Nissan GT-R (2007-2014 year). HEATER & AIR CONDITIONING CONTROL SYSTEM. Service Manual — part 2

PRECAUTIONS

HA-17

< PRECAUTION >

• Perform leakage test and make sure that there is no leakage from connections after connecting line.

Disconnect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten
connections of seal seat to the specified torque.

Service Equipment

INFOID:0000000009160180

RECOVERY/RECYCLING RECHARGING 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.

ELECTRICAL LEAK DETECTOR

Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.

VACUUM PUMP

The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric pres-
sure. So the vacuum pump lubricant may migrate out of the pump
into the service hose. This is possible when the pump is switched
OFF after evacuation (vacuuming) and hose is connected to it.
To prevent this migration, use a manual valve placed near the hose-
to-pump connection, as per the following.
• Vacuum pumps usually have a manual isolator valve as part of the

pump. Close this valve to isolate the service hose from the pump.

• Use a hose equipped with a manual shut-off valve near the pump

end for pumps without an isolator. Close the valve to isolate the
hose from the pump.

• Disconnect the hose from the pump if the hose has an automatic

shut-off valve. As long as the hose is connected, the valve is open
and lubricating oil may migrate.

Some one-way valves open when vacuum is applied and close
under no vacuum condition. Such valves may restrict the pump’s
ability to pull a deep vacuum and are not recommended.

MANIFOLD GAUGE SET

RHA861F

RHA270DA

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HA-18

< PRECAUTION >

PRECAUTIONS

Be certain that the gauge face indicates HFC-134a or R-134a. Be
sure the gauge set has 1/2

″

-16 ACME threaded connections for ser-

vice hoses. Confirm the set has been used only with refrigerant
HFC-134a (R-134a) and specified lubricants.

SERVICE HOSES

Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must equip positive shut-
off devices (either manual or automatic) near the end of the hoses
opposite to the manifold gauge.

SERVICE COUPLERS

Never attempt to connect HFC-134a (R-134a) service couplers to
the CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers
do not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied lubricants have been used with the scale. The hose fitting must
be 1/2

″

-16 ACME if the scale controls refrigerant flow electronically.

CHARGING CYLINDER

Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder’s top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.

SHA533D

RHA272D

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

RHA273D

RHA274D

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COMPRESSOR

HA-19

< PRECAUTION >

COMPRESSOR

General Precautions

INFOID:0000000009160181

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

compressor. (This work should be performed by GT-R certified NISSAN dealer.)

• 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 distributes equally 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 one and check for normal operation after replacing the compressor magnet

clutch.

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HA-20

< PRECAUTION >

LEAK DETECTION DYE

LEAK DETECTION DYE

General Precautions

INFOID:0000000009160182

CAUTION:

• The A/C system contains a fluorescent leak detection dye used for locating refrigerant leakages. An

ultraviolet (UV) lamp is required to illuminate the dye when inspecting for leakages.

• Wear always 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 leak detector (SST: J-41995).

The fluorescent dye leak detector should be used in conjunction with an electrical leak detector
(SST: J-41995) to pin-point refrigerant leakages.

• Read and follow all manufacture’s operating instructions and precautions prior to performing the

work for the purpose of safety and customer’s satisfaction.

• A compressor shaft seal should not necessarily be repaired because of dye seepage. The compres-

sor shaft seal should only be repaired after confirming the leakage with an electrical leak detector
(SST: J-41995).

• Remove always any remaining dye from the leakage area after repairs are completed to avoid a mis-

diagnosis during a future service.

• Never allow dye to come into contact with painted body panels or interior components. Clean imme-

diately with the approved dye cleaner if dye is spilled. Fluorescent dye left on a surface for an
extended period of time cannot be removed.

• Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
• Never 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. Never 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 for three or more years unless a compressor malfunc-

tion occurs.

IDENTIFICATION

NOTE:
Vehicles with factory installed fluorescent dye have a green label.
Vehicles without factory installed fluorescent dye have a blue label.

IDENTIFICATION LABEL FOR VEHICLE

Vehicles with factory installed fluorescent dye have the identification label on the front side of hood.

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PREPARATION

HA-21

< PREPARATION >

PREPARATION

Commercial Service Tool

INFOID:0000000009160184

Sealant or/and Lubricant

INFOID:0000000009160185

HFC-134a (R-134a) Service Tool and Equipment

• Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/

or its lubricant.

• Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/

lubricant.

• Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles

refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.

