Pressure NISSAN TEANA 2014 Service Manual

HA-14
< SYSTEM DESCRIPTION >
REFRIGERATION SYSTEM
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 increases to an abnormal level [more than 3,727 kPa (38 kg/
cm
2, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into
the atmosphere.
Component Part LocationINFOID:0000000009463920
1. Low-pressure pipe 2. High-pressure pipe 3. High-pressure flexible hose
4. Condenser assembly 5. Compressor 6. Low-pressure flexible hose
7. Heating and cooling unit assembly Front
ALIIA0619ZZ
Revision: November 20132014 Altima NAM

HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS
HA-17
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000009463922
SYMPTOM TABLE
Symptom Reference Page
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C System. HAC-159
(manual A/C)
HAC-99
(automatic A/C)
A/C system cannot be controlled. Go to Self-diagnosis Function. HAC-139
(manual A/C)
HAC-46
(automatic A/C)
Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door
Motor. HAC-142
(manual A/C)
HAC-73
(automatic A/C)
Mode door motor is malfunctioning.
Discharge air temperature does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door
Motor. HAC-144
(manual A/C)
HAC-69
(automatic A/C driver side)
HAC-71
(automatic A/C passen-
ger side)
Air mix door motor is malfunctioning.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door
Motor. HAC-146
(manual A/C)
HAC-75
(automatic A/C)
Intake door motor is malfunctioning.
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Mo-
tor. HAC-148
(manual A/C)
HAC-84
(automatic A/C)
Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet
Clutch. HAC-151
(manual A/C)
HAC-87
(automatic A/C)
Insufficient cooling. Go to Trouble Diagnosis Procedure for Insufficient
Cooling. HAC-155
(manual A/C)
HAC-96
(automatic A/C)
Insufficient heating. Go to Trouble Diagnosis Procedure for Insufficient
Heating. HAC-157
(manual A/C)
HAC-98
(automatic A/C)
Noise. Go to Trouble Diagnosis Procedure for Noise. HA-20
A/C switch LED does not illuminate. Go to Trouble Diagnosis Procedure for A/C System.HAC-152 (manual A/C)
HAC-83
(automatic A/C)
Mode button LED(s) does not illuminate. Go to Trouble Diagnosis Procedure for A/C System. HAC-152
(manual A/C)
HAC-83
(automatic A/C)
Both high- and low-pressure sides are too
high. Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
High-pressure side is too high and low-pres-
sure side is too low. Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
High-pressure side is too low and low-pres-
sure side is too high. Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
Both high- and low-pressure side some-
times becomes negative. Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
Low-pressure side sometimes becomes
negative. Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
Low-pressure side becomes negative.
Go to Trouble Diagnosis Procedure for Abnormal
Pressure. HA-18
Revision: November 20132014 Altima NAM

