system NISSAN TERRANO 2004 Service Repair Manual

HFC-134a (R-134a) Service Tools and
Equipment
It is important to understand that HFC-134a (R-134a) refrigerant, and the specified lubricant which must be
used with HFC-134a (R-134a), must never be mixed with CFC-12 (R-12) refrigerant and/or the CFC-12 (R-12)
lubricant.
This means that separate and non-interchangeable service equipment must be used for handling each type
of refrigerant/lubricant.
To prevent the mixing of refrigerants/lubricants, 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).
Adaptors to convert from one size of fitting to another must never be used: refrigerant/lubricant contamination
will occur and compressor failure will result.
Tool number
(Kent-Moore No.)
Tool nameDescription Note
HFC-134a (R-134a)
refrigerant
Container color: Light blue
Container marking: HFC-134a (R-134a)
Fitting size: Thread size
I Large container 1/2² -16 ACME
KLH00-PAGS0
(Ð)
Nissan A/C System Oil
Type S (DH-PS)
Type: Poly alkyline glycol oil (PAG), type S
Application: HFC-134a (R-134a) swash plate
compressors (Nissan only)
Lubricity: 40 m (1.4 Imp fl oz)
(J-39500-NI) (115V)
(J-39635) (220V)
Recovery/Recycling/
Recharging
equipment (ACR4)
Function: Refrigerant Recovery and
Recycling and Recharging
(J-39400)
Electrical leak detector
Power supply:
I DC 12V (Cigarette lighter)
PREPARATION
HA-12
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Precautions for Service Equipment
RECOVERY/RECYCLING/RECHARGING EQUIPMENT
Be certain to follow the manufacturers instructions for machine
operation and machine maintenance. Never introduce any refriger-
ant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Be certain to follow the manufactures instructions for tester opera-
tion 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.
Since the vent side of the vacuum pump is exposed to atmospheric
pressure, it is possible for the vacuum pump lubricant to migrate
out of the pump into the service hose if the pump is switched off
after evacuation (vacuuming) and the service hose is not isolated
from the vacuum pump.
To prevent the migration of vacuum pump lubricant into service
hoses, it is necessary to use a valve (which can be manually
opened or closed) near the connection of the service hose to the
pump.
IOn a vacuum pump which is equipped with an isolator valve
(usually part of the vacuum pump), closing this valve will iso-
late the service hose from the pump.
I For pumps without an isolator valve, be certain that the service
hose is equipped with a manual shut off valve near the pump
end of the hose.
I Hoses which contain an automatic shut off valve at the end of
the service hose must be disconnected from the vacuum pump
to prevent the migration of lubricant: as long as the hose is
connected, the valve is open and lubricant may migrate.
One-way valves which open when vacuum is applied and close
under a no vacuum condition are not recommended, because this
valve may restrict the pump's ability to pull a deep vacuum.
MANIFOLD GAUGE SET
Be certain that the gauge face indicates R-134a or 134a. Be cer-
tain that the manifold gauge set has the 1/2 ²-16 ACME threaded
connections for service hoses, and that no refrigerants other than
HFC-134a (R-134a) (along with only specified lubricants) have
been used with the manifold gauge set.
RHA270D
SHA814D
PREPARATION
HA-14
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SERVICE HOSES
Be certain that the service hoses display the markings described
(colored hose with black stripe). Be certain that all hoses include
positive shut off devices (either manual or automatic) near the end
of the hoses opposite the manifold gauge.
SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to
an CFC-12 (R-12) A/C system. Although the HFC-134a (R-134a)
couplers will not secure on to the CFC-12 (R-12) system, CFC-12
(R-12) refrigerant and lubricant will be discharged into the HFC-
134a (R-134a) coupler, causing contamination.
Shut off valve rotationA/C service valve
Clockwise Open
Counterclockwise Close
REFRIGERANT WEIGHT SCALE
If the scale allows electronic control of the flow of refrigerant
through the scale, be certain that the hose fitting size is 1/2 ²-16
ACME, and that no refrigerant other than HFC-134a (R-134a)
(along with only specified lubricant) has been used with the scale.
CHARGING CYLINDER
The charging cylinder is not recommended because refrigerant
may be vented into the air from the top valve of the cylinder when
filling the cylinder with refrigerant. Additionally, the accuracy of the
cylinder is generally less than that of an electronic scale or of qual-
ity recycle/recharge equipment.