• Never use adapters that convert one size fitting to another: refrigerant/lubricant contamination occurs and

compressor malfunction may result.

Tool name

Description

Refrigerant identifier equipment

Checking for refrigerant purity and
system contamination

Power tool

For loosening bolts and nuts

RJIA0197E

PBIC0190E

Tool name

Description

HFC-134a (R-134a) refrigerant

Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size

• Large container 1/2

″

-16 ACME

NISSAN A/C System Oil Type S
(DH-PS)

Type: Polyalkylene glycol oil (PAG),
type S (DH-PS)
Application:
HFC-134a (R-134a) swash plate com-
pressors (NISSAN only)

Capacity: 40 m

(1.4 US fl oz., 1.4

Imp fl oz.)

S-NT196

S-NT197

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HA-22

< PERIODIC MAINTENANCE >

REFRIGERANT

PERIODIC MAINTENANCE

REFRIGERANT

Collection and Charge

INFOID:0000000009160186

SETTING OF SERVICE TOOLS AND EQUIPMENT

Discharging Refrigerant

Evacuating System and Charging Refrigerant

Procedure

Shut-off valve

A/C service valve

Recovery/recycling recharging
equipment

JSIIA0238ZZ

Shut-off valve

A/C service valve

Recovery/recycling recharging
equipment

Refrigerant container (HFC-134a)

Weight scale (J-39650)

Vacuum pump (J-39649)

Manifold gauge set (J-39183)

Preferred (best) method

Alternative method

For charging

JSIIA0239ZZ

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REFRIGERANT

HA-23

< PERIODIC MAINTENANCE >

WARNING:

Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting requirements
of SAE J-2210 [HFC-134a (R-134a) recycling equipment] or J-2209 [HFC-134a (R-134a) recovery equip-
ment]. Ventilate work area before resuming service if accidental system discharge occurs. Additional
health and safety information may be obtained from refrigerant and lubricant manufacturers.

CHECK A/C SYSTEM

Check that A/C system operates normally. (This work should be performed by GT-R certified NISSAN
dealer.)

Check if there is a large amount of leakage of refrigerant or lubricant.

CAUTION:

Never perform the lubricant return operation if a large amount of leakage of lubricant is detected.

Is the inspection result normal?

YES

>> GO TO 2.

>> Check for refrigerant leakage. Refer to

HA-28, "Inspection"

LUBRICANT RETURN OPERATION

Start the engine and run it as follows.

Engine speed: Idle – 1,200 rpm

A/C switch: ON

Fan speed: Maximum position

Set temperature: Full hot

Intake position: Recirculation (REC)

Perform lubricant return operation for approximately 10 minutes.

Stop the engine.

>> GO TO 3.

CHECK RECOVERY/RECYCLING RECHARGING EQUIPMENT

Operate recovery/recycling recharging equipment.

CAUTION:

• Follow the instructions of the manufacturer for the handling or maintenance of the equipment.
• Never fill the equipment with undesignated refrigerant.

Check the gauge pressure of recovery/recycling recharging equipment.

Is there pressure?

YES

>> GO TO 4.

>> GO TO 5.

DISCHARGE REFRIGERANT INSIDE PIPES

Discharge the refrigerant from the high-pressure hose and low-pressure hose of recovery/recycling recharging
equipment.

>> GO TO 5.

CONNECT RECOVERY/RECYCLING RECHARGING EQUIPMENT

Remove the service valve caps from the vehicle.

Connect recovery/recycling recharging equipment to the service valves.

>> GO TO 6.

DISCHARGE REFRIGERANT FROM THE VEHICLE

Operate recovery/recycling recharging equipment to discharge the refrigerant from the vehicle.

>> GO TO 7.

REMOVE ANY REMAINING REFRIGERANT

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HA-24

< PERIODIC MAINTENANCE >

REFRIGERANT

Evacuate air for approximately 10 minutes or more to remove any remaining refrigerant integrated to the com-
pressor oil, etc.

>> GO TO 8.

REPLACE OR REPAIR REFRIGERANT SYSTEM PARTS

Replace or repair the malfunctioning part.

CAUTION:

• Always use a new O-ring for the parts that the cooler system was removed.
• Apply compressor oil to the O-rings of piping when installing the piping. However, never apply it

to the threads.

Adjust the compressor oil amount according to the replaced parts. (This work should be performed by GT-
R certified NISSAN dealer.)

>> GO TO 9.