HA-18
< SYMPTOM DIAGNOSIS >
REFRIGERATION SYSTEM SYMPTOMS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual PressureINFOID:0000000009463923
Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to
above table (Ambient air temperature-to-operating pres sure table) since the standard (usual) pressure, how-
ever, differs from vehicle to vehicle.
Symptom TableINFOID:0000000009463924
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high and low pressure sides
are too high. The pressure returns to nor-
mal soon after sprinkling wa-
ter on condenser. Overfilled refrigerant. Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.
Air flow to condenser is insuf-
ficient. Insufficient condenser cooling
performance.
• Poor fan rotation of radiator and condenser.
• Improper installation of air
guide.
• Clogged or dirty condenser fins. • Repair or replace malfunc-
tioning parts.
• Clean and repair condenser
fins.
When compressor is stopped,
a high-pressure reading
quickly drops by approximate-
ly 196 kPa (2 kg/cm
2, 28 psi).
It then gradually decreases. Air mixed in refrigerant cycle.
Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.
• Low-pressure pipe is cooler than the outlet of evapora-
tor.
• Low-pressure pipe is frost- ed. Expansion valve opened too
much (excessive flow of refrig-
erant). Replace expansion valve.
High-pressure side is excessively
high and low-pressure side is too
low.
High-pressure pipe and upper
side of condenser become
hot, however, liquid tank does
not become so hot. Clogged or crushed high-pres-
sure pipe located between
compressor and condenser. Repair or replace the malfunc-
tioning parts.
High-pressure side is too low and
low-pressure side is too high. • The readings of both sides
become equal soon after
compressor operation
stops.
• There is no temperature dif- ference between high- and
low-pressure sides. Malfunction in compressor sys-
tem (insufficient compressor
pressure operation).
• Damage or breakage of
valve.
• Malfunctioning gaskets. Replace compressor.
AC359A
AC360A
AC356A
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REFRIGERATION SYSTEM SYMPTOMSHA-19
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Both high and low pressure sides
are too low. • The area around evapora-
tor outlet does not become
cold.
• The area around evapora- tor inlet becomes frosted. Clogged expansion valve.
• Breakage of temperature sensor.
• Clogging by foreign material. Eliminate foreign material from
expansion valve or replace it.
• There is a temperature dif- ference between the areas
around outlet and inlet
pipes of liquid tank.
• Liquid tank becomes frost- ed. Malfunction in inner liquid tank
(clogged strainer). Replace liquid tank.
Evaporator becomes frosted. Clogged or crushed low-pres-
sure pipe. Repair or replace malfunction-
ing parts.
Malfunction in intake air tem-
perature sensor. Check intake sensor system.
Refer to HAC-64, "Component
Inspection".
There is a small temperature
difference between the high
and low pressure pipes for re-
frigerant cycle. • Shortage of refrigerant.
• Leakage of refrigerant. • Check for leakage.
• Collect all refrigerant, evacu-
ate refrigerant cycle again,
and then refill it with the spec-
ified amount of refrigerant.
Low-pressure side sometimes be-
comes negative. • Sometimes the area
around evaporator outlet
does not become cold.
• Sometimes the area
around evaporator inlet is
frosted. • Icing caused by the mixing of
water in cooler cycle.
• Deteriorated dryer in liquid
tank. • Collect all refrigerant.
• Evacuate refrigerant cycle completely, and then refill it
with the specified amount of
refrigerant. At this time, al-
ways replace liquid tank.
Hunting in high-pressure side. There is no temperature dif-
ference between high- and
low-pressure sides. Malfunctioning variable valve
in compressor. • Replace compressor.
• Check ECV system.
Gauge indication Refrigerant cycle Probable cause Corrective action
AC353A
AC354A
Revision: November 20132014 Altima NAM

