Nissan Pathfinder (2006 year). Manual — part 42
ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
C
D
E
F
G
H
I
K
L
M
SECTION
A
B
ATC
2006 Pathfinder
PRECAUTIONS . . . . . . . . . . . . . . .. 5
Precautions for Servicing Compressor . . . . . 11
Precautions for Service Equipment . . . . . . .11
PREPARATION . . . . . . . . . . . . . . . 14
Special Service Tools . . . . . . . . . . . . 14
HFC-134a (R-134a) Service Tools and Equipment
Commercial Service Tools . . . . . . . . . .. 17
REFRIGERATION SYSTEM . . . . . . . . . . 18
Components . . . . . . . . . . . . . . ... 18
FRONT REFRIGERATION SYSTEM . . . . .. 18
REAR REFRIGERATION SYSTEM . . . . . 19
Refrigerant Cycle . . . . . . . . . . . . ... 20
REFRIGERANT FLOW . . . . . . . . . ... 20
FREEZE PROTECTION . . . . . . . . . . 20
Refrigerant System Protection . . . . . . . ... 21
REFRIGERANT PRESSURE SENSOR . . . . 21
PRESSURE RELIEF VALVE . . . . . . . ... 21
OIL . . . . . . . . . . . . . . . . . . . . 22
Maintenance of Oil Quantity in Compressor . . ... 22
OIL . . . . . . . . . . . . . . . . . ... 22
CHECKING AND ADJUSTING . . . . . . . 22
AIR CONDITIONER CONTROL . . . . . . . ... 25
Description . . . . . . . . . . . . . . . .. 25
Operation . . . . . . . . . . . . . . . . 25
Description of Control System . . . . . . . . 27
Control Operation . . . . . . . . . . . . ... 27
Discharge Air Flow . . . . . . . . . . . . . 30
FRONT . . . . . . . . . . . . . . . . 30
REAR . . . . . . . . . . . . . . . . .. 30
ATC-2
2006 Pathfinder
System Description (Rear) . . . . . . . . . . 32
SWITCHES AND THEIR CONTROL FUNCTION ... 32
CAN Communication System Description . . . .. 33
TROUBLE DIAGNOSIS . . . . . . . . . . . 34
CONSULT-II Function (BCM) . . . . . . . . .. 34
CONSULT-II BASIC OPERATION . . . . . ... 34
DATA MONITOR . . . . . . . . . . . . .. 35
How to Perform Trouble Diagnosis for Quick and
Accurate Repair . . . . . . . . . . . . . .. 36
WORK FLOW . . . . . . . . . . . . . .. 36
SYMPTOM TABLE . . . . . . . . . . . .. 36
Component Parts and Harness Connector Location ... 37
A/C System Self-diagnosis Function . . . . . .. 51
DESCRIPTION . . . . . . . . . . . . . 51
Operational Check (Front) . . . . . . . . . .. 53
Operational Check (Rear) . . . . . . . . . ... 55
Power Supply and Ground Circuit for Front Air Con-
trol . . . . . . . . . . . . . . . . . . ... 56
Mode Door Motor Circuit . . . . . . . . . . 59
Air Mix Door Motor Circuit . . . . . . . . . .. 63
Intake Door Motor Circuit . . . . . . . . . . 72
INSPECTION FLOW . . . . . . . . . . ... 72
Front Blower Motor Circuit . . . . . . . . . ..75
Rear Blower Motor Circuit . . . . . . . . . ...82
Rear Air Control Circuit . . . . . . . . . . ...93
Magnet Clutch Circuit . . . . . . . . . . . ..96
Insufficient Cooling . . . . . . . . . . . . 102
Insufficient Heating . . . . . . . . . . . ...109
INSPECTION FLOW . . . . . . . . . . ..109
Heater Pump Circuit . . . . . . . . . . . .. 110
Noise . . . . . . . . . . . . . . . . . . 113
INSPECTION FLOW . . . . . . . . . . .. 113
Self-diagnosis . . . . . . . . . . . . . ... 115
INSPECTION FLOW . . . . . . . . . . .. 115
Memory Function . . . . . . . . . . . . .. 116
INSPECTION FLOW . . . . . . . . . . .. 116
Ambient Sensor 1 Circuit . . . . . . . . . .. 117
In-vehicle Sensor Circuit . . . . . . . . . ...120
ATC-3
C
D
E
F
G
H
I
K
L
M
A
B
ATC
2006 Pathfinder
Intake Sensor Circuit . . . . . . . . . . . 125
CONTROL UNIT . . . . . . . . . . . . . . 127
Removal and Installation . . . . . . . . . .. 127
FRONT AIR CONTROL . . . . . . . . . 127
REAR AIR CONTROL . . . . . . . . . ... 127
AMBIENT SENSOR . . . . . . . . . . . . 128
Removal and Installation . . . . . . . . . .. 128
REMOVAL . . . . . . . . . . . . . . . 128
INSTALLATION . . . . . . . . . . . . . 128
IN-VEHICLE SENSOR . . . . . . . . . . . 129
Removal and Installation . . . . . . . . . .. 129
REMOVAL . . . . . . . . . . . . . . . 129
INSTALLATION . . . . . . . . . . . . . 129
OPTICAL SENSOR . . . . . . . . . . . . 130
Removal and Installation . . . . . . . . . .. 130
INTAKE SENSOR . . . . . . . . . . . . ... 131
Removal and Installation . . . . . . . . . .. 131
REMOVAL . . . . . . . . . . . . . . . 131
INSTALLATION . . . . . . . . . . . . . 131
BLOWER MOTOR . . . . . . . . . . . . .. 132
Components . . . . . . . . . . . . . . . 132
Removal and Installation . . . . . . . . . .. 132
FRONT BLOWER MOTOR . . . . . . . ... 132
REAR BLOWER MOTOR . . . . . . . . . 133
IN-CABIN MICROFILTER . . . . . . . . . ... 134
