window NISSAN 350Z 2007 Z33 Automatic Air Conditioner Workshop Manual

ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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Revision: 2006 November2007 350Z
AUTOMATIC AIR CONDITIONER
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Battery Service ................................ 4
Precautions for Procedures without Cowl Top Cover ..... 4
Precautions for Working with HFC-134a (R-134a) ..... 5
CONTAMINATED REFRIGERANT ....................... 5
General Refrigerant Precautions .............................. 6
Precautions for Refrigerant Connection ................... 7
ABOUT ONE-TOUCH JOINT ................................ 7
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 9
O-RING AND REFRIGERANT CONNECTION ... 10
Precautions for Servicing Compressor ................... 12
Precautions for Service Equipment ........................ 12
RECOVERY/RECYCLING EQUIPMENT ............ 12
ELECTRICAL LEAK DETECTOR ....................... 12
VACUUM PUMP ................................................. 12
MANIFOLD GAUGE SET .................................... 12
SERVICE HOSES ............................................... 13
SERVICE COUPLERS ........................................ 13
REFRIGERANT WEIGHT SCALE ...................... 13
CHARGING CYLINDER ...................................... 13
Precautions for Leak Detection Dye ....................... 14
IDENTIFICATION ................................................ 14
IDENTIFICATION LABEL FOR VEHICLE ........... 14
PREPARATION ......................................................... 15
Special Service Tools ............................................. 15
HFC-134a (R-134a) Service Tools and Equipment ... 16
Commercial Service Tools ...................................... 18
REFRIGERATION SYSTEM ..................................... 19
Refrigerant Cycle ................................................... 19
REFRIGERANT FLOW ....................................... 19
FREEZE PROTECTION ..................................... 19
Refrigerant System Protection ............................... 19
REFRIGERANT PRESSURE SENSOR ............. 19
PRESSURE RELIEF VALVE ............................... 19
Component Layout ................................................. 20LUBRICANT .............................................................. 21
Maintenance of Lubricant Quantity in Compressor ... 21
LUBRICANT ........................................................ 21
LUBRICANT RETURN OPERATION .................. 21
LUBRICANT ADJUSTING PROCEDURE FOR
COMPONENTS REPLACEMENT EXCEPT
COMPRESSOR .................................................. 22
LUBRICANT ADJUSTING PROCEDURE FOR
COMPRESSOR REPLACEMENT ....................... 23
AIR CONDITIONER CONTROL ............................... 24
Description of Air Conditioner LAN Control System ... 24
System Construction .............................................. 24
OPERATION ........................................................ 25
TRANSMISSION DATA AND TRANSMISSION
ORDER ............................................................... 25
AIR MIX DOOR CONTROL (AUTOMATIC TEM-
PERATURE CONTROL) ..................................... 26
FAN SPEED CONTROL ...................................... 26
INTAKE DOOR CONTROL ................................. 26
MODE DOOR CONTROL ................................... 26
MAGNET CLUTCH CONTROL ........................... 27
SELF-DIAGNOSIS SYSTEM .............................. 27
Description of Control System ................................ 28
Control Operation ................................................... 29
MODE CONTROL DIAL ...................................... 29
TEMPERATURE 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
CAN Communication System Description .............. 32
TROUBLE DIAGNOSIS ............................................ 33
CONSULT-III Function (BCM) ................................ 33
DATA MONITOR ................................................. 33
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 34

ATC-4
PRECAUTIONS
Revision: 2006 November2007 350Z
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NJS000D2
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 Battery ServiceNJS000D3
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Procedures without Cowl Top CoverNJS000CP
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J

AIR CONDITIONER CONTROL
ATC-29
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Revision: 2006 November2007 350Z
Control OperationNJS0000M
MODE CONTROL DIAL
The air discharge outlets are controlled with this dial.
Mode doors are set to the defrost position with this dial. Also, intake doors are set to the outside air position.
When shifting mode control dial to D/F, D/F2 or DEF position under the following conditions, compressor is
turned ON. (A/C LED ON)

FAN: O N

A/C: OFF
TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL)
The set temperature is increased or decreased with this dial.
FAN CONTROL DIAL
The blower speed is automatically or manually controlled with this dial. 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, REC LED turns ON, and air inlet is fixed to REC.

When press intake switch again, FRE LED turns ON, and air inlet is fixed to FRE.

When intake switch is pressed for approximately 1.5 seconds or longer, REC and FRE LEDs blink twice.
Then, automatic control mode is entered. Inlet status is displayed even during automatic control.

