Nissan Pathfinder (2009 year). Manual - part 450

 

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Nissan Pathfinder (2009 year). Manual - part 450

 

 

HA-54

< ON-VEHICLE REPAIR >

CONDENSER

CONDENSER

Removal and Installation for Condenser

INFOID:0000000003935725

REMOVAL

1.

Discharge the refrigerant. Refer to 

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the radiator. Refer to 

CO-45, "Removal and Installation"

 (VK56DE), 

CO-16, "Removal and Instal-

lation"

 (VQ40DE).

CAUTION:

Be careful not to damage the core surface of the condenser and the radiator.

3.

Disconnect the front high-pressure flexible A/C hose and the front high-pressure A/C pipe from the con-
denser.

CAUTION:

Cap or wrap the joint of the pipes with suitable material such as vinyl tape to avoid the entry of air.

4.

Disconnect the refrigerant pressure sensor harness connector.

5.

Remove the refrigerant pressure sensor from the condenser.

6.

Lift the condenser out of the mounting grommets and remove
the condenser.

INSTALLATION

Installation is in the reverse order of removal.
Refer to 

HA-34, "Component"

.

CAUTION:

• Replace the O-rings of the front high-pressure A/C pipe, refrigerant pressure sensor, and front high-

pressure flexible A/C hose with new ones, then apply compressor oil to them for installation.

• After charging refrigerant, check for leaks.
• Replace the mounting grommets as necessary.

LJIA0177E

2009 Pathfinder

REFRIGERANT PRESSURE SENSOR

HA-55

< ON-VEHICLE REPAIR >

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REFRIGERANT PRESSURE SENSOR

Removal and Installation for Refrigerant Pressure Sensor

INFOID:0000000003935726

REMOVAL

1.

Discharge the refrigerant. Refer to 

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Disconnect the refrigerant pressure sensor harness connector
and remove the refrigerant pressure sensor from the condenser.

CAUTION:

Be careful not to damage the condenser fins.

INSTALLATION

Installation is in the reverse order of removal.
Refer to 

HA-34, "Component"

.

CAUTION:

• Be careful not to damage the condenser fins.
• Replace the O-ring of the refrigerant pressure sensor with a new one, then apply compressor oil to it

for installation.

• After charging refrigerant, check for leaks.

LJIA0177E

2009 Pathfinder

HA-56

< ON-VEHICLE REPAIR >

EXPANSION VALVE

EXPANSION VALVE

Removal and Installation for Front Expansion Valve

INFOID:0000000003935727

REMOVAL

1.

Discharge the refrigerant. Refer to 

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the front heater and cooling unit assembly. Refer to 

VTL-18, "Removal and Installation"

.

3.

Remove the front heater core and evaporator pipes grommet.

4.

Remove the front expansion valve.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-rings on then front expansion valve and the A/C refrigerant pipes with new ones, then

apply compressor oil to them for installation.

• After charging refrigerant, check for leaks.

Expansion valve bolts

: Refer to 

HA-34, "Component"

.

A/C refrigerant pipe to expansion valve bolt

: Refer to 

HA-34, "Component"

.

2009 Pathfinder

AMBIENT SENSOR

HA-57

< ON-VEHICLE REPAIR >

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AMBIENT SENSOR

Removal and Installation

INFOID:0000000003935728

REMOVAL

1.

Remove the front grille. Refer to 

EXT-18, "Removal and Installation"

.

2.

Disconnect the ambient sensor (1) electrical connector.

: Front

NOTE:
The ambient sensor is located behind the front grille, below the
hood latch.

3.

Release the ambient sensor (1) clip and then remove the ambi-
ent sensor (1).

INSTALLATION

Installation is in the reverse order of removal.

AWIIA0262ZZ

2009 Pathfinder

HA-58

< ON-VEHICLE REPAIR >

HEATER PUMP

HEATER PUMP

Removal and Installation

INFOID:0000000003935729

Heater Pump

NOTE:
Only the VQ40DE engine is equipped with a heater pump for the rear heater system.

REMOVAL

1.

Partially drain the engine cooling system. Refer to 

CO-12, "Changing Engine Coolant"

 (VQ40DE).

2.

Disconnect the heater pump electrical connector.

3.

Disconnect the two heater hoses.

4.

Remove the heater pump from the bracket securing the heater pump to the cowl top.