Removal and Installation . . . . . . . . . .. 134
HEATER & COOLING UNIT ASSEMBLY . . . .. 136
Components . . . . . . . . . . . . . . . 136
Removal and Installation . . . . . . . . . .. 137
HEATER CORE . . . . . . . . . . . . . .. 140
Components . . . . . . . . . . . . . . . 140
Removal and Installation . . . . . . . . . .. 141
FRONT HEATER CORE . . . . . . . . ... 141
REAR HEATER CORE . . . . . . . . . . 141
HEATER PUMP . . . . . . . . . . . . . .. 142
Removal and Installation . . . . . . . . . .. 142
REMOVAL . . . . . . . . . . . . . . . 142
INSTALLATION . . . . . . . . . . . . . 142
INTAKE DOOR MOTOR . . . . . . . . . . . 143
Removal and Installation . . . . . . . . . .. 143
REMOVAL . . . . . . . . . . . . . . . 143
INSTALLATION . . . . . . . . . . . . . 143
MODE DOOR MOTOR . . . . . . . . . . . 144
Removal and Installation . . . . . . . . . .. 144
REMOVAL . . . . . . . . . . . . . . . 144
INSTALLATION . . . . . . . . . . . . . 144
AIR MIX DOOR MOTOR . . . . . . . . . . . 145
Components . . . . . . . . . . . . . . . 145
Removal and Installation . . . . . . . . . .. 145
FRONT AIR MIX DOOR MOTOR (DRIVER) . . 145
FRONT AIR MIX DOOR MOTOR (PASSENGER)
REAR AIR MIX DOOR MOTOR . . . . . . 146
VARIABLE BLOWER CONTROL . . . . . . ... 147
Removal and Installation . . . . . . . . . .. 147
REMOVAL . . . . . . . . . . . . . . . 147
INSTALLATION . . . . . . . . . . . . . 147
REAR BLOWER MOTOR RESISTOR . . . . . 148
Removal and Installation . . . . . . . . . .. 148
REMOVAL . . . . . . . . . . . . . . . 148
INSTALLATION . . . . . . . . . . . . . 148
DUCTS AND GRILLES . . . . . . . . . . ... 149
Components . . . . . . . . . . . . . . . 149
Removal and Installation . . . . . . . . . .. 151
REFRIGERANT LINES . . . . . . . . . . ... 154
HFC-134a (R-134a) Service Procedure . . . ... 154
SETTING OF SERVICE TOOLS AND EQUIP-
MENT . . . . . . . . . . . . . . . . 154
Components . . . . . . . . . . . . . . . 156
Removal and Installation for Compressor . . . 158
REMOVAL . . . . . . . . . . . . . . . 158
INSTALLATION . . . . . . . . . . . . . 158
Removal and Installation for Compressor Clutch . 159
Removal and Installation for Front High-pressure
Flexible A/C Hose . . . . . . . . . . . . . 162
REMOVAL . . . . . . . . . . . . . . . 162
INSTALLATION . . . . . . . . . . . . . 162
Removal and Installation for Front High-pressure
A/C Pipe . . . . . . . . . . . . . . . ... 162
REMOVAL . . . . . . . . . . . . . . . 162
INSTALLATION . . . . . . . . . . . . . 162
Removal and Installation for Front Low-pressure
Flexible A/C Hose . . . . . . . . . . . . . 162
REMOVAL . . . . . . . . . . . . . . . 162
INSTALLATION . . . . . . . . . . . . . 162
Removal and Installation for Front Low-pressure A/
C Pipe . . . . . . . . . . . . . . . . ... 163
REMOVAL . . . . . . . . . . . . . . . 163
INSTALLATION . . . . . . . . . . . . . 163
ATC-4
2006 Pathfinder
Removal and Installation for Rear High- and Low-
pressure A/C Pipes . . . . . . . . . . . ... 163
REMOVAL . . . . . . . . . . . . . . . 163
INSTALLATION . . . . . . . . . . . . .. 163
Removal and Installation for Underfloor Rear High-
and Low-pressure A/C and Heater Core Pipes . 163
REMOVAL . . . . . . . . . . . . . . . 163
INSTALLATION . . . . . . . . . . . . .. 165
Removal and Installation for Refrigerant Pressure
Sensor . . . . . . . . . . . . . . . . .. 165
REMOVAL . . . . . . . . . . . . . . . 165
INSTALLATION . . . . . . . . . . . . .. 165
Removal and Installation for Condenser . . . ... 165
REMOVAL . . . . . . . . . . . . . . . 165
INSTALLATION . . . . . . . . . . . . .. 165
Removal and Installation for Front Evaporator . . 166
REMOVAL . . . . . . . . . . . . . . . 167
INSTALLATION . . . . . . . . . . . . .. 167
Removal and Installation for Rear Evaporator . .. 168
REMOVAL . . . . . . . . . . . . . . . 168
INSTALLATION . . . . . . . . . . . . .. 169
Removal and Installation for Front Expansion Valve .169
REMOVAL . . . . . . . . . . . . . . ..169
INSTALLATION . . . . . . . . . . . . ..169
Removal and Installation for Rear Expansion Valve .169
REMOVAL . . . . . . . . . . . . . . ..169
INSTALLATION . . . . . . . . . . . . ..169
SERVICE DATA AND SPECIFICATIONS (SDS) . 174
PRECAUTIONS
ATC-5
C
D
E
F
G
H
I
K
L
M
A
B
ATC
2006 Pathfinder
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EJS004O6
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
●
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
●
