Infiniti Q45. Manual — part 102
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Intake Sensor Circuit . . . . . . . . . . . .118
Multiplex Communication Circuit . . . . . . .. 120
CONTROLLER . . . . . . . . . . . . . ... 125
Removal and Installation of Multifunction Switch . 125
REMOVAL . . . . . . . . . . . . . . . 125
INSTALLATION . . . . . . . . . . . . . 125
Removal and Installation of Rear Control Switch . 125
REMOVAL . . . . . . . . . . . . . . . 125
INSTALLATION . . . . . . . . . . . . . 125
Removal and Installation of Rear Control Cancel
Switch . . . . . . . . . . . . . . . . ... 125
REMOVAL . . . . . . . . . . . . . . . 125
INSTALLATION . . . . . . . . . . . . . 125
AMBIENT SENSOR . . . . . . . . . . . . 126
Removal and Installation . . . . . . . . . .. 126
REMOVAL . . . . . . . . . . . . . . . 126
INSTALLATION . . . . . . . . . . . . . 126
IN-VEHICLE SENSOR . . . . . . . . . . . 127
Removal and Installation . . . . . . . . . .. 127
REMOVAL . . . . . . . . . . . . . . . 127
INSTALLATION . . . . . . . . . . . . . 127
SUNLOAD SENSOR . . . . . . . . . . . .. 128
Removal and Installation . . . . . . . . . .. 128
REMOVAL . . . . . . . . . . . . . . . 128
INSTALLATION . . . . . . . . . . . . . 128
INTAKE SENSOR . . . . . . . . . . . . ... 129
Removal and Installation . . . . . . . . . .. 129
REMOVAL . . . . . . . . . . . . . . . 129
INSTALLATION . . . . . . . . . . . . . 129
BLOWER UNIT . . . . . . . . . . . . . ... 130
Removal and Installation . . . . . . . . . .. 130
REMOVAL . . . . . . . . . . . . . . . 130
INSTALLATION . . . . . . . . . . . . . 130
Disassembly and Assembly . . . . . . . . . 131
BLOWER MOTOR . . . . . . . . . . . . .. 132
Removal and Installation . . . . . . . . . .. 132
REMOVAL . . . . . . . . . . . . . . . 132
INSTALLATION . . . . . . . . . . . . . 132
INTAKE DOOR MOTOR . . . . . . . . . . . 133
Removal and Installation . . . . . . . . . .. 133
REMOVAL . . . . . . . . . . . . . . . 133
INSTALLATION . . . . . . . . . . . . . 133
IN-CABIN MICROFILTER . . . . . . . . . ... 134
Removal and Installation . . . . . . . . . .. 134
HEATER & COOLING UNIT ASSEMBLY . . . ... 135
Removal and Installation . . . . . . . . . .. 135
REMOVAL . . . . . . . . . . . . . . . 135
INSTALLATION . . . . . . . . . . . . . 136
Disassembly and Assembly . . . . . . . . .. 137
HEATER CORE . . . . . . . . . . . . . ... 139
Removal and Installation . . . . . . . . . .. 139
REMOVAL . . . . . . . . . . . . . . . 139
INSTALLATION . . . . . . . . . . . . . 139
MODE DOOR MOTOR . . . . . . . . . . . 140
Removal and Installation . . . . . . . . . .. 140
REMOVAL . . . . . . . . . . . . . . . 140
INSTALLATION . . . . . . . . . . . . . 140
AIR MIX DOOR MOTOR . . . . . . . . . . . 141
Removal and Installation . . . . . . . . . .. 141
REMOVAL . . . . . . . . . . . . . . . 141
INSTALLATION . . . . . . . . . . . . . 141
REAR VENTILATOR DOOR MOTOR . . . . . . 142
Removal and Installation . . . . . . . . . .. 142
REMOVAL . . . . . . . . . . . . . . . 142
INSTALLATION . . . . . . . . . . . . . 142
DUCTS AND GRILLES . . . . . . . . . . ... 143
Removal and Installation . . . . . . . . . .. 143
REMOVAL . . . . . . . . . . . . . . . 143
INSTALLATION . . . . . . . . . . . . . 145
REFRIGERANT LINES . . . . . . . . . . ... 146
HFC-134a (R-134a) Service Procedure . . . ... 146
SETTING OF SERVICE TOOLS AND EQUIP-
MENT . . . . . . . . . . . . . . . . 146
Components . . . . . . . . . . . . . . . 148
Removal and Installation of Compressor . . . .. 149
REMOVAL . . . . . . . . . . . . . . . 149
INSTALLATION . . . . . . . . . . . . . 150
Removal and Installation of Compressor Clutch .. 150
REMOVAL . . . . . . . . . . . . . . . 150
INSTALLATION . . . . . . . . . . . . . 152
Removal and Installation of Low-Pressure Flexible
Hose and Pipe . . . . . . . . . . . . . .. 153
REMOVAL . . . . . . . . . . . . . . . 153
INSTALLATION . . . . . . . . . . . . . 154
Removal and Installation of High-Pressure Flexible
Hose . . . . . . . . . . . . . . . . . . 154
REMOVAL . . . . . . . . . . . . . . . 154
INSTALLATION . . . . . . . . . . . . . 155
Removal and Installation of High-Pressure Pipe .. 155
REMOVAL . . . . . . . . . . . . . . . 155
INSTALLATION . . . . . . . . . . . . . 156
Removal and Installation of Refrigerant Pressure
Sensor . . . . . . . . . . . . . . . . .. 156
REMOVAL . . . . . . . . . . . . . . . 156
INSTALLATION . . . . . . . . . . . . . 156
Removal and Installation of Condenser . . . . 157
REMOVAL . . . . . . . . . . . . . . . 157
INSTALLATION . . . . . . . . . . . . . 157
ATC-4
Removal and Installation of Liquid Tank . . . ... 158
REMOVAL . . . . . . . . . . . . . . . 158
INSTALLATION . . . . . . . . . . . . .. 158
Removal and Installation of Evaporator . . . . 159
REMOVAL . . . . . . . . . . . . . . . 159
INSTALLATION . . . . . . . . . . . . .. 159
Removal and Installation of Expansion Valve . ... 159
REMOVAL . . . . . . . . . . . . . . . 159
INSTALLATION . . . . . . . . . . . . .. 160
Dye Injection . . . . . . . . . . . . . . .161
Electronic Refrigerant Leak Detector . . . . . 162
PRECAUTIONS
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ATC
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NJS0007I
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)
NJS0007J
CAUTION:
●
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 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, never 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.
–
Never allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts.
Damage may result.
ATC-6
PRECAUTIONS
CONTAMINATED REFRIGERANT
If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, take appropriate steps
shown below:
●
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 service equipment and refrigerant
supply.
●
Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.
●
In case of repairing, recover the refrigerant using only dedicated equipment and containers. Never
recover contaminated refrigerant into the existing service equipment. If the facility does not have
dedicated recovery equipment, contact a local refrigerant product retailer for available service. This refrig-
erant 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.
General Refrigerant Precautions
NJS0007K
WARNING:
●
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 J-2210 [HFC-134a (R-134a) recycling equipment], or J-2209 [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.
●
Never 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.
●
Never store or heat refrigerant containers above 52
°
C (125
°
F).
●
Never 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.
●
Never 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.
●
Never pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition-
ing 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 refrigerant
manufacturers.
Precautions for Refrigerant Connection
NJS0007M
A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
●
Expansion valve to cooling unit
●
Refrigerant pressure sensor to condenser
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.
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