Nissan Murano Z50 (2003 year). Manual — part 2
ADJUSTABLE PEDAL SYSTEM
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KEY SWITCH AND CVT DEVICE CIRCUIT INSPECTION
1.
CHECK PEDAL ADJUSTING CONTROL UNIT INPUT SIGNAL
1.
Disconnect pedal adjusting control unit connector.
2.
Key is inserted in ignition key cylinder.
3.
Check voltage between pedal adjusting control unit connector
and ground.
OK or NG
OK
>> Key switch and CVT device circuit is OK.
NG
>> GO TO 2.
2.
CHECK FUSE
●
Check 10A fuse [No.21, located in fuse block (J/B)]
NOTE:
Refer to
AP-4, "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION"
OK or NG
OK
>> GO TO 3.
NG
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to
3, "POWER SUPPLY ROUTING CIRCUIT"
.
3.
CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect key switch connector and key lock solenoid connec-
tor.
3.
Check voltage between key switch and key lock solenoid con-
nector M28 terminal 3 (Y/R) and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between key switch and key
lock solenoid and fuse.
4.
CHECK KEY SWITCH
Check continuity between key switch and key lock solenoid (key
switch) as follows.
OK or NG
OK
>> GO TO 5.
NG
>> Replace key switch and key lock solenoid.
Connector
Terminal (Wire color)
Condition
Voltage (V) (Approx.)
(+)
(-)
M88
3 (L)
Ground
P-position
0
Other than P-position.
Battery voltage
PIIA7664E
3 (Y/R) - Ground
: Battery voltage.
PIIA3286E
Terminals
Condition
Continuity
3
4
Key is inserted in ignition key cylinder.
Yes
Key is removed from ignition key cylinder.
No
PIIA3044E
AP-12
ADJUSTABLE PEDAL SYSTEM
Revision; 2004 April
2003 Murano
5.
CHECK CVT DEVICE POWER SUPPLY CIRCUIT
1.
Disconnect CVT device connector.
2.
Connect key switch connector and key lock solenoid connector.
3.
Key is inserted in ignition key cylinder.
4.
Check voltage between CVT device connector M57 terminal 5
(B/R) and ground.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
CHECK CVT DEVICE HARNESS
1.
Key is removed from ignition key cylinder.
2.
Disconnect key switch connector and key lock solenoid connec-
tor.
3.
Check continuity between CVT device connector M57 terminal 5
(B/R) and key switch and key lock solenoid (key switch) connec-
tor M28 terminal 4 (B/R).
4.
Check continuity between CVT device connector M57 terminal 5
(B/R) and ground.
OK or NG
OK
>> Check the condition the harness and connector.
NG
>> Repair or replace harness between key switch and key lock solenoid and CVT device connector.
7.
CHECK CVT DEVICE
Check continuity between CVT device as follows.
OK or NG
OK
>> GO TO 8.
NG
>> Replace CVT device.
5 (Y/R) - Ground
: Battery voltage.
PIIA8451E
5 (B/R) - 4 (B/R)
: Continuity should exist.
5 (B/R) - Ground
: Continuity should not exist.
PIIA4565E
Terminals
Condition
Continuity
5
6
P-position.
Continuity should not exist.
Other than P-position.
Continuity should exist.
PIIA4566E
ADJUSTABLE PEDAL SYSTEM
AP-13
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8.
CHECK PEDAL ADJUSTING CONTROL UNIT HARNESS
1.
Disconnect pedal adjusting control unit connector.
2.
Check continuity between CVT device connector M57 terminal 6
(L) and pedal adjusting control unit connector M88 terminal 3(L).
3.
Check continuity between CVT device connector M57 terminal 6
(L) and ground.
OK or NG
OK
>> Check the condition of the harness and connector.
NG
>> Repair or replace harness between CVT device and pedal adjusting control unit.
6 (L) - 3 (L)
: Continuity should exist.
6 (L) - Ground
: Continuity should not exist.
PIIA8452E
AP-14
ADJUSTABLE PEDAL SYSTEM
Revision; 2004 April
2003 Murano
PEDAL ADJUSTING SWITCH POWER SUPPLY AND GROUND INSPECTION
1.
CHECK PEDAL ADJUSTING SWITCH POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect pedal adjusting switch connector.
3.
Check voltage between pedal adjusting switch connector B306
terminal 64 (GY) and ground.
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
CHECK PEDAL ADJUSTING SWITCH HARNESS
1.
Disconnect pedal adjusting control unit connector.
2.
Check continuity between pedal adjusting control unit connector
M88 terminal 7 (R) and pedal adjusting switch connector B306
terminal 64 (GY).