HA-22
< PERIODIC MAINTENANCE >
REFRIGERANT
4. Press UV lamp switch (5) and check A/C system for refrigerant leakage. (Where refrigerant leakage
occurs, fluorescent leak detec tion dye appears in green color.)
WARNING:
Do not look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, follow the manufacturer operating instructions.
• Illuminate piping joints from different angles using UV lamp and check that there is no leakage.
• Use a mirror in area that is difficult to see to check refrigerant leakage.
• Refrigerant leakage from evaporator can be detected by soaking cotton swab or a similar material with
drain hose water and illuminating it using UV lamp.
• Dust, dirt and packing materials adhesive used for condenser, evaporator, and other locations may fluo- resce. Be careful not to misidentify leakage.
5. Repair or replace parts where refrigerant leakage occurs and wipe off fluorescent leak detection dye. NOTE:
Completely wipe off fluorescent leak detection dy e from gaps between parts, screw threads, and others
using a cotton swab or similar materials.
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, follow the manufacturer operating instructions.
• Dust, dirt, and packing materials adhesive used for condenser, evaporator, and other locations may flu-
oresce. Be careful not to misidentify leakage.
CHECK REFRIGERANT LEAKAGE USING ELECTRICAL LEAK DETECTOR
WARNING:
Do not check refrigerant leakage while the engine is running.
CAUTION:
Be careful of the following it ems so that inaccurate checks or misidentifications are avoided.
• Do not allow refrigerant vapor, shop chemical vapor s, cigarette smoke or others around the vehicle.
• Always check refrigerant leakage in a low air flow en vironment so that refrigerant may not disperse
when leakage occurs.
1. Stop the engine.
2. Connect recovery/recycling/recharging equipment or manifold gauge set (J-39183-C) to A/C service
valve.
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 specif ied value, recycle refrigerant completely and fill
refrigerant to the specified level.
NOTE:
Leakages may not be detected if A/C refrigerant pressure is 345 kPa (3.52 kg/cm
2, 50 psi) or less when
temperature is less than 16 °C (61 °F).
4. Clean area where refrigerant leakage check is performed and check refrigerant leakage along all surfaces of pipe connections and A/C system components us ing electrical leak detector (J-41995) probe.
CAUTION:
• Continue checking when a leakag e is found. Always continue and complete checking along all
pipe connections and A/C system components for additional leakage.
• When a leakage is detected, clean leakage area using compressed air and check again.
• When checking leakage of cooling unit inside, always clean inside of drain hose so that the
probe surface may not be exposed to water or dirt.
NOTE:
• Always check leakage starting from high-pressure side and continue to low-pressure side.
• When checking leakage of cooling unit inside, operate bl ower fan motor for 15 minutes or more at the
maximum fan speed while the engine is stopped, and then in sert electrical 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 leak age is detected. (Leakage is detected but leakage area is
unknown.)
Revision: November 20132014 Altima NAM

REFRIGERANTHA-23
< PERIODIC MAINTENANCE >
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6. Start the engine and set A/C control in the following conditions. • A/C switch ON
• Air flow: VENT (ventilation)
• Intake door position: Recirculation
• Temperature setting: Full cold
• Fan (blower) speed: Maximum speed set
7. Run the engine at approximately 1,500 rpm for 2 minutes or more.
8. Stop the engine. Check again for refrigerant leakage. Go to step 4. WARNING:
Be careful not to get burned when the engine is hot.
NOTE:
• Start refrigerant leakage check immediately after the engine is stopped.
• When refrigerant circulation is stopped, pressure on the low- pressure side rises gradually, and after this, pressure on the
high-pressure side falls gradually.
• The higher the pressure is, the easier it is to find the refriger-
ant leakage.
Recycle RefrigerantINFOID:0000000009463928
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor is damaged
due to insufficient 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 may irritate eyes, nose, or throat.
• Do not allow HFC-134a to be exposed to an open flame or others because it generates poisonous
gas when in contact with high temperatur e objects. Keep workshop well ventilated.
1. Perform oil return operation. Refer to HA-25, "Perform Oil Return Operation"
. (If refrigerant or oil leakage
is detected in a large amount, omit this step, and go to step 2.)
CAUTION:
Do not perform oil return operation if a large am ount of refrigerant or oil leakage is detected.
2. Check gauge pressure 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 cap from the vehicle.
4. Connect recovery/recycling/recharging equipment to A/C service valve.
5. Operate recovery/recycling/recharging equipment , and recycle refrigerant from the vehicle.
6. Evacuate air for 10 minutes or more to remove any remaining refrigerant integrated to compressor oil, etc.
7. Refrigerant recycle operation is complete.
Charge RefrigerantINFOID:0000000009463929
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor is damaged
due to insufficient 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 or others because it generates poisonous
gas when in contact with high temperatur e objects. Keep workshop well ventilated.
SHA839E
Revision: November 20132014 Altima NAM