When FRE LED is turned ON, shifting mode control dial to D/F, D/F2 or DEF, or when compressor is
turned from ON to OFF, intake switch is automatically turned OFF (fixed to FRE mode). REC mode can be
re-entered by pressing intake switch again, and then compressor is turned ON. (Except D/F, D/F2 or DEF
position)
A/C SWITCH
Compressor is ON or OFF with this switch.
(Pressing the A/C switch when the fan control dial is ON, will turn OFF the A/C switch and compressor.)
SJIA1109E

TROUBLE DIAGNOSIS
ATC-43
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Revision: 2006 November2007 350Z
Auto Amp. Terminals and Reference ValueNJS0000V
Measure voltage between each terminal and ground by referring ter-
minals and reference value for unified meter and A/C amp.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP.
RJIA1356E
RJIA1357E
Terminal
No.Wire
colorItemIgnition
switchConditionVoltage
(V)
1LCAN-H — — —
9L/ORMultiplex communication signal
(TX)—— —
11 P C A N - L — — —
19 R/GMultiplex communication signal
(RX)—— —
21 R/W Power supply from BATT OFF — Battery voltage
22 Y/G Power supply from IGN ON — Battery voltage
29 B Ground (Power) ON — Approx. 0
30 B Ground ON — Approx. 0
38 L/RRear window defogger ON sig-
nalONRear window defogger
switch is depressed.Approx. 0
Rear window defogger
switch is released.Approx. 12
39 Y Ambient sensor — — —
40 BR In-vehicle sensor — — —
41 SB Intake sensor — — —
42 G/Y Compressor ON signal ONA/C switch: ON (Blower
motor operates.)Approx. 0
A/C switch: OFF
SJIA1423J

ATC-44
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
43 G/B A/C LAN signal ON —
46 L/W Power supply from IGN2ACC or
ON— Battery voltage
49 W/L Sensor ground ON — Approx. 0
50 LG Sunload sensor — — —
53 G Blower motor control signal ONBlower speed: 1st speed
(manual)
54 Y/RPower supply for each door
motorON — Battery voltage
56 B/WRear window defogger feedback
signalONRear window defogger
switch: ONApprox. 12
Rear window defogger
switch: OFFApprox. 0
57 BR/W Blower motor ON signal ONFan control dial: ON (A/C
system operates)Approx. 0
Fan control dial: OFF Approx. 5 Terminal
No.Wire
colorItemIgnition
switchConditionVo l ta g e
(V)
SJIA1453J
SJIA1454J

TROUBLE DIAGNOSIS
ATC-85
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Revision: 2006 November2007 350Z
PERFORMANCE CHART
Test Condition
Testing must be performed as follows:
Test Reading
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
Vehicle condition Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door windows Open
Hood Open
TEMP. Max. COLD
Mode control dial
(Ventilation) set
Intake switch
(Recirculation) set
Fan (blower) speedMax. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)
50 - 6020 (68) 6.1 - 8.7 (43 - 48)
25 (77) 8.5 - 11.5 (47 - 53)
60 - 7020 (68) 8.7 - 11.1 (48 - 52)
25 (77) 11.5 - 14.5 (53 - 58)
Ambient air
High-pressure (Discharge side)
kPa (kg/cm
2 , psi)Low-pressure (Suction side)
kPa (kg/cm2 , psi) Relative humidity
%Air temperature
°C (°F)
50 - 7020 (68)850 - 1,050
(8.67 - 10.71, 123.3 - 152.3)180 - 230
(1.84 - 2.35, 26.1 - 33.4)
25 (77)1,020 - 1,260
(10.40 - 12.85, 147.9 - 182.7)190 - 240
(1.94 - 2.45, 27.6 - 34.8)
30 (86)1,150 - 1,410
(11.73 - 14.38, 166.8 - 204.5)210 - 250
(2.14 - 2.55, 30.5 - 36.3)
35 (95)1,240 - 1,510
(12.65 - 15.40, 179.8 - 219.0)220 - 270
(2.24 - 2.75, 31.9 - 39.2)

ATC-102
A/C CONTROLLER
Revision: 2006 November2007 350Z
A/C CONTROLLERPFP:27500
Removal and InstallationNJS0001E
REMOVAL
1. Remove console finisher (A/T) or console boot (M/T). Refer to IP-10, "INSTRUMENT PANEL ASSEM-
BLY" .
2. Remove mounting screws (A) and clips (B), and then remove A/
C controller (1) from console finisher (A/T) or console boot (M/
T).
INSTALLATION
Installation is basically the reverse order of removal.
Disassembly and AssemblyNJS000CT
NOTE:
When disassembling controller, wind gummed tape around each dial assembly and pull out the dial assembly
together with switch from the A/C controller assembly.
SJIA1084J
1. A/C controller assembly 2. Mode control dial 3. Rear window defogger switch
4. Intake switch 5. A/C switch 6. Fan control dial
7. Temperature control dial
SJIA1903E