3.
Check continuity between pedal adjusting control unit connector
M88 terminal 7 (R) and ground.
OK or NG
OK
>> Check the condition of the harness and connector.
NG
>> Repair or replace harness between pedal adjusting control unit and pedal adjusting switch.
3.
CHECK PEDAL ADJUSTING SWITCH GROUND CIRCUIT INSPECTION
Check continuity pedal adjusting switch connector B306 terminal
48C (B) and ground.
OK or NG
OK
>> Pedal adjusting switch power supply and ground circuit
is OK.
NG
>> Repair or replace the harness between pedal adjusting
switch and ground.
64 (GY) - Ground
: Battery voltage.
PIIA7666E
7 (R) - 64 (GY)
: Continuity should exist.
7 (R) - Ground
: Continuity should not exist.
PIIA7667E
48C (B) - Ground
: Continuity should exist.
PIIA7668E
ADJUSTABLE PEDAL SYSTEM
AP-15
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PEDAL ADJUSTING MOTOR CIRCUIT INSPECTION
1.
CHECK PEDAL ADJUSTING SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect pedal adjusting switch connector.
3.
Check continuity between pedal adjusting switch as follows.
OK or NG
OK
>> GO TO 2.
NG
>> Replace pedal adjusting switch.
2.
CHECK PEDAL ADJUSTING MOTOR HARNESS
1.
Disconnect pedal adjusting motor connector.
2.
Check continuity between pedal adjusting switch connector
B306 terminal 15 (G/W), 30 (L/W) and pedal adjusting motor
connector E113 terminal 1 (L/Y), 2 (L/R).
3.
Check continuity between pedal adjusting switch connector
B306 terminal 15 (G/W), 30 (L/W) and ground.
OK or NG
OK
>> Replace pedal adjusting motor.
NG
>> Repair or replace harness between pedal adjusting switch and pedal adjusting motor.
Terminals
Condition
Continuity
30
64
pedal adjusting switch forward.
Continuity should exist.
pedal adjusting switch neutral.
Continuity should not exist.
48C
pedal adjusting switch backward.
Continuity should exist.
pedal adjusting switch neutral.
Continuity should not exist
15
64
pedal adjusting switch backward.
Continuity should exist.
pedal adjusting switch neutral.
Continuity should not exist.
48C
pedal adjusting switch forward.
Continuity should exist.
pedal adjusting switch neutral.
Continuity should not exist.
PIIA7669E
15 (G/W) - 1 (L/Y)
: Continuity should exist.
30 (L/W) - 2 (L/R)
: Continuity should exist.
15 (G/W) - Ground
: Continuity should not exist.
30 (L/W) - Ground
: Continuity should not exist.
PIIA7670E
AP-16
ADJUSTABLE PEDAL SYSTEM
Revision; 2004 April
2003 Murano
CVT DEVICE CIRCUIT INSPECTION
1.
CHECK CVT DEVICE
1.
Disconnect CVT device connector.
2.
Check continuity between CVT device as follows.
OK or NG
OK
>> GO TO 2.
NG
>> Replace CVT device.
2.
CHECK PEDAL ADJUSTING CONTROL UNIT HARNESS
1.
Disconnect pedal adjusting control unit connector.
2.
Connect key switch connector and key lock solenoid connector.
3.
Check voltage between CVT device connector M57 terminal 6
(L) and ground.
OK or NG
OK
>> Replace pedal adjusting control unit.
NG
>> Repair or replace harness between CVT device and
pedal adjusting control unit.
Terminals
Condition
Continuity
5
6
P-position.
Continuity should not exist.
Other than P-position.
Continuity should exist.
PIIA4566E
6 (L) - Ground
: Continuity should not exist.