EVACUATE AIR FROM THE REFRIGERANT SYSTEM

Evacuate air from the refrigerant system for approximately 25 minutes or more.

CAUTION:

Evacuate air for at least approximately 15 minutes or more if the parts are replaced.

>> GO TO 10.

10.

CHECK AIRTIGHTNESS OF REFRIGERANT SYSTEM

Check the airtightness of the refrigerant system for approximately 25 minutes or more.

CAUTION:

Check the airtightness for at least approximately 15 minutes or more if the parts are replaced.

Does the pressure decrease?

YES

>> GO TO 11.

>> GO TO 8.

11.

CHECK REFRIGERANT LEAKAGE

Connect refrigerant recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).

Charge the refrigerant of approximately 200 g (7.05 oz) to the refrigerant system.

Check for refrigerant leakage. Refer to

HA-28, "Inspection"

NOTE:
When using electrical leak detector (SST: J-41995). Refer to

HA-29, "Inspection"

Is the inspection result normal?

YES

>> GO TO 12.

>> Repair or replace parts according to the inspection results.

12.

CHARGE REFRIGERANT

Connect recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).

Evacuate air again.

Charge the specified amount of refrigerant to the refrigerant system.

>> GO TO 13.

13.

CHECK REFRIGERANT LEAKAGE

Check for refrigerant leakage again. Refer to

HA-28, "Inspection"

NOTE:
When using electrical leak detector (SST: J-41995). Refer to

HA-29, "Inspection"

Is the inspection result normal?

YES

>> GO TO 14.

>> GO TO 6.

14.

CHECK OPERATION

Check the A/C system for normal operation. Refer to

HA-26, "Inspection"

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REFRIGERANT

HA-25

< PERIODIC MAINTENANCE >

Is the inspection result normal?

YES

>> GO TO 15.

>> Repair or replace parts according to the inspection results.

15.

CHECK RECOVERY/RECYCLING RECHARGING EQUIPMENT

Disconnect recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).

Discharge the refrigerant from the high-pressure hose and low-pressure hose of the recovery/recycling
recharging equipment.

Install the service valve caps.

>> INSPECTION END

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HA-26

< PERIODIC MAINTENANCE >

REFRIGERATION SYSTEM

REFRIGERATION SYSTEM

Inspection

INFOID:0000000009160191

CHECK THE BLOWER MOTOR OPERATION

Check the blower motor operation. (This work should be performed by GT-R certified NISSAN dealer.)
Is the inspection result normal?

YES

>> GO TO 2.

>> Repair or replace the parts according to the inspection results.

CHECK COMPRESSOR OPERATION

Check compressor operation. (This work should be performed by GT-R certified NISSAN dealer.)
Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace the parts according to the inspection results.

CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform the diagnosis with the gauge
pressure. Refer to

HA-7, "Trouble Diagnosis For Unusual Pressure"

Is the inspection result normal?

YES

>> Perform the performance test. Refer to

HA-26, "Performance Chart"

>> Repair or replace the parts according to the inspection results.

Performance Chart

INFOID:0000000009160192

TEST CONDITION

Testing must be performed as per the following:

TEST READING

Recirculating-to-discharge Air Temperature Table

Vehicle condition

Indoors or in the shade (in a well-ventilated place)

Doors

Closed

Door windows

Open

Hood

Open

Temperature control switch or dial

Maximum cold

Mode switch

(Ventilation) set

Intake switch

(Recirculation) set

Fan (blower) speed

Maximum speed set

Engine speed

Idle speed

Operate the air conditioning system for 10 minutes before taking measurements.

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature at center ventilator

C (

Relative humidity

Air temperature

C (

50 - 60

20 (68)

6.0 – 8.0 (43 – 46)

25 (77)

8.4 – 10.9 (47 – 52)

30 (86)

14.5 – 17.5 (58 – 64)

60 - 70

20 (68)

7.1 – 9.1 (45 – 48)

25 (77)

10.9 – 13.4 (52 – 57)

30 (86)

17.5 – 20.5 (64 – 69)

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REFRIGERATION SYSTEM

HA-27

< PERIODIC MAINTENANCE >

Ambient Air Temperature-to-operating Pressure Table

Refrigerant Leakages

INFOID:0000000009160193

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 [refrigerant dye leak detection kit (SST: J-43926)].
Confirm the leakage with an electrical leak detector if dye is observed. It is possible a prior leakage was
repaired and not properly cleaned.
If a leakage is found but continue checking for additional leakages at all system components 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.
NOTE:
Moving the electrical leak detector probe slower and closer to the suspected leakage area improves the
chances of finding a leakage.