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Working with HFC-134a (R-134a)
EJS004O7
WARNING:
●
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer
ATC-5, "Contaminated Refrigerant"
. To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use refrigerant recov-
ery/recycling equipment and refrigerant identifier.
●
Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
If oil other than that specified is used, compressor failure is likely to occur.
●
The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
–
When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
–
When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possi-
ble to minimize the entry of moisture into system.
–
Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
–
Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting
requirements of SAE J2210 [HFC-134a (R-134a) recycling equipment], or SAE J2209 [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
oil manufacturers.
–
Do not allow the refrigerant oil to come in contact with styrofoam parts. Damage may result.
Contaminated Refrigerant
EJS004O8
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 atmosphere.
●
Explain that recovery of the contaminated refrigerant could damage your service equipment and refriger-
ant supply.
●
Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.
●
If you choose to perform the repair, recover the refrigerant using only dedicated equipment and contain-
ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility
ATC-6
PRECAUTIONS
2006 Pathfinder
does not have dedicated recovery equipment, you may contact a local refrigerant product retailer for avail-
able 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 within the warranty period, the air conditioner warranty is void. Please contact NISSAN
Customer Affairs for further assistance.
General Refrigerant Precautions
EJS004O9
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 and hand protection (goggles and gloves) 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 refrigerant container with an open flame; if container warming is required, 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 repair. Some mixtures of air and HFC-134a (R-134a)
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 refriger-
ant manufacturers.
Precautions for Leak Detection Dye
EJS004OA
●
The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet
(UV) lamp is required to illuminate the dye when inspecting for leaks.
●
Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of
the fluorescent dye.
●
The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (J-
41995).
●
For your safety and the customer's satisfaction, read and follow all manufacturer's operating instructions
and precautions prior to performing 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 electronic refrigerant leak detector (J-41995).
●
Always remove any remaining dye from the leak area after repairs are complete to avoid a misdiagnosis
during a future service.
●
Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled,
clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period
of time cannot be removed .
●
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 detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use
HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C systems or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C systems or A/C system damage may result.
●
The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure
occurs.
A/C Identification Label
EJS004OB
Vehicles with factory installed fluorescent dye have this identification label on the underside of hood.
Precautions for Refrigerant Connection
EJS004OC
A new type refrigerant connection has been introduced to all refrigerant lines except the following locations.
PRECAUTIONS
ATC-7
C
D
E
F
G
H
I
K
L
M
A
B
ATC
2006 Pathfinder
●
Expansion valve to cooling unit
●
Evaporator pipes to evaporator (inside cooling unit)
●
Refrigerant pressure sensor
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
●
The O-ring has been relocated. It has also been provided with a groove for proper installation. This
reduces the possibility of the O-ring being caught in, or damaged by, the mating part. The sealing direction
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 connections.
SHA815E
ATC-8
PRECAUTIONS
2006 Pathfinder
O-RING AND REFRIGERANT CONNECTION
Front A/C Compressor and Condenser
WJIA1399E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст