Qashqai J11. Heater & Air conditioning System - part 4

 

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Qashqai J11. Heater & Air conditioning System - part 4

 

 

APPLICATION NOTICE

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HOW TO USE THIS MANUAL

APPLICATION NOTICE

Information

INFOID:0000000010709188

Check the vehicle type to use the service information in this section.

Service information

Destination

Type 1

For Europe 

HRA2DDT engine models

Type 2

For Europe 

• K9K engine models
• R9M engine models

Type 3

Except for Europe

• HRA2DDT engine models
• MR20DD engine models

Type 4

Except for Europe

• K9K engine models
• R9M engine models

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PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000010501578

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 AIR BAG” and
“SEAT BELT” of this Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that 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 “SRS AIR BAG”.

• 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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never use air or electric 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 3 minutes before performing any service.

Precautions Necessary for Steering Wheel Rotation After Battery Disconnection

INFOID:0000000010501579

CAUTION:

Comply with the following cautions to prevent any error and malfunction.
• Before removing and installing any control units, first turn the ignition switch to the LOCK position,

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 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.

For vehicle with 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 operation pro-
cedure 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 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.

PRECAUTIONS

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5.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the ignition switch from ACC position to ON position, then to LOCK position. (The steering wheel will lock
when the ignition switch is turned to LOCK position.)

6.

Perform self-diagnosis check of all control units using CONSULT.

Precaution for Procedure without Cowl Top Cover

INFOID:0000000010501580

When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc to prevent damage to
windshield.

Precautions for Removing Battery Terminal

INFOID:0000000010503297

• With the adoption of Auto ACC function, ACC power is automatically supplied by operating the intelligent key

or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even
after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.

• When disconnecting the 12V battery terminal, turn off the ACC

power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.

•  For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.

•  After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to Instruction 1 or Instruction 2 described below.
For vehicles parked by ignition switch OFF, refer to Instruction 2.

INSTRUCTION 1

1.

Open the hood.

2.

Turn key switch to the OFF position with the driver side door opened.

3.

Get out of the vehicle and close the driver side door.

4.

Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.

CAUTION:

PIIB3706J

SEF289H

D4D engine

: 20 minutes

HRA2DDT

: 12 minutes

K9K engine

: 4 minutes

M9R engine

: 4 minutes

R9M engine

: 4 minutes

V9X engine

: 4 minutes

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PRECAUTIONS

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

5.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

INSTRUCTION 2 (FOR VEHICLES PARKED BY IGNITION SWITCH OFF)

1.

Unlock the door with intelligent key or remote keyless entry.
NOTE:
At this moment, ACC power is supplied.

2.

Open the driver side door.

3.

Open the hood.

4.

Close the driver side door.

5.

Wait at least 3 minutes.

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

6.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

Precautions For Refrigerant System Service

INFOID:0000000010501582

GENERAL REFRIGERANT PRECAUTION

WARNING:

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and

throat. Remove HFO-1234yf (R-1234yf) from the A/C system, using certified service equipment meet-
ing requirements of SAE J-2843 [HFO-1234yf (R-1234yf) Recovery/Recycling/Recharging Equipment
for Flammable Refrigerants for Mobile Air Conditioning Systems]. Ventilate work area before resum-
ing service if accidental system discharge occurs. Additional health and safety information may be
obtained from refrigerant and lubricant manufacturers.

• Never release refrigerant into the air. Use approved recovery/recycling recharging equipment to cap-

ture the refrigerant each time an air conditioning system is discharged.

• Wear always eye and hand protection (goggles and gloves) when working with any refrigerant or air

conditioning system.

• Never store or heat refrigerant containers above 52

°

C (126

°

F).

• Never heat a refrigerant container with an open flame; Place the bottom of the container in a warm

pail of water if container warming is required.

• Never intentionally drop, puncture, or incinerate refrigerant containers.
• Keep refrigerant away from open flames: poisonous gas is produced if refrigerant burns.
• Refrigerant displaces oxygen, therefore be certain to work in well ventilated areas to prevent suffo-

cation.

• Never pressure test or leakage test HFO-1234yf (R-1234yf) service equipment and/or vehicle air con-

ditioning systems with compressed air during repair. Some mixtures of air and HFO-1234yf (R-
1234yf) have been shown to be combustible at elevated pressures. These mixtures, if ignited, may
cause injury or property damage. Additional health and safety information may be obtained from
refrigerant manufacturers.

