Infiniti FX35 / FX45. Manual - part 101

 

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Infiniti FX35 / FX45. Manual - part 101

 

 

AT-332

< SERVICE INFORMATION >

SERVICE DATA AND SPECIFICATIONS (SDS)

A/T Fluid Temperature Sensor

INFOID:0000000001327418

Turbine Revolution Sensor

INFOID:0000000001327419

Vehicle Speed Sensor A/T (Revolution Sensor)

INFOID:0000000001327420

Reverse Brake

INFOID:0000000001327421

Total End Play

INFOID:0000000001327422

Name

Condition   

CONSULT-III “DATA MONITOR” (Approx.)

Resistance (Approx.)

A/T fluid temperature sensor 1

0

°

C (32

°

F)

3.3 V

15 k

20

°

C (68

°

F)

2.7 V

6.5 k

80

°

C (176

°

F)

0.9 V

0.9 k

A/T fluid temperature sensor 2

0

°

C (32

°

F)

3.3 V

10 k

20

°

C (68

°

F)

2.5 V

4 k

80

°

C (176

°

F)

0.7 V

0.5 k

Name

Condition

Data   (Approx.)

Turbine revolution sensor 1

When running at 50 km/h (31 MPH) in 4th speed with the closed throttle po-
sition signal OFF.

 1.3 kHz

Turbine revolution sensor 2

When moving at 20 km/h (12 MPH) in 1st speed with the closed throttle po-
sition signal OFF.

Name

Condition

Data (Approx.)

Revolution sensor

When moving at 20 km/h (12 MPH).

185 Hz

Model code number

91X3A, 91X3B

96X1C

Number of drive plates

6

Number of driven plates

6

Clearance

mm (in)

Standard

0.7 - 1.1 (0.028 - 0.043)

Total end play

mm (in)

0.25 - 0.55 (0.0098 - 0.0217)

ATC-1

AIR CONDITIONER

C

D

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G

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SECTION 

ATC

A

B

ATC

N

O

P

CONTENTS

AUTOMATIC AIR CONDITIONER

SERVICE INFORMATION  ............................

3

PRECAUTIONS ...................................................

3

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
..

3

Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
..

3

Precaution for Procedure without Cowl Top Cover 

......

4

Precaution for Working with HFC-134a (R-134a) ......

4

General Refrigerant Precaution  ................................

4

Precaution for Refrigerant Connection ......................

5

Precaution for Service of Compressor  ......................

9

Precaution for Service Equipment .............................

9

Precaution for Leak Detection Dye  .........................

11

PREPARATION ..................................................

13

Special Service Tool  ...............................................

13

HFC-134a (R-134a) Service Tool and Equipment 

....

13

Commercial Service Tool  ........................................

16

REFRIGERATION SYSTEM  ..............................

17

Refrigerant Cycle  ....................................................

17

Refrigerant System Protection  ................................

17

V-6 Variable Displacement Compressor  .................

17

Component Part Location  .......................................

21

LUBRICANT .......................................................

22

Maintenance of Lubricant Quantity in Compressor 

....

22

AIR CONDITIONER CONTROL  .........................

24

Description of Air Conditioner LAN Control Sys-
tem ..........................................................................

24

System Construction  ...............................................

24

Description of Control System .................................

27

Control Operation ....................................................

27

Fail-Safe Function  ...................................................

28

Discharge Air Flow  ..................................................

29

System Description  .................................................

30

CAN Communication System Description ...............

30

TROUBLE DIAGNOSIS  .....................................

32

CONSULT-III Function  ............................................

32

How to Perform Trouble Diagnosis for Quick and 
Accurate Repair .......................................................

32

Component Parts and Harness Connector Loca-
tion ...........................................................................

34

Schematic ................................................................

36

Wiring Diagram - A/C -  ............................................

37

Auto Amp. Terminal and Reference Value  ..............

42

Self-Diagnosis Function ...........................................

43

Operational Check ...................................................

50

Power Supply and Ground Circuit for Auto Amp  .....

52

LAN System Circuit  .................................................

54

Mode Door Motor Circuit  .........................................

