Nissan XTrail T30 2005 User Manual

AUTOMATIC AIR CONDITIONER

J AIR CONDITIONER

SECTION ATC

AUTOMATIC AIR CONDITIONER

CONTENTS

PRECAUTIONS .......................................................... 4

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TEN-

SIONER” .................................................................. 4

Precautions for Working with HFC-134a (R-134a) ..... 4

CONTAMINATED REFRIGERANT ....................... 5

General Refrigerant Precautions .............................. 5

Lubricant Precautions .............................................. 5

Precautions for Refrigerant Connection ................... 6

FEATURES OF NEW TYPE REFRIGERANT

CONNECTION ................................ ...................... 6

O-RING AND REFRIGERANT CONNECTION ..... 7

Precautions for Servicing Compressor ..................... 9

Precautions for Service Equipment .......................... 9

RECOVERY/RECYCLING EQUIPMENT .............. 9

ELECTRONIC LEAK DETECTOR ........................ 9

VACUUM PUMP ................................................... 9

MANIFOLD GAUGE SET ...................................... 9

SERVICE HOSES ............................................... 10

SERVICE COUPLERS ........................................ 10

REFRIGERANT WEIGHT SCALE ...................... 10

CHARGING CYLINDER ...................................... 10

Precautions for Leak Detection Dye ....................... 10

IDENTIFICATION .................................................11

IDENTIFICATION LABEL FOR VEHICLE ............11

Wiring Diagrams and Trouble Diagnosis .................11

PREPARATION ......................................................... 12

Special Service Tools ............................................. 12

HFC-134a (R-134a) Service T ools and Equipment ... 12

Commercial Service Tools ...................................... 15

REFRIGERATION SYSTEM ..................................... 16

Refrigerant Cycle ................................................... 16

REFRIGERANT FLOW ....................................... 16

FREEZE PROTECTION ..................................... 16

Refrigerant System Protection ............................... 16

REFRIGERANT PRESSURE SENSOR ............. 16

PRESSURE RELIEF VALVE ............................... 16

V-6 Variable Displacement Compressor ................. 17

GENERAL INFORMATION ................................. 17

DESCRIPTION ............................ ........................18

Component Layout ................................................. 21

LUBRICANT ................................ ................... ........... 22

Maintenance of Lubricant Quantity in Compressor ...22

LUBRICANT ........................................................ 22

LUBRICANT RETURN OPERATION ..................22

LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT

COMPRESSOR .................................................. 23

LUBRICANT ADJUSTING PROCEDURE FOR

COMPRESSOR REPLACEMENT ....................... 23

AIR CONDITIONER CONTROL ...............................25

Description of Air Conditioner LAN Control System ...25

System Construction ..............................................25

OPERATION ........................................................ 25

TRANSMISSION DATA AND TRANSMISSION

ORDER ............................................................... 26

AIR MIX DOOR CONTROL (AUTOMATIC TEM-

PERATURE CONTROL) .................... ...... ....... .... 27

FAN SPEED CONTROL ......................................27

INTAKE DOOR CONTROL ................................. 27

OUTLET DOOR CONTROL ................................ 27

MAGNET CLUTCH CONTROL ........................... 27

SELF-DIAGNOSTIC SYSTEM ............................27

Description of Control System ................................ 28

Control Operation ................................................... 29

MODE CONTROL DIAL ...................................... 29

TEMPERA TURE CONTROL DIAL (POTENTIO

TEMPERATURE CONTROL) ..............................29

FAN CONTROL DIAL ..........................................29

REAR WINDOW DEFOGGER SWITCH ............. 29

INTAKE SWITCH ................................................. 29

A/C SWITCH ....................................................... 29

Discharge Air Flow .................................................30

System Description .................................................31

SWITCHES AND THEIR CONTROL FUNCTION ...31

TROUBLE DIAGNOSIS ............................................32

How to Perform Trouble Diagnoses for Quick and

Accurate Repair ......................................................32

WORK FLOW ......................................................32

ATC

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ATC-1

SYMPTOM TABLE ..............................................32

Component Parts and Harness Connector Location ...33

ENGINE COMPARTMENT ........................... .......33

PASSENGER COMPARTMENT ............ ....... .......34

Schematic — A/C, A — .......................................... 35

Wiring Diagram — A/C, A — ..................................36

Auto Amp. Terminals and Reference V alue ............40

PIN CONNECTOR TERMINAL LAYOUT ............40

TERMINALS AND REFERENCE VALUE FOR

AUTO AMP. .........................................................40

Self-diagnosis Functio n .......................................... 42

DESCRIPTION ....................................................42

FUNCTION CONFIRMATION PROCEDURE ......44

AUXILIARY MECHANISM: TEMPERATURE

SETTING TRIMMER ...........................................48

AUXILIARY MEC HANISM: FOOT POSITION

SETTING TRIMMER ...........................................49

AUXILIARY MECHANISM: INLET PORT MEM-

ORY FUNCTION .................................................49

Operational Check ..................................................50

CHECKING BLOWER .........................................50

CHECKING DISCHARGE AIR ............................50

CHECKING INTAKE DOOR ................................50

CHECKING TEMPERATURE DECREASE .........51

CHECKING TEMPERATURE INCREASE ..........51

CHECKING A/C SWITCH ...................................51

Power Supply and Ground Circuit for Auto Amp. ...52

INSPECTION FLOW ...........................................52

COMPONENT DESCRIPTION ............................52

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM ...53

LAN System Circuit ................................................54

DIAGNOSTIC PROCEDURE FOR LAN CIR-

CUIT ....................................................................54

Mode Door Motor Circuit ........................................57

INSPECTION FLOW ...........................................57

SYSTEM DESCRIPTION ....................................58

COMPONENT DESCRIPTION ............................59

DIAGNOSTIC PROCEDURE FOR MODE

DOOR MOTOR ...................................................59

Air Mix Door Motor Circuit ......................................60

INSPECTION FLOW ...........................................60

SYSTEM DESCRIPTION ....................................61

COMPONENT DESCRIPTION ............................62

DIAGNOSTIC PROCEDURE FOR AIR MIX

DOOR MOTOR ...................................................62

Intake Door Motor Circuit ........................................63

INSPECTION FLOW ...........................................63

SYSTEM DESCRIPTION ....................................64

COMPONENT DESCRIPTION ............................65

DIAGNOSTIC PROCEDURE FOR INTAKE

DOOR MOTOR ...................................................65