WORKING WITH HFO-1234yf (R-1234yf)

CAUTION:

• CFC-12 (R-12) or HFC-134a (R-134a) refrigerant and HFO-1234yf (R-1234yf) refrigerant are not com-

patible. Compressor malfunction is likely to occur if the refrigerants are mixed, refer to “CONTAMI-
NATED REFRIGERANT” below. To determine the purity of HFO-1234yf (R-1234yf) in the vehicle and
recovery tank, use Refrigerant recovery/recycling recharging equipment and Refrigerant Identifier.

• Use only specified lubricant for the HFO-1234yf (R-1234yf) A/C system and HFO-1234yf (R-1234yf)

components. Compressor malfunction is likely to occur if lubricant other than that specified is used.

• The specified HFO-1234yf (R-1234yf) lubricant rapidly absorbs moisture from the atmosphere. The

following handling precautions must be observed:

- Cap (seal) immediately the component to minimize the entry of moisture from the atmosphere when

removing refrigerant components from a vehicle.

PRECAUTIONS

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- Never remove the caps (unseal) until just before connecting the components when installing refrig-

erant components to a vehicle. Connect all refrigerant loop components as quickly as possible to
minimize the entry of moisture into system.

- Use only the specified lubricant from a sealed container. Reseal immediately containers of lubricant.

Lubricant becomes moisture saturated and should not be used without proper sealing.

- Never allow lubricant (ND-OIL 12) to come in contact with styrene foam parts. Damage may result.

CONTAMINATED REFRIGERANT

Take appropriate steps shown below if a refrigerant other than pure HFO-1234yf (R-1234yf) is identi-
fied in a vehicle:
• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage service equipment and refrigerant sup-

ply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

• In case of repairing, recover the refrigerant using only dedicated equipment and containers. Never

recover contaminated refrigerant into the existing service equipment. Contact a local refrigerant prod-
uct retailer for available service if the facility does not have dedicated recovery equipment. This refrigerant
must be disposed of in accordance with all federal and local regulations. In addition, replacement of all
refrigerant system components on the vehicle is recommended.

• The air conditioner warranty is void if the vehicle is within the warranty period. Please contact Nissan Cus-

tomer Affairs for further assistance.

REFRIGERANT CONNECTION

A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
• Expansion valve to evaporator
• Refrigerant pressure sensor to high-pressure pipe 1

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.

• Use always a torque wrench and a back-up wrench when connecting tubes.
• Plug immediately 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.

• Remove thoroughly 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.
• Never 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.

Name

: ND-OIL12

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PRECAUTIONS

• 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.

COMPRESSOR

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. Refer to 

HA-66, "Description"

.

• 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.

Service Equipment

INFOID:0000000010501583

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

RHA861F

PRECAUTIONS

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The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFO-1234yf (R-1234yf) 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

Be certain that the gauge face indicates HFO-1234yf or R-1234yf. Be sure the gauge set has 1/2

-16 ACME

threaded connections for service hoses. Confirm the set has been used only with refrigerant HFO-1234yf (R-
1234yf) and specified lubricants.

SERVICE HOSES

Be certain that the service hoses display the markings described. 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 HFO-1234yf (R-1234yf) service couplers
to the CFC-12 (R-12) and HFC-134a (R-134a) A/C system. The
HFO-1234yf (R-1234yf) couplers do not properly connect to the
CFC-12 (R-12) and HFC-134a (R-134a) system. However, if an
improper connection is attempted, discharging and contamination
may occur.

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFO-1234yf (R-1234yf) and specified 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.

RHA270DA

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

Close

RHA273D

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PREPARATION

PREPARATION

PREPARATION

Commercial Service Tools

INFOID:0000000010501574

HFO-1234yf (R-1234yf) Service Tool and Equipment

• Never mix HFO-1234yf (R-1234yf) refrigerant and/or its specified lubricant with CFC-12 (R-12) and HFC-

134a (R-134a) 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), HFC-134a (R-134a) and HFO-1234yf (R-
1234yf). 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

Recovery/recycling/recharg-
ing equipment

Function: 
• Refrigerant recovery, recycling and re-

charging

• Compliant with HFO-1234yf (R-1234yf)

Electrical leak detector

Power supply:
DC 12 V (Cigarette lighter)

Manifold gauge set (with hos-
es and couplers)

Identification:
• The gauge face indicates HFO-1234yf 

(R-1234yf).