PIIA7671E
ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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ATC
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ATC
Revision; 2004 April
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AUTOMATIC AIR CONDITIONER
PRECAUTIONS . . . . . . . . . . . . . . .. 5
CONTAMINATED REFRIGERANT . . . . . ... 6
Precautions for Servicing Compressor . . . . ... 13
Precautions for Service Equipment . . . . . . 13
Precautions for Leak Detection Dye . . . . . ... 15
IDENTIFICATION . . . . . . . . . . . . 15
IDENTIFICATION LABEL FOR VEHICLE . . ... 15
Wiring Diagrams and Trouble Diagnosis . . . . 15
PREPARATION . . . . . . . . . . . . . . . 16
Special Service Tools . . . . . . . . . . . . 16
HFC-134a (R-134a) Service Tools and Equipment
Commercial Service Tools . . . . . . . . . .. 19
REFRIGERATION SYSTEM . . . . . . . . . . 20
Refrigerant Cycle . . . . . . . . . . . . ... 20
REFRIGERANT FLOW . . . . . . . . . ... 20
FREEZE PROTECTION . . . . . . . . . . 20
Refrigerant System Protection . . . . . . . ... 20
REFRIGERANT PRESSURE SENSOR . . . . 20
PRESSURE RELIEF VALVE . . . . . . . ... 20
Component Layout . . . . . . . . . . . . . 21
LUBRICANT . . . . . . . . . . . . . . . .. 22
Maintenance of Lubricant Quantity in Compressor ... 22
AIR CONDITIONER CONTROL . . . . . . . ... 25
Description of Control System . . . . . . . . 28
Control Operation . . . . . . . . . . . . ... 28
ATC-2
Revision; 2004 April
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CONTROL SYSTEM) . . . . . . . . . . .. 29
SWITCHES AND THEIR CONTROL FUNCTION ... 32
CAN Communication System Description . . . .. 33
CAN Communication Unit For 2WD Models . . ... 33
CAN Communication Unit For AWD Models . . .. 44
TROUBLE DIAGNOSIS . . . . . . . . . . . 55
CONSULT-II . . . . . . . . . . . . . . . 55
CONSULT-II BASIC OPERATION . . . . . ... 55
DATA MONITOR . . . . . . . . . . . . .. 56
How to Perform Trouble Diagnosis for Quick and
Accurate Repair . . . . . . . . . . . . . .. 57
WORK FLOW . . . . . . . . . . . . . .. 57
SYMPTOM TABLE . . . . . . . . . . . .. 57
Component Parts and Harness Connector Location ... 58
ENGINE COMPARTMENT . . . . . . . . .. 58
PASSENGER COMPARTMENT . . . . . . .. 59
Self-diagnosis Function . . . . . . . . . . .. 68
Operational Check . . . . . . . . . . . . .. 76
Power Supply and Ground Circuit for Auto Amp. ... 78
LAN System Circuit . . . . . . . . . . . . 81
DIAGNOSTIC PROCEDURE FOR LAN CIR-
CUIT . . . . . . . . . . . . . . . . . 81
Mode Door Motor Circuit . . . . . . . . . . 84
Air Mix Door Motor Circuit . . . . . . . . . ...87
Air Mix Door Motor PBR Circuit . . . . . . . ..89
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR PBR . . . . . . . . . . . . . . ..89
Intake Door Motor Circuit . . . . . . . . . . 90
Blower Motor Circuit . . . . . . . . . . . . 93
Magnet Clutch Circuit . . . . . . . . . . . ..98
Insufficient Cooling . . . . . . . . . . . . 104
Insufficient Heating . . . . . . . . . . . ... 111
INSPECTION FLOW . . . . . . . . . . .. 111
Noise . . . . . . . . . . . . . . . . . . 112
INSPECTION FLOW . . . . . . . . . . .. 112
Self-diagnosis . . . . . . . . . . . . . ... 113
INSPECTION FLOW . . . . . . . . . . .. 113
Memory Function . . . . . . . . . . . . .. 114
INSPECTION FLOW . . . . . . . . . . .. 114
Ambient Sensor Circuit . . . . . . . . . . . 115
ATC-3
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Intake Sensor Circuit . . . . . . . . . . . 124
CONTROLLER . . . . . . . . . . . . . ... 126
Removal and Installation of A/C and AV Switch ... 126
REMOVAL . . . . . . . . . . . . . . . 126
INSTALLATION . . . . . . . . . . . . . 126
AUTO AMP . . . . . . . . . . . . . . . . 127
Removal and Installation of Unified Meter and A/C
Amp. . . . . . . . . . . . . . . . . . . 127
REMOVAL . . . . . . . . . . . . . . . 127
INSTALLATION . . . . . . . . . . . . . 127
AMBIENT SENSOR . . . . . . . . . . . . 128
Removal and Installation . . . . . . . . . .. 128
REMOVAL . . . . . . . . . . . . . . . 128
INSTALLATION . . . . . . . . . . . . . 128
IN-VEHICLE SENSOR . . . . . . . . . . . 129
Removal and Installation . . . . . . . . . .. 129
REMOVAL . . . . . . . . . . . . . . . 129
INSTALLATION . . . . . . . . . . . . . 129
SUNLOAD SENSOR . . . . . . . . . . . .. 130
Removal and Installation . . . . . . . . . .. 130