RHA272D
RHA273D
RHA274D
PREPARATION
Precautions for Service Equipment (Cont'd)
HA-15
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HFC-134a (R-134a) Service Procedure
DISCHARGING REFRIGERANT
WARNING:
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. To remove HFC-134a (R-134a) from the A/C system, use service equipment certified to meet the
requirements of HFC-134a (R-134a) recycling equipment or HFC-134a (R-134a) recovery equipment. If
accidental system discharge occurs, ventilate work area before resuming service. Additional health
and safety information may be obtained from refrigerant and lubricant manufacturers.
EVACUATING SYSTEM AND CHARGING REFRIGERANT
SHA559D
SHA560D
SERVICE PROCEDURES
HA-16
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Set the recovery/recycling/rechargingequipment.
Recovered lubrication oilRefer to LUBRICATION
OIL Ð Checking and
Adjusting. Discharge refrigerant into recovery/
recycling/recharging equipment.
Repair or replace parts.
Evacuate the unwanted air in charging hoses.
Evacuating (over 25 minutes).
Check air tightness.ERepair.
G
ECharging [approx. 200 g (7.05 oz)].
*-1
Preliminary refrigerant leak check.
Complete charging
[specified amount Ð 200 g (7.05 oz)].
*-1
Check for refrigerant leaks.
*-2
Check for A/C operation and A/C cooling performance
Remove service couplers from A/C service valves.
Recover refrigerant in charging hoses.
Note: *-1 Before charging refrigerant, ensure engine is off.*-2 Before checking for leaks, start engine to activate air conditioning system then turn it off.
Service valve caps must be attached to valves (to prevent leak).
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SERVICE PROCEDURES
HFC-134a (R-134a) Service Procedure (Cont'd)
HA-17
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Lubrication Oil
Name: Nissan A/C System Oil Type S
Part number: KLH00-PAGS0
Maintenance of Oil Quantity in Compressor
The oil used to lubricate the compressor circulates through the
system with the refrigerant. Whenever any component of the sys-
tem is replaced or a large amount of gas leakage occurs, add oil
to the compressor to maintain the specified amount.
If oil quantity is not maintained properly, the following malfunctions
may result:
ILack of oil: May lead to a seized compressor
I Excessive oil: Inadequate cooling (thermal exchange impeded)
Checking and Adjusting
Adjust the oil quantity according to the flowchart shown below.
START
Can oil return operation be performed?
IA/C system works properly.
I There is no evidence of a large amount
of oil leakage.
No
EYe s
Perform oil return operation, proceeding as follows:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 1. Start engine, and set the following conditions:
I Test condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature is 25 to
30ÉC (77 to 86ÉF).]
2. Perform oil return operating for about 10 minutes.
3. Stop engine.
CAUTION:
If excessive oil leakage is noted, do not perform the oil return operation.
Should the compressor be replaced?
No Yes
qA(Go to next page.)
Is there any part to be replaced?
(Evaporator, condenser, liquid tank or in
case there is evidence of a large amount
of oil leakage.)
No
EYe s After replacing any of the following major components of the system, be sure
to add the correct amount of oil to the system.
Amount of oil to be added
*1: If compressor is replaced, addition of oil is included in the flow chart.
*2: If refrigerant leak is small, no addition of oil is needed. ªRatioº in this table indicates the ratio of added oil to the overall amount of oil needed in the
system.
Carry out the A/C performance test.F
Part replaced Oil to be added to system
Remarks
Amount of oil m (Imp fl oz)
Evaporator 75 (2.6)Ð
Condenser 75 (2.6)Ð
Liquid tank 5 (0.2)Add if compressor is
not replaced. *1
In case of refrigerant
leak 30 (1.1)
Large leak
Ð Small leak *2
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LUBRICATION OIL Ð Checking and Adjusting
HA-23
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How to Perform Trouble Diagnoses for Quick
and Accurate Repair
WORK FLOW
CHECK INFReference item
LISTEN TO CUSTOMER COMPLAINT AND CON-
FIRM BY PERFORMING OPERATIONAL CHECK.
Can be
confirmedCannot be
confirmed
EDUCATE CUSTOMER ON
CORRECT OPERATION OF
SYSTEM.
LISTEN TO CUSTOMER COMPLAINTS AND
CONFIRM.FSymptom Chart
(See page HA-37.)
INVESTIGATE ITEMS YOU SHOULD CARRY
OUT RELATED TO EACH SYMPTOM.FSymptom Chart
(See page HA-37.)
EELIMINATE GOOD SYSTEM(S)/PART(S).FPreliminary Check
(See pages HA-38.)
CHECK MAIN POWER SUPPLY AND GROUND
CIRCUITS.FMain Power Supply and Ground Circuit
Check
(See page HA-52.)