AIR MIX DOOR MOTOR
ATC-117
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AIR MIX DOOR MOTORPFP:27732
Removal and InstallationNJS0001R
REMOVAL
1. Set the temperature control dial at 18°C (60°F).
2. Open the driver and front passenger window, and then disconnect the battery cable from the negative ter-
minal.
CAUTION:
After the battery cables are disconnected, do not open/close the driver and/or front passenger
door with the window in the full up position. The automatic window adjusting function will not
work and the side roof panel may be damaged.
3. Remove blower unit. Refer to ATC-108, "
BLOWER UNIT" .
4. Disconnect air mix door motor connector.
5. Remove mounting screws, and then remove air mix door motor.
INSTALLATION
Installation is basically the reverse order of removal.
SJIA1175E

REFRIGERANT LINES
ATC-131
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Revision: 2006 November2007 350Z

When recharging refrigerant, check for leaks.
Removal and Installation of Low-pressure Pipe 1 and High-pressure Pipe 2NJS00021
REMOVAL
1. Set the temperature control dial at 18°C (60°F).
2. Open the driver and passenger window, and then disconnect the battery cable from the negative terminal.
CAUTION:
After the battery cables are disconnected, never open/close the driver and/or front passenger door
with the window in the full up position. The automatic window adjusting function will not work and
the side roof panel may be damaged.
3. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
4. Remove cowl top cover. Refer to EI-20, "
COWL TOP" .
5. Remove mounting bolt (A) from low-pressure flexible hose
bracket (1).
6. Remove high-pressure pipe 1 (2) from vehicle clip (B).
7. Disconnect one-touch joint between low-pressure pipe 1 (1) and
low-pressure pipe 2 (2) with disconnector (SST: 9253089916)
(A).
CAUTION:
Cap or wrap the joint of low-pressure pipe 1 and low-pres-
sure pipe 2 with suitable material such as vinyl tape to
avoid the entry of air.
8. Disconnect one-touch joint between high-pressure pipe 1 (3)
and high-pressure pipe 2 (4) with disconnector (SST:
9253089908) (A).
CAUTION:
Cap or wrap the joint of high-pressure pipe 1 and high-pres-
sure pipe 2 with suitable material such as vinyl tape to avoid the entry of air.
9. Remove instrument passenger panel lower. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
10. Remove blower unit. Refer to ATC-108, "
BLOWER UNIT" .
11. Remove air mix door motor and mode door motor. Refer to AT C - 11 7 , "
AIR MIX DOOR MOTOR" and
AT C - 11 6 , "
MODE DOOR MOTOR" .
12. Remove mounting screws, and then remove evaporator cover.High-pressure flexible hose bracket mounting bolt
: 4.2 N·m (0.43 kg-m, 37 in-lb)
PJIA0180E
PJIA0176E
RJIA1411E

ATC-138
REFRIGERANT LINES
Revision: 2006 November2007 350Z
Checking for Refrigerant LeaksNJS00027
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electrical leak detector or fluorescent dye leak
detector (SST: J-42220).
If dye is observed, confirm the leak with an electrical leak detector. It is possible a prior leak was repaired and
not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electrical leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electrical leak detector probe slower and closer to the suspected leak area will improve the
chances of finding a leak.
Checking System for Leaks Using the Fluorescent Leak DetectorNJS00028
1. Check A/C system for leaks using the UV lamp and safety goggles (SST: J-42220) in a low sunlight area
(area without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a
bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain open-
ing indicates an evaporator core assembly (tubes, core or expansion valve) leak.
2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth, with the UV lamp for dye residue.
3. After the leak is repaired, remove any residual dye using dye cleaner (SST: J-43872) to prevent future
misdiagnosis.
4. Perform a system performance check and verify the leak repair with an approved electrical leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.
Dye InjectionNJS00029
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm
2 , 50 psi).
2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (SST: J-41459).
3. Connect the injector tool to the A/C low-pressure side service valve.
4. Start the engine and switch A/C ON.
5. When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye
through the low-pressure service valve using dye injector tool (SST: J-41459) (refer to the manufacture’s
operating instructions).
6. With the engine still running, disconnect the injector tool from the service valve.
CAUTION:
Be careful the A/C system or replacing a component, pour the dye directly into the open system
connection and proceed with the service procedures.
7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the
leak size, operating conditions and location of the leak, it may take from minutes to days for the dye to
penetrate a leak and become visible.
8. Attach a blue label as necessary.