Blower Motor Circuit ...............................................66

INSPECTION FLOW ...........................................66

SYSTEM DESCRIPTION ....................................67

COMPONENT DESCRIPTION ............................68

DIAGNOSTIC PROCEDURE FOR BLOWER

MOTOR ...............................................................68

COMPONENT INSPECTION ..............................71

Magnet Clutch Circuit .............................................72

INSPECTION FLOW ....... ....... ...... ....... ...... ...........72

SYSTEM DESCRIPTION .....................................73

DIAGNOSTIC PROCEDURE FOR MAGNET

CLUTCH ..............................................................73

COMPONENT INSPECTION ...............................77

Insufficient Cooling ..................................................78

INSPECTION FLOW ....... ....... ...... ....... ...... ...........78

PERFORMANCE TEST DIAGNOSIS ..................80

PERFORMANCE CHART ....................................82

TROUBLE DIAGNOSIS FOR UNUSU AL PRES-

SURE .............................. .....................................83

Insufficient Heating .................................................86

INSPECTION FLOW ....... ....... ...... ....... ...... ...........86

Noise ............................ ...........................................87

INSPECTION FLOW ....... ....... ...... ....... ...... ...........87

Self-diagnosis .........................................................88

INSPECTION FLOW ....... ....... ...... ....... ...... ...........88

Ambient Sensor Circuit ...........................................89

COMPONENT DESCRIPTION ............................89

AMBIENT TEMPERATURE INPUT PROCESS ...89 DIAGNOSTIC PROCEDURE FOR AMBIENT

SENSOR ......................... .....................................89

COMPONENT INSPECTION ...............................91

In-vehicle Sensor Circuit .........................................91

COMPONENT DESCRIPTION ............................91

DIAGNOSTIC PROCEDURE FOR IN-VEHICLE

SENSOR ......................... .....................................92

COMPONENT INSPECTION ...............................93

Sunload Sensor Circuit ...........................................94

COMPONENT DESCRIPTION ............................94

SUNLOAD INPUT PROCESS .............................94

DIAGNOSTIC PROCEDURE FOR SUNLOAD

SENSOR ......................... .....................................94

COMPONENT INSPECTION ...............................96

Intake Sensor Circuit ...............................................97

COMPONENT DESCRIPTION ............................97

DIAGNOSTIC PROCEDURE FOR INTAKE SEN-

SOR .....................................................................97

COMPONENT INSPECTION ...............................98

CONTROLLER ..........................................................99

Removal and Installation .........................................99

REMOVAL ........................................................ ....99

INSTALLATION ................................................ ....99

AMBIENT SENSOR ................................................100

Removal and Installation .......................................100

REMOVAL ........................................................ ..100

INSTALLATION ................................................ ..100

IN-VEHICLE SENSOR ............................................101

Removal and Installation .......................................101

REMOVAL ........................................................ ..101

INSTALLATION ................................................ ..101

SUNLOAD SENSOR ......................... ....... ...... ....... ..102

Removal and Installation .......................................102

REMOVAL ........................................................ ..102

INSTALLATION ................................................ ..102

INTAKE SENSOR .............................. ....... ...... ....... ..103

Removal and Installation .......................................103

REMOVAL ........................................................ ..103

INSTALLATION ................................................ ..103

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ATC-2

BLOWER UNIT ....................................................... 104

Removal and Installation ...................................... 104

REMOVAL ......................................................... 104

INSTALLATION ................................................. 104

Disassembly and Assembly ................................. 105

BLOWER MOTOR .................................................. 106

Removal and Installation ...................................... 106

REMOVAL ......................................................... 106

INSTALLATION ................................................. 106

INTAKE DOOR MOTOR ......................................... 107

Removal and Installation ...................................... 107

REMOVAL ......................................................... 107

INSTALLATION ................................................. 107

FAN CONTROL AMPLIFIER .................................. 108

Removal and Installation ...................................... 108

REMOVAL ......................................................... 108

INSTALLATION ................................................. 108

IN-CABIN MICROFILTER ....................................... 109

Removal and Installation ...................................... 109

FUNCTION ...................................... ............. ..... 109

REPLACEMENT TIMING .................................. 109

REPLACEMENT PROCEDURES ..................... 109

HEATER & COOLING UNIT ASSEMBLY ...............110

Removal and Installation .......................................110

REMOVAL ..........................................................110

INSTALLATION .................................................. 111

Disassembly and Assembly ..................................112

MODE DOOR MOTOR ............................................113

Removal and Installation .......................................113

REMOVAL ..........................................................113

INSTALLATION ..................................................113

AIR MIX DOOR MOTOR ..........................................114

Removal and Installation .......................................114

REMOVAL ..........................................................114

INSTALLATION ..................................................114

HEATER CORE ............................. ....... ...... .............115

Removal and Installation .......................................115

REMOVAL ..........................................................115

INSTALLATION ..................................................115

DUCTS AND GRILLES ...........................................116

Removal and Installation .......................................116

REMOVAL ..........................................................116

INSTALLATION ..................................................119

REFRIGERANT LINES ........................................... 120

HFC-134a (R-134a) Service Procedure ............... 120

SETTING OF SERVICE TOOLS AND EQUIP-

MENT .......................... ...................................... 120

Components ................................ ......................... 122

Removal and Installation of Compressor ..............122

REMOVAL .........................................................122

INSTALLATION .................................................123

Removal and Installation of Compressor Clutch ..124