57

Air Mix Door Motor Circuit  .......................................

59

Air Mix Door Motor PBR Circuit  ...............................

62

Intake Door Motor Circuit .........................................

62

Blower Motor Circuit  ................................................

64

Magnet Clutch Circuit  ..............................................

69

Insufficient Cooling  ..................................................

75

Insufficient Heating  ..................................................

82

Noise .......................................................................

83

Self-Diagnosis .........................................................

84

Memory Function .....................................................

85

Ambient Sensor Circuit ............................................

86

In-vehicle Sensor Circuit ..........................................

88

Sunload Sensor Circuit ............................................

91

Intake Sensor Circuit  ...............................................

94

CONTROLLER ..................................................

97

Removal and Installation of A/C and AV Switch ......

97

AUTO AMP ........................................................

98

Removal and Installation of Unified Meter and A/C 
Amp .........................................................................

98

AMBIENT SENSOR  ..........................................

99

Removal and Installation  .........................................

99

IN-VEHICLE SENSOR  ....................................

100

Removal and Installation  .......................................

100

SUNLOAD SENSOR .......................................

101

ATC-2

Removal and Installation  .......................................

101

INTAKE SENSOR  ............................................

102

Removal and Installation  .......................................

102

BLOWER UNIT  ................................................

103

Removal and Installation  .......................................

103

Disassembly and Assembly ...................................

104

BLOWER MOTOR  ...........................................

105

Removal and Installation  .......................................

105

INTAKE DOOR MOTOR  ..................................

106

Removal and Installation  .......................................

106

IN-CABIN MICROFILTER ................................

107

Removal and Installation  .......................................

107

HEATER & COOLING UNIT ASSEMBLY  .......

108

Removal and Installation  .......................................

108

Disassembly and Assembly ...................................

111

MODE DOOR MOTOR  ....................................

113

Removal and Installation  .......................................

113

AIR MIX DOOR MOTOR ..................................

114

Removal and Installation  .......................................

114

HEATER CORE  ...............................................

115

Removal and Installation  .......................................

115

DUCTS AND GRILLES ....................................

116

Removal and Installation  .......................................

116

REFRIGERANT LINES  ....................................

120

HFC-134a (R-134a) Service Procedure  ................

120

Component ...........................................................

121

Removal and Installation of Compressor  ..............

123

Removal and Installation of Compressor Clutch ...

125

Removal and Installation of Low-Pressure Flexi-
ble Hose ................................................................

128

Removal and Installation of High-pressure Flexi-
ble Hose ................................................................

129

Removal and Installation of Low-Pressure Pipe 1 
(Engine Compartment) ..........................................

131

Removal and Installation of High-pressure Pipe 1 
and 2 (Engine Compartment) ................................

132

Removal and Installation of Low-Pressure Pipe 2 
and High-pressure Pipe 3  .....................................

133

Removal and Installation of Liquid Tank  ...............

134

Removal and Installation of Condenser  ................

135

Removal and Installation of Refrigerant Pressure 
Sensor ...................................................................

137

Removal and Installation of Evaporator  ................

137

Removal and Installation of Expansion Valve .......

138

Checking of Refrigerant Leaks ..............................

138

Checking System for Leaks Using the Fluorescent 
Leak Detector ........................................................

138

Dye Injection  .........................................................

139

Electrical Leak Detector  ........................................

139

SERVICE DATA AND SPECIFICATIONS 
(SDS) ................................................................

142

Compressor ..........................................................

142

Lubricant ...............................................................

142

Refrigerant ............................................................

142

Engine Idling Speed ..............................................

142

Belt Tension  ..........................................................

142

PRECAUTIONS

ATC-3

< SERVICE INFORMATION >

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ATC

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SERVICE INFORMATION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000001612929

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 “SUPPLEMENTAL RESTRAINT SYS-
TEM” and “SEAT BELTS” of this Service Manual.

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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SUPPLEMENTAL RESTRAINT SYSTEM”.

• 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 har-
ness connectors.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000001612931

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-III 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-III.

 

 

 

 

 

 

 

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