REMOVAL . . . . . . . . . . . . . . . 130
INSTALLATION . . . . . . . . . . . . . 130
INTAKE SENSOR . . . . . . . . . . . . ... 131
Removal and Installation . . . . . . . . . .. 131
REMOVAL . . . . . . . . . . . . . . . 131
INSTALLATION . . . . . . . . . . . . . 132
BLOWER UNIT . . . . . . . . . . . . . ... 133
Removal and Installation . . . . . . . . . .. 133
REMOVAL . . . . . . . . . . . . . . . 133
INSTALLATION . . . . . . . . . . . . . 133
Disassembly and Assembly . . . . . . . . . 134
BLOWER MOTOR . . . . . . . . . . . . .. 135
Removal and Installation . . . . . . . . . .. 135
REMOVAL . . . . . . . . . . . . . . . 135
INSTALLATION . . . . . . . . . . . . . 135
INTAKE DOOR MOTOR . . . . . . . . . . . 136
Removal and Installation . . . . . . . . . .. 136
REMOVAL . . . . . . . . . . . . . . . 136
INSTALLATION . . . . . . . . . . . . . 136
IN-CABIN MICROFILTER . . . . . . . . . ... 137
Removal and Installation . . . . . . . . . .. 137
HEATER & COOLING UNIT ASSEMBLY . . . .. 138
Removal and Installation . . . . . . . . . .. 138
REMOVAL . . . . . . . . . . . . . . . 138
INSTALLATION . . . . . . . . . . . . . 139
Disassembly and Assembly . . . . . . . . . 140
MODE DOOR MOTOR . . . . . . . . . . . 142
Removal and Installation . . . . . . . . . .. 142
REMOVAL . . . . . . . . . . . . . . . 142
INSTALLATION . . . . . . . . . . . . . 142
AIR MIX DOOR MOTOR . . . . . . . . . . . 143
Removal and Installation . . . . . . . . . .. 143
REMOVAL . . . . . . . . . . . . . . . 143
INSTALLATION . . . . . . . . . . . . . 143
HEATER CORE . . . . . . . . . . . . . ... 144
Removal and Installation . . . . . . . . . .. 144
REMOVAL . . . . . . . . . . . . . . . 144
INSTALLATION . . . . . . . . . . . . . 144
DUCTS AND GRILLES . . . . . . . . . . ... 145
Removal and Installation . . . . . . . . . .. 145
REMOVAL . . . . . . . . . . . . . . . 145
INSTALLATION . . . . . . . . . . . . . 148
REFRIGERANT LINES . . . . . . . . . . ... 149
HFC-134a (R-134a) Service Procedure . . . ... 149
SETTING OF SERVICE TOOLS AND EQUIP-
MENT . . . . . . . . . . . . . . . . 149
Components . . . . . . . . . . . . . . . 151
Removal and Installation of Compressor . . . .. 152
REMOVAL . . . . . . . . . . . . . . . 152
INSTALLATION . . . . . . . . . . . . . 153
Removal and Installation of Compressor Clutch .. 153
REMOVAL . . . . . . . . . . . . . . . 153
INSTALLATION . . . . . . . . . . . . . 155
Removal and Installation of Low-pressure Flexible
Hose . . . . . . . . . . . . . . . . . . 156
REMOVAL . . . . . . . . . . . . . . . 156
INSTALLATION . . . . . . . . . . . . . 156
Removal and Installation of High-pressure Flexible
Hose . . . . . . . . . . . . . . . . . . 157
REMOVAL . . . . . . . . . . . . . . . 157
INSTALLATION . . . . . . . . . . . . . 157
Removal and Installation of Low-pressure Pipe 1
(Engine Compartment) . . . . . . . . . . . 158
REMOVAL . . . . . . . . . . . . . . . 158
INSTALLATION . . . . . . . . . . . . . 158
Removal and Installation of High-pressure Pipe 1
(Engine Compartment) . . . . . . . . . . . 159
REMOVAL . . . . . . . . . . . . . . . 159
INSTALLATION . . . . . . . . . . . . . 160
Removal and Installation of Low-pressure Pipe 2
and High-pressure Pipe 2 . . . . . . . . . . 160
REMOVAL . . . . . . . . . . . . . . . 160
INSTALLATION . . . . . . . . . . . . . 161
Removal and Installation of Liquid Tank . . . ... 162
REMOVAL . . . . . . . . . . . . . . . 162
INSTALLATION . . . . . . . . . . . . . 162
Removal and Installation of Condenser . . . . 163
REMOVAL . . . . . . . . . . . . . . . 163
INSTALLATION . . . . . . . . . . . . . 163
Removal and Installation of Refrigerant Pressure
Sensor . . . . . . . . . . . . . . . . .. 164
REMOVAL . . . . . . . . . . . . . . . 164
INSTALLATION . . . . . . . . . . . . . 164
ATC-4
Revision; 2004 April
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INSTALLATION . . . . . . . . . . . . .. 165
Removal and Installation of Expansion Valve . ... 165
REMOVAL . . . . . . . . . . . . . . . 165
INSTALLATION . . . . . . . . . . . . .. 165
DETECTOR . . . . . . . . . . . . . ...167
CHECKING PROCEDURE . . . . . . . . 168
PRECAUTIONS
ATC-5
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PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
AJS001BL
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.