REMOVAL .........................................................124

INSTALLATION .................................................126

Removal and Installation of Low-Pressure Flexible

Hose .....................................................................127

REMOVAL .........................................................127

INSTALLATION .................................................127

Removal and Installation of High-Pressure Flexible

Hose .....................................................................128

REMOVAL .........................................................128

INSTALLATION .................................................128

Removal and Installation of High-Pressure Pipe ..128

REMOVAL .........................................................128

INSTALLATION .................................................129

Removal and Installation of Condenser ................129

REMOVAL .........................................................129

INSTALLATION .................................................130

Removal and Installation of Liquid Tank ...............130

REMOVAL .........................................................130

INSTALLATION .................................................130

Removal and Installation of Refrigerant Pressure

Sensor ..................................................................131

REMOVAL .........................................................131

INSTALLATION .................................................131

Removal and Installation of Evaporator ................131

REMOVAL .........................................................131

INSTALLATION .................................................132

Removal and Installation of Expansion Valve .......132

REMOVAL .........................................................132

INSTALLATION .................................................132

Checking for Refrigerant Leaks ............................133

Checking System for Leaks Using the Fluorescent

Leak Detector .......................................................133

Dye Injection .........................................................133

Electronic Refrigerant Leak Detector ....................134

PRECAUTIONS FOR HANDLING LEAK

DETECTOR ........................... ............................134

CHECKING PROCEDURE ...............................135

SERVICE DATA AND SPECIFICATIONS (SDS) ....137

Compressor ................. .........................................137

Lubricant ............... ................................. ...............137

Refrigerant ......................... ...................................137

Engine Idling Speed ........................................... ..137

Belt Tension ..........................................................137

ATC

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ATC-3

PRECAUTIONS

PRECAUTIONS PFP:00001 Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT

BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front sea t belt , helps t o redu ce th e r isk or s everi ty of injury to th e driv er an d front passenge r for c ertain types of collision. Information necessary to ser vice the system safely is included in the SRS and SB section of this Service Manual.

WARNING:

● To avoid rendering the SRS inoperativ e, which cou ld increase the ris k of persona l injury or death

in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.

● Improper maintenance, in cluding incorrect removal a nd installation of the SRS, can lead to per-

sonal injury caused by unintentional activation of the system. For rem ova l of Sp iral Ca ble an d Ai r Bag Module, see the SRS section.

● Do not use electrical test equipme nt on any circuit related to the SRS unle ss instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnes ses or harness connectors .

AJS001OL

Precautions for Working with HFC-134a (R-134a) AJS001OI

WARNING:

● CFC-12 (R-12) refrigeran t and HFC -134a (R -1 34a) refrigeran t are not com patible. If the re frigerants

are mixed and compre ssor malfunction is likely to occur, refer to “CONTAMINATED REFRIGERANT” below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharging equipment and Refrigerant identifier.

● Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-13 4a (R-134a) compo-

nents. If lubricant other than that specified is used, compressor malfunction is likely to occur.

● The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-

lowing handling prec autions must be observed:

– When removing refrigerant com ponents from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

– When installing refrigerant comp onents to a vehicle, do not remove the ca ps (unseal) until jus t

before connecting the comp onents. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system.

– Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri-

cant. Without proper sealing, lubricant will become moisture saturated and should not be used.

– Avoid breathing A/C refrigerant and lubricant vap or or mist. Expo sure ma y irritate eyes, no se and

throat. Remove HFC- 134a (R-134a) fr om the A/C syste m, using cert ified service equipment meet ing require me nts of SA E J -22 10 [ HFC -1 34 a ( R- 134 a) re cy cl i ng e qu i pm ent ], or J -22 09 [H F C-13 4a (R 134a) recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming service. Additional he alth and safety informatio n may be obtained from refrigerant and lubricant manufacturers.

– Do not allow lubricant (Nissan A/ C System Oil Type S) to come in contact with styrofoam parts.

Damage may re sult.

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ATC-4

PRECAUTIONS

CONTAMINATED REFRIGERANT

If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

● Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant

into the atm osphere.

● Explain that rec overy of the c ontaminate d refrigerant could da mage your se rvice eq uipmen t and refriger-

ant supply.

● Suggest th e cu stom er retu rn th e ve hicle to t he locati on of p revio us s ervice whe re the con tamina tio n ma y

have occurred.

● If you choose to p erfor m th e rep ai r, re cover t he re fri geran t usi ng on ly dedicated equipment and contain-

ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility

does not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available service. 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.

● If the vehicle is wit hin the warr ant y perio d, th e air con dit ioner warran ty is void. Please cont ac t Nissa n Cus-

tomer Affairs for further assistance.

General Refrigerant Precauti on s AJS001JW

WARNING:

● Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the

refrigerant every time an air conditioning system is discharged.

● Always wear eye a nd hand protection (goggles and glove s) when working with any refrigerant or

air conditioning system.

● Do not store or heat refrigerant containers above 52°C (125°F).

● Do not heat a r e frige r an t c ontainer with an open flame; i f container warming is requ ired , place the

bottom of the container in a warm pail of water.

● Do not intentionally drop, puncture, or incinerate refrigerant containers.

● Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.

● Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent

suffocation.

● Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condi-

tioning systems with compressed air during re pair. Some mixtures of air and HF C-134a (R-134a) have been show n to be combusti ble at elevated pressu res. The se mixtu res, i f ignited, may ca use injury or property damage. Additional health and safety information may be obtained from refrigerant manufacturers.