Ambient air

High-pressure (Discharge side)

kPa (kg/cm

, psi)

Low-pressure (Suction side)

kPa (kg/cm

, psi)

Relative humidity

Air temperature

C (

50 - 70

25 (77)

1,204 – 1,471

(12.3 – 15.0, 174.6 – 213.3)

171 – 209

(1.7 – 2.1, 24.8 – 30.3)

30 (86)

1,300 – 1,590

(13.3 – 16.2, 188.5 – 230.6)

196 – 240

(2.0 – 2.4, 28.4 – 34.8)

35 (95)

1,500 – 1,820

(15.3 – 18.6, 217.5 – 263.9)

229 – 280

(2.3 – 2.9, 33.2 – 40.6)

40 (104)

1,870 – 2,285

(19.1 – 23.3, 271.2 – 331.3)

292 – 357

(3.0 – 3.6, 42.3 – 51.8)

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HA-28

< PERIODIC MAINTENANCE >

FLUORESCENT LEAK DETECTOR

FLUORESCENT LEAK DETECTOR

Inspection

INFOID:0000000009160194

CHECKING SYSTEM FOR LEAKAGES USING THE FLUORESCENT LEAK DETECTOR

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.

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.

Remove any residual dye using dye cleaner (SST: J-43872) to prevent future misdiagnosis after the leak-
age is repaired.

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.)

Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm

, 50 psi).

Pour one bottle [1/4 ounce (7.4 cc)] of the A/C refrigerant dye into the injector tool (SST: J-41459).

Connect the injector tool to the A/C low-pressure side service valve.

Start the engine. Then A/C switch ON.

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).

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.

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.

Attach a blue label if necessary.

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ELECTRICAL LEAK DETECTOR

HA-29

< PERIODIC MAINTENANCE >

ELECTRICAL LEAK DETECTOR

Inspection

INFOID:0000000009160195

PRECAUTIONS FOR HANDLING LEAK DETECTOR

Use an electrical leak detector (SST: J-41995) 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.

Position probe approximately 3 mm (0.12 in) away from point to
be checked.

Circle each fitting completely with probe when testing.

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.

Stop the engine.

AHA281A

JSIIA1099GB

SHA706E

SHA708EA

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HA-30

< PERIODIC MAINTENANCE >

ELECTRICAL LEAK DETECTOR

Connect a suitable manifold gauge set (SST: J-39183) to the A/C service valves.

Check if the A/C refrigerant pressure is at least 345 kPa (3.52 kg/cm

, 50 psi) above 16

C (61

F).

Recover/evacuate and recharge the system with the specified amount of refrigerant if less than specifica-
tion.
NOTE:
Leakages may not be detected since the system may not reach 345 kPa (3.52 kg/cm

, 50 psi) at temper-

atures below 16

C (61

F).

Perform the leakage test in the numerical as shown in the figure. [high-pressure side (compressor dis-
charge “1” to evaporator inlet “9”) to low-pressure side (evaporator drain hose “10” to shaft seal “15”)]
Clean the component to be checked and move the leakage detected probe completely around the con-
nection/component.

NOTE:
Check the following carefully.

Service valves

• Check all around the service valves. Ensure service valve caps are secured on the service valves (to

prevent leakages).

• Wipe any residue from valves to prevent any false readings by leak detector after removing manifold

gauge set (SST: J-39183) 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.

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.

If a leakage is found, but continue checking for additional leakages at all system components.
When leakages are not found, go to next step.

Start the engine.

Set the A/C control as per the following;

A/C switch: ON

Air flow: VENT

JSIIA1255ZZ

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ELECTRICAL LEAK DETECTOR

HA-31

< PERIODIC MAINTENANCE >

Intake door position: REC

Temperature setting: Maximum cold

Fan speed: High

Run engine at 1,500 rpm for at least 2 minutes.

10. Stop the engine and perform leakage check again, steps 4 – 6.

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, and then check refrigerant purity.

12. Confirm refrigerant purity in supply tank using recovery/recycling recharging equipment and refrigerant

identifier.

13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-

erant identifier.

14. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-

ponent if necessary.

15. Evacuate and recharge A/C system and perform the leakage test to confirm no refrigerant leakages.

16. Perform A/C performance test to ensure system works normally.

SHA839E

Revision: 2012 November

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HAC-1