vapor or mi st. Exposure my irritate eyes, nose, or throat.
• Do not allow HFC-134a to be exposed to an open flame. Poisonous gas is produce if refrigerant burns. Keep workshop well ventilated.
1. Connect recovery/recycling/recharging equipment to the A/C service valves.
SHA839E
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HA-22
< PERIODIC MAINTENANCE >
OIL
OIL
DescriptionINFOID:0000000012432001
MAINTENANCE OF OIL LEVEL
The compressor oil circulates in the system together with the refrigerant. It is necessary to add oil to the com-
pressor when replacing A/C system components or when a large amount of refrigerant leaks from the system.
It is important to always maintain oil level within t he specified level. Otherwise, the following conditions may
occur.
• Insufficient oil amount: Stuck compressor
• Excessive oil amount: Insufficient cooling (caused by insufficient heat exchange)
InspectionINFOID:0000000012432002
If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.
1.COMPRESSOR OIL JUDGMENT
1. Remove the compressor. Refer to HA-26, "
Removal and Installation".
2. Sample the compressor oil and judge on the figure.
Judgement result 1>>Replace compressor only.
Judgement result 2>>Replace compressor and condenser (includes liquid tank).
Perform Oil Retu rn OperationINFOID:0000000012432003
CAUTION:
If a large amount of refrigerant or oil leaks from the system, do not perform oil return operation.
1. Start the engine and set the front air control to the following conditions. • Engine speed: Idling to 1,200 rpm
• A/C switch: ON
• Blower speed: Maximum
• Intake door position: Recirculation
• Temperature setting: Full cold
2. Perform oil return operation for approximately 10 minutes.
3. Stop the engine.
4. Oil return operation is complete.
Oil Adjusting Procedure for Compon ents Replacement Except Compressor
INFOID:0000000012432004
Add the amount of oil that is calculated according to the following conditions.
Example: Oil amount to be added when replacing evaporator [m (Imp fl oz.)] = 35 (1.2) + α
Name A/C System Oil Type: DH-PR
JSIIA0927GB
Conditions
Oil amount to be added to A/C system
m (Imp fl oz.)
Replace evaporator 35 (1.2)
Replace condenser (includes liquid tank) 20 (0.7)
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HA-24
< PERIODIC MAINTENANCE >
PERFORMANCE TEST
PERFORMANCE TEST
InspectionINFOID:0000000012432006
INSPECTION PROCEDURE
1. Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge set.
2. Start the engine, and set to the following condition.
Test condition
3. Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)
4. Check that test results of “recirculating-to-disc harge air temperature” and “ambient air temperature-to-
operating pressure” are within the specified value.
5. When test results are within the spec ified value, inspection is complete.
If any test result is out of the specified val ue, perform diagnosis by manifold gauge set. Refer to HA-15,
"Symptom Table".
RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE
FRONT
AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE
Surrounding condition In a well-ventilated place away from direct sunlight.
Vehicle condition Doors
Closed
Door glass Closed
Hood Open
Engine speed Idle speed
A/C condition (front/rear) Temperature control
Full cold
A/C switch ON
Air outlet VENT (ventilation)
Intake door position Recirculation
Blower speed Maximum
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature from center ventilator
°C ( °F)
Relative humidity
% Air temperature
°C ( °F)
50 – 60 20 (68)
4.7 - 6.7 (40 - 44)
25 (77) 8.6 - 11.1 (47 - 52)
30 (86) 12.6 - 15.6 (55 - 60)
35 (95) 19.0 - 22.5 (66 - 73)
60 – 70 20 (68)
6.7 - 8.7 (44 - 48)
25 (77) 11.1 - 13.6 (52 - 56)
30 (86) 15.6 - 18.6 (60 - 65)
35 (95) 22.5 - 26.0 (73 - 79)
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