ATC

Lubricant Precautions AJS001JX

● Use only specifie d lu brica nt f or th e HFC -13 4a (R- 134a ) A/C syst em and H FC-13 4a ( R-134a ) co mpon ent s.

If lubricant other than that specified is used, compressor malfunction is likely to occur.

● The specif ied HFC- 134 a (R-134 a) lubric ant ra pidl y abs orbs mo isture from t he atm osp here. The fo llow ing

handling prec autions must be observed:

– When removing re frige ran t comp onen ts from a veh icle , immed iat ely c ap (se al) t he co mpon ent to mini mize

the entry of moisture from th e atmosphere.

– When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just before con-

necting the componen ts. Connect a ll refrigera nt loop c omponents as quickly as possi ble to mi nimize th e entry of moisture into syste m.

– Only use the specified lubricant from a sealed container. Immediately reseal containers of lubricant. With-

out proper sealing, lubricant will become moisture satur ated and should not be used.

● Avoid breathing A/C refri gerant and lubr icant vapor or mis t. Exposure ma y irritate eyes, nose and throat.

Remove HFC-134a (R-134a) from the 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 equipment]. If accidental system discharge occurs, vent ilate work area before resuming service. Additional health and safety information may be obtain ed from refri gerant and lub ricant manufacturers.

● Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts. Damage

may result.

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ATC-5

PRECAUTIONS

Precautions for Refrigerant Connection AJS001JY

A new type refrigerant connection has been introduced to all refrigerant lines except the following location.

● Expansion valve to cooli ng unit

● Refrigerant pressure sensor to liquid tank

FEATURES OF NEW TYPE REFRIGERANT CONNECTION

● The O-ring has been relocated. It ha s also been prov id ed w i th a groove for prope r i ns talla tio n. Th is e limi-

nates the chance of the O-ring bei ng caught in, or da maged by, the mating part. The sealing dire ction of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing characteristics.

● The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facil-

itating piping connec tio ns .

SHA815E

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ATC-6

PRECAUTIONS

O-RING AND REFRIGERANT CONNECTION

RJIA3160E

CAUTION:

The new and former refrigeran t connections use different O-ring configuratio ns. Do not confuse Orings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or around, the connection.

O-Ring Part Numbers and Specifications

SHA814E

Connection type

New Former 92470 N8200 6.07 (0.2390) 1.78 (0.0701) Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701)

New Former 92475 71L00 11.0 (0.433) 2.4 (0.094)

New Former 92475 72L00 14.3 (0.563) 2.3 (0.091)

New Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701)

O-ring

size

Part number D mm (in) W mm (in)

92471 N8210 6.8 (0.268) 1.85 (0.0728)

92472 N8210 10.9 (0.429) 2.43 (0.0957)

92473 N8210 13.6 (0.535) 2.43 (0.0957)

92474 N8210 16.5 (0.650) 2.43 (0.0957)

ATC

WARNING:

Make sure 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:

When replacing or cleaning refrigerant cycle components, observe the following.

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ATC-7

PRECAUTIONS

● When the compressor is re moved, s tore it in the same pos ition as it i s when moun ted on the c ar.

Malfunction to do so will cause lubricant to enter the low-pressure chamber.

● When connect ing tubes, always use a torque wrench and a back-up wrench.

● After disconnecting tubes, immediately plug al l openings to prevent entry of dirt and moisture.

● When installing an air conditioner in the veh icl e, c onne ct the pip es as the final stage of the opera -

tion. Do not remove the seal ca ps of pipes and other components until just be fore 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.

● Thoroughly remove moisture from the refrigeration system before charging the refrigerant.

● Always replace used O-rings.

● When connecting tube, apply lubricant to circle of the O-rings shown in illustration. Be careful not

to apply lubricant to threaded portion.

Lubricant name : Nissan A/C System Oil Type S Part number : KLH00-PAGS0

● O-ring must be closely attached to dented portion of tube.

● When replacing the O-ring, be careful not to damage O-ring and tube.

● Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that

the O-ring is installed to tube correctly.

● After connecting l ine , c ond uct le ak te st a nd ma ke s u re tha t there is no leakage fr o m con nec tions.

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

RHA861F

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ATC-8

PRECAUTIONS

Precautions for Servicing Compressor AJS001JZ

● Plug all openings to prevent moisture and foreign matter from entering.

● When the compressor is removed, store it in the same position as it is when mounted on the car.

● When replacing or repairing compressor, follow “Maintenance of Lub ricant Quanti ty in Compres-

sor” exactly. Refer to ATC-22, "

● Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with lubri-

cant, wipe it off by using a clean waste cloth moistened with thinner.

● After compressor service operation, turn the compressor shaft by hand more than five turns in

both directions. This will equally distribute lu bric ant ins ide the c omp res sor. After the compressor is installed, let the engine idle and operate the compressor for one hour.

● After replacing the compressor magnet clutch, apply voltage to t he new one and chec k for usual

operation.

Maintenance of Lubricant Quantity in Compressor" .

Precautions for Service Equipment AJS001K0

RECOVERY/ RECYCLING EQUIPMENT

Be certain to follow t he manufacturer ’s instructions fo r machine operatio n and machine maintenance. N ever introduce any refrigerant other than that specified into the machine.

ELECTRONIC 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 va cuum pump is ex posed to atmos pheric 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, us e a ma nual val ve pla ced near the hose to-pump connection, as follows.

● Usually vac uum pumps have a manu al isolator valve as part of

the pump. Close th is valve to isolate the servic e hose from the pump.

● For pumps without an isolator , use a hose equipped with a man-

ual shut-off valve near the pump end. Close the valve to isolate the hose from the pump.

● If the hose has an automatic shut-off valve, disconnect the hose

from the pump. As long as the hose is connected, the valve is open and lubric ating oil may migrate.