Diagnostic
Procedure(s)
(See pages HA-53 -
55.)EELIMINATE GOOD PART(S)/HARNESS(ES)/
CONNECTOR(S) ELECTRICALLY.FHarness Layout for A/C System
(See page HA-40.)
Malfunctioning
harness(es)/
connector(s) Malfunctioning
part(s)
INSPECT EACH
COMPONENT.
FElectrical Components Inspection
(See page HA-61.)
REPAIR.
H
REPAIR/REPLACE.
NG FINAL CHECK
OK
CHECK OUT
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DIAGNOSES Ð Overall System
HA-28
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Operation Check
The purpose of the operational check is to confirm that the system
is as it should be. The systems which will be checked are the
blower, mode (discharge air), intake air, temperature decrease,
temperature increase and A/C switch system.
CONDITIONS:
Engine running and at normal operating temperature.
PROCEDURE:
1. Check blower
1) Turn FAN CONTROL DIAL to 1.Blower should operate at speed 1.
2) Then turn the DIAL to speed 2.
3) Continue checking blower speed until all speeds are checked.
4) Leave blower on speed 4.
2. Check discharge air
1) Turn AIR CONTROL DIAL toposition.
2) Confirm that all discharge air comes out of face vents.
3) Turn AIR CONTROL DIAL to
position.
4) Confirm that discharge air comes out of face vents and foot vents.
5) Turn AIR CONTROL DIAL to
position.
6) Confirm that discharge air comes out of foot vents, with some air from face vents.
7) Turn AIR CONTROL DIAL to
position.
8) Confirm that discharge air comes out of foot vents with some air from defroster vents.
9) Turn AIR CONTROL DIAL to
position.
10) Confirm that all discharge air comes out of defroster vents, with some air from face vents.
3. Check recirculation
1) Switch AIR RECIRCULATION SWITCH to ON position (Indica-tor light ON).
2) Listen for intake door position change (you should hear sound change slightly).
NHA333
NHA334
RHA035E
NHA335
DIAGNOSES Ð Overall System
HA-29
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4. Check temperature decrease
1) Turn TEMPERATURE CONTROL DIAL to full cold (counter-clockwise).
2) Check for cold air at discharge air outlets.
5. Check temperature increase
1) Turn TEMPERATURE CONTROL DIAL to full hot (clockwise).
2) Check for hot air at discharge air outlets.
6. Check A/C switch
Turn FAN CONTROL DIAL to the desired position (1 to 4) and
switch AIR CONDITIONER SWITCH to turn ON air conditioner.
Indicator light will come on when air conditioner is ON.
NHA336
NHA337
NHA338
DIAGNOSES Ð Overall System
Operation Check (Cont'd)
HA-30
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Performance Chart
TEST CONDITION
Testing must be performed as follows:
Vehicle location:Indoors or in the shade (in a well-ventilated place)
Doors: Closed
Door window: Open (Front driver side only)
Hood: Open
TEMP. control dial position: Max. COLD
AIR control dial position:
(Ventilation)
Air recirculation switch position:
(Recirculation)
Fan control dial position: 4
Engine speed: 1,500 rpm
Time required before starting testing
after air conditioner starts operating: More than 10 minutes
TEST READING
Recirculating-to-discharge air temperature table
Inside air (Recirculating air)
at blower assembly inlet Discharge air temperature at center ventilator
ÉC (ÉF)
Relative humidity
% Air temperature
ÉC (ÉF)
40-60 25 (77) 9.8 - 11.5 (50 - 53)
30 (86) 13.8 - 15.9 (57 - 61)
35 (95) 17.9 - 20.3 (64 - 69)
60-80 25 (77) 11.5 - 13.3 (53 - 56)
30 (86) 15.9 - 18.0 (61 - 64)
35 (95) 20.3 - 22.7 (69 - 73)
Ambient air temperature-to-compressor pressure table
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2, psi) Low-pressure (Suction side)
kPa (bar, kg/cm2, psi)
Relative humidity
% Air temperature
ÉC (ÉF)
40-80 25 (77)
1,451 - 1,608 (14.51 - 16.08,
14.8 - 16.4, 210 - 233) 157 - 186 (1.57 - 1.86, 1.6 - 1.9,
23 - 27)
30 (86) 1,569 - 1,804 (15.69 - 18.04,
16.0 - 18.4, 228 - 262) 176 - 235 (1.76 - 2.35, 1.8 - 2.4,
26 - 34)
35 (95) 1,834 - 2,138 (18.34 - 21.38,
18.7 - 21.8, 266 - 310) 226 - 304 (2.26 - 3.04, 2.3 - 3.1,
33 - 44)
DIAGNOSES Ð Overall System
HA-31
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