Fitting size: Thread size

• 1/2

-16 ACME

RJIA0195E

SHA705EB

RJIA0196E

PREPARATION

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Sealant or/and Lubricant

INFOID:0000000010501575

HFO-1234yf (R-1234yf) Service Tool and Equipment

• Never mix HFO-1234yf (R-1234yf) refrigerant and/or its specified lubricant with CFC-12 (R-12) and HFC-

134a (R-134a) 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), HFC-134a (R-134a) and HFO-1234yf (R-
1234yf). 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.

Service hoses
• High-pressure side hose
• Low-pressure side hose
• Utility hose

Hose fitting to gauge:

• 1/2

-16 ACME

Compliant with HFO-1234yf (R-1234yf)

Service couplers
• High-pressure side coupler
• Low-pressure side coupler

Hose fitting to service hose:
M14 x 1.5 fitting is optional or permanently 
attached.
Compliant with HFO-1234yf (R-1234yf)

Refrigerant weight scale

For measuring of refrigerant
Fitting size: Thread size

1/2

-16 ACME

Compliant with HFO-1234yf (R-1234yf)

Vacuum pump
(Including the isolator valve)

Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz.)
Fitting size: Thread size

• 1/2

-16 ACME

Compliant with HFO-1234yf (R-1234yf)

Tool name

Description

S-NT201

S-NT202

S-NT200

S-NT203

HA-58

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PREPARATION

Tool name

Description

HFO-1234yf (R-1234yf) refrigerant

Container color: Light blue
Container marking: HFO-1234yf (R-
1234yf)
Fitting size: Thread size

• Large container 1/2

-16 ACME

ND-OIL12

Type: Polyalkylene glycol oil (PAG)
Application:
HFO-1234yf (R-1234yf) swash plate 
compressors

Capacity: 40 m

 (1.4 Imp fl oz.) 

S-NT196

JMIIA1759ZZ

COMPONENT PARTS

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SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000010501549

Component Description

INFOID:0000000010501550

JMIIA3523ZZ

1.

Refrigerant pressure sensor

2.

Compressor

3.

Condenser

4.

Liquid tank

5.

Expansion valve

6.

Evaporator

A.

Built-in A/C unit assembly

Component

Description

Evaporator

The mist form liquid refrigerant transforms to gas by evaporation by the air conveyed from blower 
motor. The air is cooled by the heat by evaporation.

Condenser

Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.

Compressor

Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant cycle.

Refrigerant pressure sensor

Refer to 

HAC-19, "Refrigerant Pressure Sensor"

 (AUTOMATIC AIR CONDITIONING SYSTEM) or 

HAC-148, "Refrigerant Pressure Sensor"

 (MANUAL AIR CINDITIONING SYSTEM).

Liquid tank

Eliminates foreign matter in refrigerant, and stores temporarily liquid refrigerant.

Expansion valve

Transforms high-pressure liquid refrigerant to mist form low-pressure liquid refrigerant by drawing 
function.

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< SYSTEM DESCRIPTION >

[TYPE 2]

SYSTEM

SYSTEM

System Diagram

INFOID:0000000010501551

System Description

INFOID:0000000010501552

REFRIGERANT CYCLE

Refrigerant Flow

The refrigerant from the compressor, flows the condenser with liquid tank, the evaporator, and returns to the
compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.

Freeze Protection

When intake sensor detects that evaporator surface temperature is 2

°

C (36

°

F) or less, A/C auto amp. (Auto-

matic air conditioning) or A/C amp. (Manual air conditioning) requests ECM to turn the compressor OFF, and
ECM makes A/C relay to OFF, and stops the compressor.

REFRIGERANT SYSTEM PROTECTION

Refrigerant Pressure Sensor

• The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure

sensor, installed at the high-pressure pipe 1. The refrigerant pressure sensor detects the pressure inside the
refrigerant line and sends the voltage signal to the ECM if the system pressure rises above, or falls below
the specifications. 

• ECM turns the A/C relay to OFF and stops the compressor when the high-pressure side detected by refriger-

ant pressure sensor is following conditions;

- Approximately 3,120 kPa (31.2 bar, 31.8 kg/cm

2

, 452 psi) or more (Engine speed is less than 1,500 rpm.)

- Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm

2

, 397 psi) or more (Engine speed is 1,500 rpm or more.)

- Approximately 140 kPa (1.4 bar, 1.4 kg/cm

2

, 20 psi) or less

Pressure Relief Valve

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere
when the pressure of refrigerant in the system increases to an unusual level [more than 3,800 kPa (38 bar,
38.8 kg/cm

2

, 551 psi)].