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

ATC

RHA270DA

MANIFOLD GAUGE SET

Be certain that the g auge face indicates HFC-134a or R-134a. Be sure the gauge set has 1/2″-16 ACME threaded conn ec ti on s fo r se rvice hoses. Confirm the set has been used only with refrigerant HFC-134a (R-134a) and specified lubricants.

SHA533D

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ATC-9

PRECAUTIONS

SERVICE HOSES

Be certain that the service hoses display the markings described (colored hose with black stripe). All hoses must include positive shutoff 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 a CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will not properly connect to the CFC-12 (R-12) system. However, if an improper connection is attempted, discharging and contamination may occur.

Shut-off valve rotation A/C service valve

Clockwise Open

Counterclockwise Close

RHA272D

RHA273D

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFC-134a (R-134a) and specified lubricants have been used with the scale. If the scale controls refrigerant flow electronically, the hose fitting must be 1/2″-16 ACME.

RHA274D

CHARGING CYLINDER

Using a charging cylinder is not recomm ended. Refrigerant ma y be vented into air from cylinder’s top valve when filling th e cylinder with refriger ant. Also, the accuracy of the cylinder is generall y less than that of an electronic scale or of quality recycle/recharge equipment.

Precautions for Leak Detection Dye AJS001K1

● The A/C system cont ain s a fl uoresc ent leak det ect ion d ye use d for l ocat ing re frig eran t leak s. An ultr avio let

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

● Always wear fluorescence enhancing UV safet y goggles to prot ect your eyes and enhance the visibility of

the fluorescent dye.

● The fluoresc en t dye l eak d et e ct or i s no t a re pl ac eme nt f o r an el e ct ron ic ref r ige r an t l eak de te ct or. T he flu o-

rescent dye leak de tector sh ould be u sed in co njunct ion with an elect ronic refri gerant le ak detec tor to (J -

41995) pin-point refrigerant leaks.

● For your safety and your c usto mer’ s sat isfacti on , read and follo w all m anu factu re’ s op eratin g ins truct ions

and precautions prior to perform in g the work.

● A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal

should only be repaired after confirming the leak with an elect ronic refrigerant leak det ector (J-41995).

● Always remove any rema ining dye from the leak area aft er repairs are complete to avoid a misdiag nosis

during a future service.

Revision: 2005 March 2005 X-Trail

ATC-10

PRECAUTIONS

● Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled,

clean immedia tely w ith the ap prov ed dy e clea ner. Fl uor escen t dye l eft on a s urfa ce fo r an ex ten ded p eriod of time cannot be remo ve d.

● Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).

● Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system .

● Leak detectio n dyes for HFC-134a (R-134a ) and CFC-12 (R-12) A/C syst ems are different. Do not us e

HFC-134a (R-134a) leak dete ction 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 will remain for over three (3) years unless a compressor malfunction

occurs.

IDENTIFICATION

NOTE:

Vehicles with factory installed fluoresc ent 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 thi s id en tification label on the front side of hood.

SHA436FA

Wiring Diagrams and Trouble Diagnosis AJS001K2

When you read wiring diagrams, refer to the following:

● GI-14, "How to Read Wiring Diagrams" in GI section.

● PG-3, "Wiring Diagram - POWER -" in PG section.

When you perform trouble diagnosis, refer to the foll owing:

● GI-10, "How to Follow Trouble Diagnoses" in GI section.

● GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.

ATC

Revision: 2005 March 2005 X-Trail

ATC-11

PREPARATION

PREPARATION PFP:00002 Special Service Tools AJS001O3

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number (Kent-Moore No.) Tool name

Description

KV99106100 (J-41260) Clutch disc wrench

KV99232340 (J-38874) Clutch disc puller

KV99106200 (J-41261) Pulley installer

S-NT232

RJIA0194E

S-NT376

S-NT235

Removing shaft nut and clutch disc

Removing clutch disc

Installing pulley

HFC-134a (R-134a) Service Tools and Equipment AJS001O4

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 containe r fittings, service hose fitti ngs and service equipment fit tings (equipment which handle s 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. Adapters that conv ert one size fitting to anot her must never be used: refrig erant/lubricant contamin ation will occur and compressor malfunction will result.

Revision: 2005 March 2005 X-Trail

ATC-12

PREPARATION

Tool number (Kent-Moore No.) Tool name

HFC-134a (R-134a) refrigerant

KLH00-PAGS0 Nissan A/C System Oil Type S (DH-PS)

(ACR2005-NI) ACR5 A/C Service Center

Description

Container color: Light blue Container marking: HFC-134a (R134a) Fitting size: Thread size

● Large container 1/2

S-NT196

Type: Polyalkylene glycol oil (PAG), type S (DH-PS) Application: HFC-134a (R-134a) wobble (swash) plate compresso rs (Nissan only)

Lubricity: 40 m (1.4 Imp fl oz)

S-NT197

Function: Refrigerant recovery, recycling and recharging

WJIA0293E

″

-16 ACME

(J-41995) Electrical leak detector

(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 cleaner

(J-42220) UV lamp and UV safety goggles

SHA438F

AHA281A

ZHA200H

Power supply: DC 12V (Battery terminal)

Power 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

ATC

Revision: 2005 March 2005 X-Trail

ATC-13

Tool number (Kent-Moore No.) Tool name

(J-41447) HFC-134a (R-134a) fluorescent leak detection dye (Box of 24, 1/4 ounce bottles)

(J-41459) HFC-134a (R-134a) dye injector Use with J-41447, 1/4 ounce bottle

PREPARATION

Description

Application: For HFC-134a (R-134a) PAG oil Container: 1/4 ounce (7.4cc) bottle (Includes self-adhesive dye identification labels for affixing to vehicle after charging system with

SHA439F

SHA440F

dye.)

