NISSAN NAVARA 2005 Repair Workshop Manual

PREPARATION
ATC-17
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AT C
Recovery/Recycling/
Recharging equipment (ACR4)Function: Refrigerant recovery and
recycling and recharging
Electrical leak detectorPower supply:
DC 12V (Cigarette lighter)
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
HFC-134a (R-134a) dye injector
Use with J-41447, 1/4 ounce
bottle
(J-41447)
HFC-134a (R-134a) fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)
(J-43872)
Refrigerant dye cleanerPower supply:
DC 12V (Battery terminal)
(J-42220)
UV lamp and UV safety gogglesPower supply:
DC 12V (Battery terminal)
For checking refrigerant leak when
fluorescent dye is installed in A/C
system
Includes:
UV lamp and UV safety goggles
(J-41447)
HFC-134a (R-134a) fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)Application: For HFC-134a (R-134a)
PA G o i l
Container: 1/4 ounce (7.4 cc) bottle
(Includes self-adhesive dye
identification labels for affixing to
vehicle after charging system with
dye.) Tool number
Tool nameDescription
RJIA0195E
SHA705EB
ZHA200H
SHA438F
SHA439F

ATC-18
PREPARATION
(J-41459)
HFC-134a (R-134a) dye injector
Use with J-41447, 1/4 ounce
bottleFor injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.
(J-43872)
Refrigerant dye cleanerFor cleaning dye spills.
Manifold gauge set (with hoses
and couplers)Identification:
lThe gauge face indicates HFC-134a
(R-134a).
Fitting size: Thread size
l1/2²-16 ACME
Service hoses
lHigh-pressure side hose
lLow-pressure side hose
lUtility hoseHose color:
lLow hose: Blue with black stripe
lHigh hose: Red with black stripe
lUtility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
l1/2²-16 ACME
Service couplers
lHigh-pressure side coupler
lLow-pressure side couplerHose fitting to service hose:
M14 x 1.5 fitting is optional or
permanently attached.
Refrigerant weight scaleFor measuring of refrigerant
Fitting size: Thread size
1/2²-16 ACME
Vacuum pump
(Including the isolator valve)Capacity:
lAir displacement: 4 CFM
lMicron rating: 20 microns
lOil capacity: 482 g (17 oz.)
Fitting size: Thread size
l1/2²-16 ACME Tool number
Tool nameDescription
SHA440F
SHA441F
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203

PREPARATION
ATC-19
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AT C
Commercial Service ToolsEJS006AV
Tool number
Tool nameDescription
(J-44614)
Clutch disk holding toolClutch disk holding tool
WHA230

ATC-20
REFRIGERATION SYSTEM
REFRIGERATION SYSTEM
PFP:KA990
Refrigerant CycleEJS006AW
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, when the A/C is switched ON, the compressor runs continuously, and the
evaporator pressure, and therefore, temperature is controlled by the V-6 variable displacement compressor to
prevent freeze up.
Refrigerant System ProtectionEJS006AX
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above or falls below the specifications, the refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM.
The ECM de-energizes the A/C relay to disengage the magnetic compressor clutch when pressure on the high
pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm
2, 398 psi), or below
about 120 kPa (1.22 kg/cm
2,17.4psi).

REFRIGERATION SYSTEM
ATC-21
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PRESSURE RELIEF VALVE
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 2,990 kPa (30.5 kg/
cm
2, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant
into the atmosphere.
MJIB0323E

ATC-22
REFRIGERATION SYSTEM
Components
EJS006AY
REFRIGERATION SYSTEM
MJIB0209E

REFRIGERATION SYSTEM
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1. Defroster nozzle 2. LH side demister duct 3. LH ventilator duct
4. RH side demister duct 5. RH ventilator duct 6. Center ventilation duct
7. Heater and cooling unit assembly 8. Floor connector duct grilles 9. Floor connector duct
10. Front floor duct 11. Rear floor duct

ATC-24
LUBRICANT
LUBRICANT
PFP:KLG00
Maintenance of Lubricant Quantity in CompressorEJS006AZ
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage has occurred. It is important to maintain
the specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
lLack of lubricant: May lead to a seized compressor
lExcessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
Name: NISSAN A/C System Lubricant Type S (DH-PS) or equivalent
Part number: KLH00-PAGS0
CHECKING AND ADJUSTING
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant return operation.
Start the engine and set the following conditions:
Test Condition
lEngine speed: Idling to 1,200 rpm
lA/C switch: On
lBlower speed: Max. position
lTemp. control: Optional [Set so that intake air temperature is 25°to 30°C(77°to 86°F)]
lIntake position: Recirculation ( )
lPerform lubricant return operation for about ten minutes
Adjust the lubricant quantity according to the following table.
Lubricant Adjusting Procedure for Components Replacement Except Compressor
After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of lubricant to be added:
l*1: If refrigerant leak is small, no addition of lubricant is needed.
Lubricant Adjustment Procedure for Compressor Replacement
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. Confirm refrigerant purity in supply tank using recovery/
recycling equipment and refrigerant identifier. If NG, refer toAT C - 4 , "
Contaminated Refrigerant".
3. Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identi-
fier. If NG, refer toAT C - 4 , "
Contaminated Refrigerant".
4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.
5. Drain the lubricant from the “old” (removed) compressor into a graduated container and recover the
amount of lubricant drained.
6. Drain the lubricant from the “new” compressor into a separate, clean container.
7. Measure an amount of new lubricant installed equal to amount drained from “old” compressor. Add this
lubricant to “new” compressor through the suction port opening.
Part replacedLubricant to be added to system
Remarks
Amount of lubricant
m(Impfloz)
Evaporator 75 (2.6) —
Condenser 75 (2.6) —
Liquid tank 5 (0.2) Add if compressor is not replaced.
In case of refrigerant leak30 (1.1) Large leak
— Small leak *1

LUBRICANT
ATC-25
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8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to “new” compressor through the suction port opening.
9. If the liquid tank also needs to be replaced, add an additional 5 m (0.2 Imp fl oz) of lubricant at this time.
Do not add this 5 m (0.2 Imp fl oz) of lubricant if only replacing the compressor.
RHA065DI

ATC-26
AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL
PFP:27500
DescriptionEJS006B0
The front air control provides automatic regulation of the vehicle's interior temperature. The system is based
on the driver's and passenger's selected “set temperature”, regardless of the outside temperature changes.
This is done by utilizing a microcomputer, also referred to as the front air control, which receives input signals
from the following six sensors:
lAmbient sensor
lIn-vehicle sensor
lIntake sensor
lOptical sensor (one sensor for driver and passenger side)
lPBR (Position Balanced Resistor).
lVehicle speed sensor
The front air control uses these signals (including the set temperature) to automatically control:
lOutlet air volume
lAir temperature
lAir distribution
The front air control is used to select:
lOutlet air volume
lAir temperature/distribution
OperationEJS006B1
AIR MIX DOORS CONTROL
The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload.
BLOWER SPEED CONTROL
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
When AUTO switch is pressed, the blower motor starts to gradually increase air flow volume (if required).
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
INTAKE DOOR CONTROL
The intake door is automatically controlled by the temperature setting, ambient temperature, in-vehicle tem-
perature, intake temperature, amount of sunload and the ON-OFF operation of the compressor.
MODE DOOR CONTROL
The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload.
DEFROSTER DOOR CONTROL
The defroster door is controlled by: Turning the defroster dial to front defroster.