ATC-6
PRECAUTIONS
Revision; 2004 April
2003 Murano
Precautions for Working with HFC-134a (R-134a)
AJS000Y8
WARNING:
●
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed and compressor malfunction is likely to occur, refer to “CONTAMINATED REFRIGER-
ANT” below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use
Refrigerant Recovery/Recycling Recharging equipment (ACR4) (J-39500-INF) and Refrigerant
Identifier.
●
Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (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 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 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 vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) from the A/C system, using certified service equipment meet-
ing requirements of SAE J2210 HFC-134a (R-134a) recycling equipment, or 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
lubricant manufacturers.
–
Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts.
Damage may result.
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 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
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 Cus-
tomer Affairs for further assistance.
PRECAUTIONS
ATC-7
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General Refrigerant Precautions
AJS000Y9
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.
Lubricant Precautions
AJS000YA
●
Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
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 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 con-
necting the components. 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 lubricant. With-
out proper sealing, lubricant will become moisture saturated and should not be used.
●
Avoid breathing A/C refrigerant and lubricant 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 require-
ments of SAE J2210 HFC-134a (R-134a) recycling equipment, or 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 lubricant manufacturers.
●
Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts. Damage
may result.
ATC-8
PRECAUTIONS
Revision; 2004 April
2003 Murano
Precautions for Refrigerant Connection
AJS000YB
A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
●
Expansion valve to evaporator
●
Refrigerant pressure sensor to condenser
ABOUT ONE-TOUCH JOINT
Description
●
One-touch joints are pipe joints which do not require tools during piping connection.
●
Unlike conventional connection methods using union nuts and flanges, controlling tightening torque at
connection point is not necessary.
●
When removing a pipe joint, use a disconnector.
COMPONENT PARTS
FUNCTIONS OF COMPONENT PARTS
NOTE:
●
Garter spring cannot be removed from cage of male-side piping.
●
Indicator ring remains near piping connection point, however, this is not a malfunction. (This is to check
piping connection during factory assembly.)
RJIA0970E
Pipe (Male side)
●
Retains O-rings.
●
Retains garter spring in cage.
Garter spring
Anchors female side piping.
Indicator ring
When connection is made properly, this is ejected from male-side piping. (This part is no longer neces-
sary after connection.)
O-ring
Seals connection point. (Not reusable)
Pipe (Female side)
●
Seals connection by compressing O-rings.
●
Anchors piping connection using flare and garter spring.
PRECAUTIONS
ATC-9
C
D
E
F
G
H
I
K
L
M
A
B
ATC
Revision; 2004 April
2003 Murano
REMOVAL
1.
Clean piping connection point, and set a disconnector.
2.
Slide disconnector in axial direction of piping, and stretch garter spring with tapered point of disconnector.
3.
Slide disconnector farther so that inside diameter of garter spring becomes larger than outside diameter of
female-side piping flare. Then male-side piping can be disconnected.
INSTALLATION
1.
Clean piping connection points, and insert male-side piping into female-side piping.
2.
Push inserted male-side piping harder so that female-side piping flare stretches garter spring.
3.
If inside diameter of garter spring becomes larger than outside diameter of female-side piping flare, garter
spring seats on flare. Then, it fits in between male-side piping cage and female-side piping flare to anchor
piping connection point.
NOTICE:
When garter spring seats on flare, and fits in between male-side piping cage and female-side piping flare,
it clicks.
CAUTION:
●
Female-side piping connection point is thin. So, when inserting male-side piping, take care not
to deform female-side piping. Slowly insert it in axial direction.
●
Insert piping securely until a click is heard.
SJIA0106E
SJIA0107E
ATC-10
PRECAUTIONS
Revision; 2004 April
2003 Murano
●
After piping connection is completed, pull male-side piping by hand to make sure connection
does not come loose.
NOTE:
One-touch joint connection is used in points below.
●
Low-pressure pipe 1 to low-pressure pipe 2 (O-ring size: 16)
●
High-pressure pipe 1 to high-pressure pipe 2 (O-ring size: 8)
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
●
The O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi-
nates the chance 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
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