For injecting 1/4 ounce of fluorescent leak detection dye into A/C sys t em

(J-43872) Refrigerant dye cleaner

(J-39183) Manifold gauge set (with hoses and couplers)

Service hoses

● (J-39501-72)

High-pressure side hose

● (J-39502-72)

Low-pressure side hose

● (J-39476-72)

Utility hose

SHA441F

S-NT201

RJIA0196E

For cleaning dye spills

Identification:

● The gauge face indicates HFC-134a

(R-134a).

Fitting size: Thread size

″

● 1/2

-16 ACME

Hose color:

● Low hose : Blue with black stripe

● High hose: Red with black stripe

● Utility hose: Yellow with black stripe

or green with black stripe

Hose fitting to gauge:

″

● 1/2

-16 ACME

Service couplers

● (J-39500-20)

High-pressure side coupler

● (J-39500-24)

Hose fitting to service hose: M14 × 1.5 fitting is optional or permanently attached.

Low-pressure side coupler

S-NT202

Revision: 2005 March 2005 X-Trail

ATC-14

PREPARATION

Tool number (Kent-Moore No.) Tool name

(J-39650) Refrigerant weight scale

(J-39649) Vacuum pump (Including the isolator valve)

Description

For measuring of refrigerant Fitting size: Thread size

″

-16 ACME

1/2

S-NT200

Capacity:

● Air displacement: 4 CFM

● Micron rating: 20 microns

● Oil capacity: 482 g (17 oz)

Fitting size: Thread size

″

1/2

S-NT203

-16 ACME

Commercial Service Tools AJS001O5

Tool name Description

Refrigerant identifier equipment

RJIA0197E

Power tool For loosening bolts and nuts

PBIC0190E

Checking for refrigerant purity and sys tem contamination

ATC

Revision: 2005 March 2005 X-Trail

ATC-15

REFRIGERATION SYSTEM

REFRIGERATION SYSTEM PFP:KA990 Refrigerant Cycle AJS001K5

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 ope rating conditions, w hen the A/C is switched on, the compressor runs c ontinuously, and the evaporator pressure, and th erefore, temperature is controlled by th e V-6 variable displacement compressor to prevent freeze up.

Refrigerant System Protection AJS001K6

REFRIGERANT PRESSURE SENSOR

The refriger ant sy stem i s prot ect ed ag ains t exces sive ly hi gh - or l ow-p ressur es b y the r efri ger ant pr essu re sensor, located on the liquid tank. If the system pressure rises above, or falls below the specifications, the refrigerant pressure sens or detec ts the pressu re inside the refr igerant li ne and sen ds the vo ltage signa l to the ECM. ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side

detected by refr ige rant pressur e sen sor is over ab out 2,746 kP a (28 kg /cm (1.4 kg/cm

, 20 psi).

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 unusual level [more than 3,727 kPa (38 kg/cm

, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere.

, 398 psi), or below about 134 kPa

RJIA1552E

Revision: 2005 March 2005 X-Trail

ATC-16

REFRIGERATION SYSTEM

V-6 Variable Dis placement Compressor AJS001K7

GENERAL INFORMATION

1. The V-6 variable compressor differs from previous units. The vent temperatures of the V-6 variable compressor do not drop too far below 5°C (41°F) when: Evaporator intake air temperature is less than 20°C (68°F). Engine is running at speeds less than 1,500 rpm. This is because the V-6 compressor provides a means of “capacity” control.

2. The V-6 variab le co mpres sor pr ovid es refri geran t con trol un der va rying cond ition s. Durin g col d winte rs, it may not produce high refrigerant pressure discharge (compared to previous units) when used with air conditioning systems.

3. A “clanking” sound may occasionally be heard during refrigerant charge. The sound indicates that the tilt angle of the wobble (swash) plate has changed and is not a malfu nction.

4. For air c onditioning systems with the V-6 compressor, the clutch remain s engaged unless: the s ystem main switch, fa n switc h or ig nitio n swit ch is turn ed OFF. When ambient (outside) temper atures are lo w or when the amount of refrigerant is insufficient, the clutch is disengaged to protect the compressor.

5. A constant ra nge of s uction pressure i s maintain ed whe n engine speed i s grea ter than a certain valu e. It

normally ranges from 147 to 177 kPa (1.5 to 1.8 kg/cm In previous compressors, however, suction pressure was reduced with increases in engine speed.

, 21 to 26 psi) under varying conditions.

ATC

Revision: 2005 March 2005 X-Trail

ATC-17

REFRIGERATION SYSTEM

DESCRIPTION General

The variable co mpre ssor i s basi call y a swa sh pl ate typ e th at chan ges pi ston st ro ke in re spon se to th e re quire d cooling cap acity. The tilt of th e wobble (s wash) plat e allows t he pist on’s stroke to change so that refrig erant disc harge ca n be

continuously changed from 13.5 to 146 cm

(0.824 to 8.91 cu in).

SJIA0631E

Revision: 2005 March 2005 X-Trail

ATC-18

REFRIGERATION SYSTEM

Operation

1. Operation Cont rol Valve Operation contr o l val ve is lo ca te d in t he su ctio n p or t ( lo w -pr e ss ure ) s ide, an d o pens or cl os es in re sp on se to changes in refrigerant suction pressure. Operation of the valve controls the internal pressure of the crankcase. The angle of the wobble (swash) plate is controlled between the crankcase’s internal pressure and the piston cylinder pressure.

2. Maximu m C oo ling Refrigerant pressure on the low-pressure side increases with an increase in heat loads. When this occurs, the control valve’s bellows compress to open the low-pressure side valve and close the high-pressure side valve. This causes the following pressure changes:

● The crankcase’s int ernal pressure to equal the pressure on the low-pressure side;

● The cylinder’s internal pressure to be greater than the crankcase’s internal pressure.

Under this condition, the wobble (swash) plate is set to the maximum stroke position.

