2006 INFINITI M35 belt

PRECAUTIONS
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Revision: 2006 January2006 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NCS001JC
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.
WAR NING :
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 On Board Diagnostic (OBD) System of A/T and EngineNCS001JD
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
Be sure to turn the ignition switch OFF and disconnect the battery cable from the negative termi-
nal before any repair or inspection work. The open/short circuit of related switches, sensors, sole-
noid valves, etc. will cause the MIL to light up.
Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.
Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.
Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.

ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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Revision: 2006 January2006 M35/M45
AUTOMATIC AIR CONDITIONER
PRECAUTIONS .......................................................... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 5
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect .......................................... 5
OPERATION PROCEDURE ................................. 5
Precautions for Procedures without Cowl Top Cover ..... 6
Precautions for Working with HFC-134a (R-134a) ..... 6
CONTAMINATED REFRIGERANT ....................... 7
General Refrigerant Precautions .............................. 7
Precautions for Refrigerant Connection ................... 7
ABOUT ONE-TOUCH JOINT ................................ 7
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION .................................................... 10
O-RING AND REFRIGERANT CONNECTION ... 10
Precautions for Servicing Compressor ................... 12
Precautions for Service Equipment ........................ 13
RECOVERY/RECYCLING EQUIPMENT ............ 13
ELECTRICAL LEAK DETECTOR ....................... 13
VACUUM PUMP ................................................. 13
MANIFOLD GAUGE SET .................................... 13
SERVICE HOSES ............................................... 14
SERVICE COUPLERS ........................................ 14
REFRIGERANT WEIGHT SCALE ...................... 14
CHARGING CYLINDER ...................................... 14
Precautions for Leak Detection Dye ....................... 15
IDENTIFICATION ................................................ 15
IDENTIFICATION LABEL FOR VEHICLE ........... 15
PREPARATION ......................................................... 16
Special Service Tools ............................................. 16
HFC-134a (R-134a) Service Tools and Equipment ... 17
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 ............................... 20Variable Displacement Compressor ....................... 21
GENERAL INFORMATION ................................. 21
DESCRIPTION .................................................... 22
Component Layout ................................................. 25
LUBRICANT .............................................................. 26
Maintenance of Lubricant Quantity in Compressor ... 26
LUBRICANT ........................................................ 26
LUBRICANT RETURN OPERATION .................. 26
LUBRICANT ADJUSTING PROCEDURE FOR
COMPONENTS REPLACEMENT EXCEPT
COMPRESSOR .................................................. 27
LUBRICANT ADJUSTING PROCEDURE FOR
COMPRESSOR REPLACEMENT ....................... 27
AIR CONDITIONER CONTROL ............................... 29
Description of Air Conditioner LAN Control System ... 29
System Construction .............................................. 29
OPERATION ........................................................ 30
TRANSMISSION DATA AND TRANSMISSION
ORDER ............................................................... 30
AIR MIX DOOR CONTROL (AUTOMATIC TEM-
PERATURE CONTROL) ..................................... 31
FAN SPEED CONTROL ...................................... 31
INTAKE DOOR CONTROL ................................. 31
MODE DOOR CONTROL ................................... 31
UPPER VENTILATOR DOOR CONTROL .......... 31
MAGNET CLUTCH CONTROL ........................... 32
SELF-DIAGNOSIS SYSTEM .............................. 32
Description of Control System ................................ 33
Control Operation ................................................... 33
DISPLAY SCREEN .............................................. 33
MULTIFUNCTION SWITCH ................................ 34
DISPLAY SCREEN .............................................. 34
MODE SWITCH (DRIVER SIDE) ........................ 34
MODE SWITCH (PASSENGER SIDE) ................ 34
TEMPERATURE CONTROL SWITCH (POTEN-
TIO TEMPERATURE CONTROL) (DRIVER
SIDE) ................................................................... 34
TEMPERATURE CONTROL SWITCH (POTEN-
TIO TEMPERATURE CONTROL) (PASSEN-
GER SIDE) .......................................................... 34