HA-24
< PERIODIC MAINTENANCE >
REFRIGERANT
1. Connect recovery/recycling/recharging equipment to the A/C service valve.
2. Operate recovery/recycling/recharging equipment, and evacuate air from A/C system for 25 minutes or
more.
CAUTION:
Evacuate air for 15 minutes or more if the parts are replaced.
3. Check the airtightness of A/C system for 25 minutes or more. If pressure raises more than the specified
level, charge A/C system with approximately 200g refriger ant and check that there is no refrigerant leak-
age. Refer to HA-21, "Leak Test"
.
CAUTION:
Check the airtightness for 15 minutes or more if the parts are replaced.
4. If parts other than compressor are replaced, fill co mpressor oil according to parts that are replaced.
5. Charge the specified amount of refrigerant to A/C system.
6. Check that A/C system operates normally.
7. Disconnect recovery/recycling/recharging equipment. (Col lect the refrigerant from the high-pressure hose
and low-pressure hose of recovery/recycling/recharging equipment.)
8. Install A/C service valve cap.
9. Refrigerant charge is complete.
Revision: November 20132014 Altima NAM

HA-26
< PERIODIC MAINTENANCE >
OIL
Oil Adjusting Procedure fo r Compressor Replacement
INFOID:0000000009463934
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. Connect recovery/recycling equipment to vehicle. Confi rm refrigerant purity in supply tank using recovery/
recycling equipment and refrigerant identifier. If NG, refer to HA-3, "Precaution for Working with HFC-134a
(R-134a)".
3. Confirm refrigerant purity in vehi cle A/C system using recovery/recycling equipment and refrigerant identi-
fier. If NG, refer to HA-3, "Precaution for Working with HFC-134a (R-134a)"
.
4. Discharge refrigerant into the refrigerant recove ry/recycling equipment. Measure oil discharged into the
recovery/recycling equipment.
Replace liquid tank 5 (0.2, 0.2)
Refrigerant leakage is detected Large amount leakage 30 (1.0, 1.1)
Small amount leakage —
Oil amount that is recycled together with refrigerant during recycle operation α
Conditions
Oil amount to be added to A/C system
m (US fl oz, Imp fl oz)
1. New compressor 2. Old compressor 3. Recovery/recycling equipment
4. Measuring cup X 5. Measuring cup Y 6. 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: November 20132014 Altima NAM

HA-28
< PERIODIC MAINTENANCE >
PERFORMANCE TEST
PERFORMANCE TEST
InspectionINFOID:0000000009463935
INSPECTION PROCEDURE
1. Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.
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 of test result is out of the specifi ed value, perform diagnosis by gauge pressure. Refer to HA-17,
"Symptom Table".
RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE
AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE
Surrounding condition Indoors or in the shade (in a well-ventilated place)
Vehicle condition Door Closed
Door glass Full open
Hood Open
Engine speed Idle speed
A/C condition Temperature control switch or dial Full cold
A/C switch ON
Air outlet VENT (ventilation)
Intake door position Recirculation
Fan (blower) speed Maximum speed set
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)
Revision: November 20132014 Altima NAM

PERFORMANCE TESTHA-29
< PERIODIC MAINTENANCE >
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Fresh air High-pressure (Discharge side)
kPa (kg/cm
2, psi) Low-pressure (Suction side)
kPa (kg/cm2, psi)
Relative humidity
% Air temperature
°C ( °F)
50 – 70 25 (77)
909 – 1,112
(9.2 – 11.3, 131.8 – 161.2) 159 – 194
(1.6 – 2.0, 23.1 – 28.1)
30 (86) 1,073 -– 1,312
(10.9 – 13.4, 155.6 – 190.2) 211 – 259
(2.2 – 2.6, 30.6 – 37.6)
35 (95) 1,445 – 1,766
(14.7 – 18.0, 209.5 – 256.1) 247 – 300
(2.5 – 3.1, 35.8 – 43.5)
40 (104) 1,650 – 2,017
(16.8 – 20.6, 239.3 – 292.5) 290 – 355
(3.0 – 3.6, 42.1 – 51.5)
Revision: November 20132014 Altima NAM