3. Capacity Control

● Refrigerant pressure on suction side is low during high speed driving or when ambient or interior tem-

perature is low.

● The bellows expands when refrigerant pressure on the suction pressure side drops below approxi

mately 177 kPa (1.8 kg/cm

, 26 psi).

Since suction pressure is low, it makes the suction port close and the discharge port open. Thus, crankcase pressure becomes high as high-pressure enters the crankcase.

● The force acts around the journal pin near the wobble (swash) plate, and is generated by the pressure

difference between before and behind the piston.

The drive lug and journal pin are located where t he piston gene rates the highest p ressure. Piston pressure is between suction pressure Ps and discharge pressure Pd, which is near suction pressure Ps. If crankcase pres sure Pc rises d ue to capacity con trol, the force around the journal pin m akes the wob ble (swash) plate angle decrease and also the piston stroke decrease. In other words, crankcase pressure increase triggers pressure difference between the piston and the crankcase. The pressure difference changes the angle of the wobble (swash) plate.

RHA473C

ATC

Revision: 2005 March 2005 X-Trail

ATC-19

REFRIGERATION SYSTEM

RHA474C

Revision: 2005 March 2005 X-Trail

ATC-20

REFRIGERATION SYSTEM

Component Layout AJS001K8

RJIA3092E

ATC

Revision: 2005 March 2005 X-Trail

ATC-21

LUBRICANT

LUBRICANT PFP:KLG00 Maintenance of Lubricant Quantity in Compressor AJS001K9

The lubricant in the c ompressor circulates thro ugh the syst em with the refrig erant. Add lubr icant to compre ssor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified amount. If lubricant quantity is not maintained properly, the following malfunctions may result:

● Lack of lubricant: May lead to a seized com pressor.

● Excessive lubricant: Inadequate cooling (thermal exchange interference)

LUBRICANT

Name : Nissan A/C System Oil Type S Part number : KLH00-PAGS0

LUBRICANT RETURN OPERATION

Adjust the lubricant quantity according to the test group shown below.

1. CHECK LUBRICANT RETURN OPERATION

Can lubricant return op era tio n be perfo rmed?

● A/C system works properly.

● There is no evidence of a large amount of lubricant leakage.

CAUTION:

If excessive lubricant leakage is noted, do not perform the lubricant return operat ion.

OK or NG

OK >> GO TO 2. NG >> GO TO 3.

2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS

1. Start engine, and set the following conditions:

– Engine speed: Idling to 1,200 rpm – A/C switch: ON – Blower speed: Max. pos iti on – Temp. control: Optional [Set so that intake air temperature is 25 to 30°C (77 to 86°F).] – Intake position: Recirculation (REC)

2. Perform lubricant return operation for about 10 minutes.

3. S top engine.

>> GO TO 3.

3. CHECK REPLACEMENT PART

Should the compressor be replaced?

YES >> GO TO ATC-23, "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-

MENT" .

NO >> GO TO ATC-23, "

MENT EXCEPT COMPRESSOR" .

LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-

Revision: 2005 March 2005 X-Trail

ATC-22

LUBRICANT

LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR

After replacing any of the foll ow in g ma jo r com po ne nts, add the co rrec t am ount of lubricant to the system. Amount of lubricant to be added

Lubricant to be added to system

Part replaced

Evaporator 75 (2.6) Condenser 35 (1.2) Liquid tank 10 (0.4) -

In case of refrigerant leak

*1: If refrigerant leak is small, no addition of lubricant is nee ded.

Amount of lubricant

m (Imp fl oz)

30 (1.1) Large leak

LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT

1. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharging equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.

2. Connect recovery/recycling recharging equipment to vehicle. Confirm refrigerant purity in supply tank using recovery / recy cl i ng rec ha r gi ng eq uip men t and re fr i ger an t id en tif ie r. If NG, refer to ATC-5, "

INATED REFRIGERANT" .

3. Confirm refr iger a nt p ur ity i n v eh ic le A/ C sy st em us ing r e co ver y/ rec ycl i ng r ec ha rgi ng eq uip men t an d re f rig erant identifier. If NG, refer to ATC-5, "

4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into the recovery/recyclin g equipment.

5. Drain the lub ric an t f ro m th e o l d (r e mov ed) co mpr ess or i n to a gra du ated co ntainer and r e co ver th e amoun t 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.

8. Measure an amou nt o f n ew l ub ric an t eq ua l to t h e a mount r e cover e d d uri ng di sc har gi ng. A d d thi s l u bri can t to new compressor thro ug h the suct io n po rt ope ni ng .

9. If the liquid tank also ne ed s to be repla ce d, add an oth er 5 m (0.2 Im p fl oz) of lubric a nt at this time. Do not add this 5 m (0.2 Imp fl oz) of lubrica n t only when replaces the compressor.

CONTAMINATED REFRIGERANT" .

Remarks

Small leak

CONTAM-

ATC

Revision: 2005 March 2005 X-Trail

ATC-23

LUBRICANT

SJIA0596E

Revision: 2005 March 2005 X-Trail

ATC-24

AIR CONDITIONER CONTROL

AIR CONDITIONER CONTROL PFP:27500

Description of Air Conditioner LAN Control System AJS001KA

The LAN (Local Area Network) system consists of auto amp., mode door motor, air mix door motor and intake door motor. A configuration of these components is shown in the diagr am below.

RJIA0480E

System Construction AJS001KB

A small network is construct ed betw een the a uto amp. , air mix d oor motor, mode door mot or and intake door motor. The auto amp. and motors are connected by data transmission lines and motor power supply lines. The LAN network is built throug h the ground circuits of each door motor. Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted through the data transmission lines connecting the auto amp. and each door motor. The following funct ions ar e co ntained in L CUs built into air m ix d oor m ot or, mode door mo tor an d in take do or motor.