CAUTION:

Do not disassemble the heater pump, replace the heater pump as an assembly.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• The heater pump rubber mount must be fully seated on the bracket.
• Do not disassemble the heater pump, replace the heater pump as an assembly.

LBIA0414E

1.

Cowl top

2.

Heater pump electrical connector

3.

Heater pump

4.

Heater hose and clamp

5.

Heater hose and clamp

2009 Pathfinder

SERVICE DATA AND SPECIFICATIONS (SDS)

HA-59

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Service Data and Specification (SDS)

INFOID:0000000003935730

COMPRESSOR

OIL

REFRIGERANT

Make

ZEXEL VALEO CLIMATE CONTROL

Model

DKS-17D

Type

Swash plate

Displacement

175.5 cm

3

 (10.7 in

3

) / revolution

Cylinder bore 

×

 stroke

30.5 mm (1.20 in) x 24.0 mm (0.94 in)

Direction of rotation

Clockwise (viewed from drive end)

Drive belt

Poly V

Name

NISSAN A/C System Oil Type S or equivalent

Capacity

With rear A/C

210 m

 (7.1 US fl oz, 7.4 Imp fl oz)

Without rear A/C

190 m

 (6.1 US fl oz, 6.3 Imp fl oz)

Type

HFC 134a (R-134a)

Capacity

With rear A/C

0.85 

±

 0.05 kg (1.87 

±

 0.11 lb)

Without rear A/C

0.70 

±

 0.05 kg (1.54 

±

 0.11 lb)

2009 Pathfinder

HAC-1

VENTILATION, HEATER & AIR CONDITIONER

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SECTION 

HAC

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HAC

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CONTENTS

HEATER & AIR CONDITIONING CONTROL SYSTEM

AUTOMATIC AIR CONDITIONER

BASIC INSPECTION  ....................................

4

DIAGNOSIS AND REPAIR WORKFLOW  ..........

4

How to Perform Trouble Diagnosis For Quick And 
Accurate Repair  ......................................................
..

4

INSPECTION AND ADJUSTMENT .....................

5

Operational Check (Front) .........................................

5

Operational Check (Rear)  .........................................

6

FUNCTION DIAGNOSIS ...............................

8

FUNCTION INFORMATION  ................................

8

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

8

Symptom Table  .......................................................

11

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

13

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

13

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

13

AUTOMATIC AIR CONDITIONER SYSTEM  .....

15

Control System Diagram  .........................................

15

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

15

Discharge Air Flow (Front)  ......................................

18

Switches And Their Control Function (Front)  ..........

19

Switches And Their Control Function (Rear) ...........

20

DIAGNOSIS SYSTEM (HVAC)  ..........................

21

CONSULT-III Function (HVAC) ...............................

21

DIAGNOSIS SYSTEM (BCM)  ............................

22

CONSULT-III Function (BCM - COMMON ITEM) ....

22

CONSULT-III Function (BCM - AUTO AIR CON-
DITIONER) ..............................................................

22

SELF-DIAGNOSIS FUNCTION ..........................

24

A/C Auto Amp. Self-Diagnosis  ................................

24

A/C and AV Switch Assembly Self-Diagnosis  .........

24

A/C System Self-Diagnosis Code Chart ..................

25

COMPONENT DIAGNOSIS  .........................

26

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

26

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

26

Mode Door Motor (Front) Component Function 
Check ......................................................................

27

Mode Door Motor (Front) Diagnosis Procedure  ......

28

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

32

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

32

Air Mix Door Motor Component Function Check  .....

33

Air Mix Door Motor (Driver) Diagnosis Procedure ....

34

Air Mix Door Motor (Passenger) Diagnosis Proce-
dure .........................................................................

38

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

42

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

42

Intake Door Motor Component Function Check  ......

43

Intake Door Motor Diagnosis Procedure  .................

44

BLOWER MOTOR CONTROL SYSTEM  ..........

46

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

46

Front Blower Motor Component Function Check ....

47

Front Blower Motor Diagnosis Procedure ................

48

Front Blower Motor Component Inspection  .............

52

Rear Blower Motor Description ................................

52

Rear Blower Motor Component Function Check  .....

53

Rear Air Control (Front) Diagnosis Procedure #1 ....

54

Rear Air Control (Rear) Diagnosis Procedure #2 ....

55

Rear Air Control (Rear) Diagnosis Procedure #3 ....

56

Rear Air Control (Rear) Diagnosis Procedure #4 ....