ATC-4Revision: 2006 January2006 M35/M45 and High-Pressure Pipe 2 ....................................162
REMOVAL ........................................................
.162
INSTALLATION ..................................................163
Removal and Installation of Liquid Tank ...............164
DISASSEMBLY AND ASSEMBLY ....................164
REMOVAL ........................................................
.164
INSTALLATION ..................................................165
Removal and Installation of Condenser ................165
REMOVAL ........................................................
.165
INSTALLATION ..................................................167
Removal and Installation of Refrigerant Pressure
Sensor ..................................................................167
REMOVAL ........................................................
.167
INSTALLATION ..................................................167
Removal and Installation of Evaporator ................168
REMOVAL ........................................................
.168
INSTALLATION ..................................................168Removal and Installation of Expansion Valve .......169
REMOVAL ..........................................................169
INSTALLATION ..................................................169
Checking for Refrigerant Leaks ............................170
Checking System for Leaks Using the Fluorescent
Leak Detector ........................................................170
Dye Injection .........................................................170
Electrical Refrigerant Leak Detector .....................171
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................171
CHECKING PROCEDURE ................................172
SERVICE DATA AND SPECIFICATIONS (SDS) ....174
Compressor ..........................................................174
Lubricant ...............................................................174
Refrigerant ............................................................174
Engine Idling Speed ..............................................174
Belt Tension ..........................................................174

PRECAUTIONS
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Revision: 2006 January2006 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NJS000FN
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.
WAR NING :
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 Necessary for Steering Wheel Rotation After Battery DisconnectNJS000FO
NOTE:
This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
Remove and install all control units after disconnecting both battery cables with the ignition knob in the
LOCK position.
Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the
ACC position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the
LOCK position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.

ATC-100
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
*1ATC-56, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2 to 6.*2ATC-83, "
Air Mix Door Motor Circuit"*3ATC-103, "Test Reading
(VQ35DE)" or ATC-104, "Test
Reading (VK45DE)"
*4ATC-62, "AUXILIARY MECHA-
NISM: TEMPERATURE SETTING
TRIMMER"
*5ATC-56, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.*6ATC-70, "
LAN System Circuit"
*7ATC-89, "Blower Motor Circuit"*8ATC-94, "Magnet Clutch Circuit"*9ATC-101, "PERFORMANCE TEST
DIAGNOSIS"
*10ATC-64, "Operational Check"*11AT C - 7 , "CONTAMINATED REFRIG-
ERANT"
*12EM-15, "Checking Drive Belts"
(VQ35DE) or EM-174, "
Checking
Drive Belts" (VK45DE)
*13EC-512, "
SYSTEM DESCRIPTION"
(VQ35DE) or EC-1239, "
SYSTEM
DESCRIPTION" (VK45DE)

ATC-102
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
*1ATC-157, "Check Disc to Pulley
Clearance"
*2ATC-89, "Blower Motor Circuit"*3EM-15, "Checking Drive Belts"
(VQ35DE) or EM-174, "
Checking
Drive Belts" (VK45DE)
SJIA1642E

TROUBLE DIAGNOSIS
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Revision: 2006 January2006 M35/M45
Self-DiagnosisNJS000GY
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
*1AT C - 6 4 , "Operational Check"*2ATC-157, "Check Disc to Pulley
Clearance"
*3AT C - 2 6 , "Maintenance of Lubricant
Quantity in Compressor"
*4EM-15, "Checking Drive Belts"
(VQ35DE) or EM-174, "
Checking
Drive Belts" (VK45DE)
*1AT C - 6 4 , "
Operational Check"*2ATC-66, "Power Supply and Ground
Circuit for Auto Amp."
*3AT C - 4 1 , "SYMPTOM TABLE"
SJIA1699E

REFRIGERANT LINES
ATC-155
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Revision: 2006 January2006 M35/M45
Removal and Installation of CompressorNJS000HO
REMOVAL
VQ35DE
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Remove air cleaner case and air duct. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
3. Remove engine undercover, using power tools.
4. Remove mounting nuts from low-pressure flexible hose and
high-pressure flexible hose.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
5. Disconnect compressor (magnet clutch and ECV) connectors.
6. Remove A/C compressor belt. Refer to EM-15, "
DRIVE BELTS" .
7. Remove mounting bolts, and then remove damper bracket.
RJIA4153E
RJIA4155E
RJIA4157E