● Address

● Motor opening angle signal

● Data transmission

● Motor stop and driv e deci si on

● Opening angle sensor (PBR function)

● Comparison

● Decision (Auto amp. indicated val ue and motor opening angle comparison)

ATC

RHA350H

OPERATION

The auto amp. receives data from each of the sensors. Th e auto amp. sends mode door, air mix door and intake door opening angle data to the mode door motor LCU, air mix door motor LCU and intake door motor LCU. The mode door motor, air mix door moto r and intak e do or m oto r rea d th ei r resp ec ti ve signals according to the address signa l. Ope ning an gle indi cation signals receiv ed from t he auto amp. an d each o f the mo tor posi tion sensors is compared by the LCUs in each motor with the existing decision and opening angles. Subsequently, HOT/COLD, DEF/VENT or FRESH/RECIRCULATION operation is selected. The new selection data is returned to the auto amp.

Revision: 2005 March 2005 X-Trail

ATC-25

AIR CONDITIONER CONTROL

RHA351H

TRANSMISSION DATA AND TRANSMISSION ORDER

Auto amp. data is transmitted consecutively to each of the door motors following the form shown in figure below.

Start:

Initial compulsory signal sent to each of the door motors.

Address:

Data sent from th e au to amp. is sele cted a ccordin g to d ata-based de cision s made by th e air m ix doo r motor, mode door motor and intake door motor. If the address es are iden tical , the o peni ng an gle d ata and e rror ch eck sig nals are rec eiv ed by the d oor mo tor LCUs. The LCUs then make the appropriate error decision. If the opening angle data is usual, door control begins. If an error exists, the received data is rejected and corrected data received. Finally, door control is based upon the corrected opening angle data.

Opening Angle:

Data that shows the indicated door opening angle of each door motor.

Error Check:

Procedure by wh ic h se nt and r ece iv ed data is checke d for err ors . Err or da ta is then compi le d. The er ro r che ck prevents corrupted data from being used by the air mix door motor, mode door motor and intake door motor. Error data can be related to the following symptoms.

● Malfunction electrical frequency

● Poor electrical connections

● Signal leak age from transmission lines

● Signal leve l fluctuation

Revision: 2005 March 2005 X-Trail

ATC-26

AIR CONDITIONER CONTROL

Stop Signal:

At the end of each trans missi on, a stop op era tion, in-oper ati on, or inte rnal malf unctio n mess age is deli vered to the auto amp. This completes one data transmission and control cycle.

RHA352H

AIR MIX DOOR CONTROL (AUTOMATIC TEMPERATURE CONTROL)

The air mix door is automatically controlled so that in-vehicle temperature is maintained at a predetermined value by the temperature sett ing, ambient temperature, in-vehicle temperature and amount of sunload.

FAN SPEED CONTROL

Blower speed i s aut om at ic all y co nt rol l ed by t he te mp er a tur e se tti n g, amb i en t t empe r at ure , in-v eh ic le temp er a ture, intake temperature, amount of sunload and air mix door position. With FAN control dial set to AUTO, the blower motor starts to gradually increase air flow volume. When engine coola nt temper ature is low, the blower moto r operatio n is dela yed to prev ent cool air from flowing.

INTAKE DOOR CONTROL

The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, in take temperature, amount of sunload and ON-OFF operation of the compressor.

OUTLET DOOR CONTROL

The outlet door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature and amount of sunload.

MAGNET CLUTCH CONTROL

The ECM controls compressor operation using input signals from the throttle position sensor, refrigerant pressure sensor and auto amp.

SELF-DIAGNOSTIC SYSTEM

The self-diagnostic system is built into the auto amp. to quickly locate the cause of symptoms.

ATC

Revision: 2005 March 2005 X-Trail

ATC-27

AIR CONDITIONER CONTROL

Description of Control Syste m AJS001KC

The control sy stem consists of input sensors, switches, the auto amp. (microcomput er) and outputs. The relationship of these components is shown in the diag ram below:

RJIA3093E

Revision: 2005 March 2005 X-Trail

ATC-28

AIR CONDITIONER CONTROL

Control Operation AJS001KD

SJIA0386E

MODE CONTROL DIAL

Controls the air discharge outlets. Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position. When shifting m ode control d ial to DEF under the following c onditions, com pressor is turned ON. (A/C LED ON)

● FAN: O N

● A/C: OFF

TEMPERATURE CONTROL DIAL (POTENTIO TEMPERA T URE CONTROL)

Increase or decrease the set temperature.

FAN CONTROL DIAL

Automatically or Manually control the blower speed. Twenty-five speeds are available for manual control. Shifting fan control dial to AUTO, compressor is turned ON automatically.

REAR WINDOW DEFOGGER SWITCH

When illumination is ON, rear window is defogged.

INTAKE SWITCH

● When intake switch is ON, FRE indicator turns ON, and air inlet is fixed to FRE.

● When press intake switch again, REC indicator turns ON, and air inlet is fixed t o REC.

● When intake switch is pressed for approximately 1.5 seconds or longer, REC and FRE indicators blink

twice. Then, automatic con trol mode is entered. Inlet status is displayed even during automatic control.

● When shifting mode control dial to D/F, D/F2 or DEF position, FRE indicator is turned ON, or when com-

pressor is turned from ON to OFF, REC switch is automatically turned OFF (fixed to FRE mode). REC mode can be re-entered by pressing intake switch again. (Except DEF position)

A/C SWITCH

The compressor is ON or OFF. (Pressing the A/C switch when the fan control dial is ON will turn off the A/C switch and compressor.)

ATC

Revision: 2005 March 2005 X-Trail

ATC-29

AIR CONDITIONER CONTROL

Discharge Air Flow AJS001KE

SJIA0441E

Revision: 2005 March 2005 X-Trail

ATC-30

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