59

Rear Blower Motor And Relay Component Inspec-
tion ...........................................................................

60

REAR AIR CONTROL SYSTEM .......................

62

Rear Air Control System Description .......................

62

Rear Air Control Component Function Check  .........

62

Rear Air Control (Front) Diagnosis Procedure .........

63

Rear Air Control (Rear) Diagnosis Procedure  .........

65

MAGNET CLUTCH  ...........................................

68

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

68

Magnet Clutch Component Function Check ............

68

Magnet Clutch Diagnosis Procedure  .......................

69

2009 Pathfinder

HAC-2

WATER VALVE CIRCUIT ..................................

73

Water Valve Description (VK56DE)  ........................

73

Water Valve Diagnosis Procedure (VK56DE) .........

73

HEATER PUMP  .................................................

75

System Description (VQ40DE)  ...............................

75

Diagnosis Procedure (VQ40DE) .............................

75

Component Inspection (VQ40DE)  ..........................

77

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

78

Component Description  ..........................................

78

Ambient Sensor Diagnosis Procedure ....................

78

Ambient Sensor Component Inspection  .................

79

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

81

Component Description  ..........................................

81

In-Vehicle Sensor Diagnosis Procedure  .................

81

In-Vehicle Sensor Component Inspection  ..............

83

OPTICAL SENSOR  ...........................................

84

Component Description  ..........................................

84

Optical Sensor Diagnosis Procedure ......................

84

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

86

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

86

Intake Sensor Diagnosis Procedure  .......................

86

Intake Sensor Component Inspection  ....................

87

POWER SUPPLY AND GROUND CIRCUIT 
FOR CONTROLLER  ..........................................

88

Component Description  ..........................................

88

A/C Auto Amp. Component Function Check  ..........

88

A/C Auto Amp Power and Ground Diagnosis Pro-
cedure ....................................................................
.

89

ECU DIAGNOSIS  ........................................

90

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

90

A/C Auto Amp. Terminals Reference Values  .........

90

Wiring Diagram  .......................................................

92

SYMPTOM DIAGNOSIS  ............................

108

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

108

Symptom Matrix Chart .........................................

108

INSUFFICIENT COOLING  ...............................

109

Component Function Check  ..................................

109

Diagnostic Work Flow  ............................................

110

Performance Chart  ................................................

112

Trouble Diagnoses for Abnormal Pressure  ...........

113

INSUFFICIENT HEATING  ...............................

117

Component Function Check  ..................................

117

NOISE ..............................................................

119

Component Function Check  ..................................

119

MEMORY FUNCTION DOES NOT OPERATE .

121

Memory Function Check ........................................

121

PRECAUTION ............................................

122

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

122

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

122

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

122

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

123

MANUAL AIR CONDITIONER

BASIC INSPECTION .................................

124

DIAGNOSIS AND REPAIR WORKFLOW ........

124

How to Perform Trouble Diagnosis For Quick And 
Accurate Repair  ....................................................

124

INSPECTION AND ADJUSTMENT  ..................

125

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

125

FUNCTION DIAGNOSIS  ...........................

127

FUNCTION INFORMATION  .............................

127

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

127

Symptom Table .....................................................

129

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

130

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

130

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

130

MANUAL AIR CONDITIONER SYSTEM  .........

132

Control System Diagram .......................................

132

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

132

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

134

Switches And Their Control Function ....................

134

DIAGNOSIS SYSTEM (BCM) ...........................

136

CONSULT-III Function (BCM - COMMON ITEM) .

136

CONSULT-III Function (BCM - AUTO AIR CON-
DITIONER) ............................................................

136

COMPONENT DIAGNOSIS  ......................

138

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

138

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

138

Mode Door Motor (Front) Component Function 
Check ....................................................................

138

Mode Door Motor (Front) Diagnosis Procedure  ....

139

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

142

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

142

Air Mix Door Motor Component Function Check  ..

143

Air Mix Door Motor Diagnosis Procedure ..............

144

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

146

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

146

Intake Door Motor Component Function Check ....

146

Intake Door Motor Diagnosis Procedure ...............

147

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

149

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

149

Front Blower Motor Component Function Check  ..

149

Front Blower Motor Diagnosis Procedure  .............

150

Front Blower Motor Component Inspection  ..........

154

MAGNET CLUTCH  ...........................................

156

2009 Pathfinder

 

 

 

 

 

 

 

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