JMIIA3115GB

DIAGNOSIS AND REPAIR WORKFLOW

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000010501553

OVERALL SEQUENCE

DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

NNIIA0143GB

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[TYPE 2]

DIAGNOSIS AND REPAIR WORKFLOW

>> GO TO 2.

2.

SYMPTOM CHECK

Check the symptom from the customer's information. Check that any symptom occurs other than the inter-
viewed symptom.

Insufficient cooling/Heater>>GO TO 3.
Refrigerant leakage>>GO TO 6.
Noise >> GO TO 7.

3.

CONTROL SYSTEM DIAGNOSIS

Perform the system diagnosis for the A/C control system. Refer to 

HAC-68, "Work Flow"

 (AUTOMATIC AIR

CONDITIONING SYSTEM) or 

HAC-182, "Work Flow"

 (MANUAL AIR CONDITIONING SYSTEM), 

HAC-261,

"Work Flow"

 (MANUAL HEATER).

Is A/C control system normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

PERFORMANCE TEST

Perform the performance test. Check the operation of each part. Refer to 

HA-69, "Inspection"

.

>> GO TO 5.

5.

TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE

Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. Specify
the malfunctioning part. Refer to 

HA-71, "Symptom Table"

.

Low refrigerant charge>>GO TO 6.
Except above>>GO TO 8.

6.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Specify the malfunctioning part. Refer to 

HA-63, "Leak Test"

.

>> GO TO 8.

7.

TROUBLE DIAGNOSIS FOR NOISE

Perform trouble diagnosis for noise. Specify the malfunctioning part. Refer to 

HA-73, "Symptom Table"

.

>> GO TO 8.

8.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 9.

9.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.

Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 2.

REFRIGERANT

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Description

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CONNECTION OF SERVICE TOOLS AND EQUIPMENT

Leak Test

INFOID:0000000010501555

CHECK REFRIGERANT LEAKAGE USING ELECTRICAL LEAK DETECTOR

WARNING:

Never check refrigerant leakage while the engine is running.

CAUTION:

Be careful of the following items so that inaccurate checks or misidentifications are avoided.
• Never allow refrigerant vapor, shop chemical vapors, cigarette smoke, or others around the vehicle.
• Always check refrigerant leakage in a low air flow environment so that refrigerant may not disperse

when leakage occurs.

1.

Stop the engine.

2.

Connect recovery/recycling/recharging equipment or manifold gauge set to A/C service valve.

3.

Check that A/C refrigerant pressure is 345 kPa (3.45 bar, 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 fill refrigerant to the specified level.
NOTE:
Leakages may not be detected if A/C refrigerant pressure is 345 kPa (3.45 bar, 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 sur-
faces of pipe connections and A/C system components using electrical leak detector probe.

CAUTION:

• Continue checking when a leakage 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:

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/recycling recharging 
equipment

4.

Vacuum pump

5.

Manifold gauge set

6.

Refrigerant container (HFO-1234yf)

7.

Weight scale

A.

Preferred (best) method

B.

Alternative method

C.

For charging

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[TYPE 2]

REFRIGERANT

• Always check leakage starting from high-pressure side and continue to low-pressure side.
• When checking leakage of cooling unit inside, operate blower fan motor for 15 minutes or more at the

maximum fan speed while the engine is stopped, and then insert 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 leakage is detected. (Leakage is detected but leakage area is
unknown. GO TO 6.)

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 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 4.

WARNING:

Never 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 Refrigerant

INFOID:0000000010501556

WARNING:

• Always use HFO-1234yf for A/C refrigerant. If CFC-12 or HFC-134a is accidentally charged, compres-

sor is damaged due to insufficient lubrication.

• Always observe and follow precautions described on refrigerant container. Incorrect handling may

result in an explosion of refrigerant container, frostbite, or the loss of eyesight.

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose, or

throat.

• Never allow HFO-1234yf to be exposed to an open flame or others because it generates poisonous

gas when in contact with high temperature objects. Keep workshop well ventilated.

1.

Perform lubricant return operation. Refer to 

HA-66, "Perform Lubricant Return Operation"

. (If refrigerant or

lubricant leakage is detected in a large amount, omit this step, and then GO TO 2.)

CAUTION:

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

2.

Check gauge pressure readings of recovery/recycling/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. Never 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 lubri-
cant, etc.

7.

Refrigerant recycle operation is complete.

SHA839E

 

 

 

 

 

 

 

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