Nissan Frontier D40. Instruction — part 724

EXPANSION VALVE

HA-39

< ON-VEHICLE REPAIR >

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EXPANSION VALVE

Removal and Installation for Expansion Valve

INFOID:0000000005272571

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-26, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the heater and cooling unit assembly. Refer to

VTL-12, "Removal and Installation"

.

3.

Remove the heater core and evaporator pipes grommet.

4.

Remove the expansion valve.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-rings on then 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-25, "Component"

.

A/C refrigerant pipe to expansion valve bolt

: Refer to

HA-25, "Component"

.

HA-40

< SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Service Data and Specification (SDS)

INFOID:0000000005272572

COMPRESSOR

OIL

REFRIGERANT

Make

CALSONIC KANSEI CO. LTD.

Model

CR-14

Type

Vane rotary (5 vanes)

Displacement

144 cm

3

(8.79 in

3

) / revolution

Relief valve set pressure

3800

±

300 kPa (38.76

±

3.06 kg/cm

2

, 551.0

±

43.5 psi)

Direction of rotation

Clockwise (viewed from drive end)

Drive belt

Poly V ribbed

Description

Genuine NISSAN A/C System Lubricant Type R

Capacity

180 m

(6.1 US fl oz, 6.3 Imp fl oz)

Type

HFC 134a (R-134a)

Capacity

0.70

±

0.05 kg (1.54

±

0.11 lb)

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

MANUAL A/C (TYPE 1)

BASIC INSPECTION . . . . . . . . .

4

MANUAL A/C IDENTIFICATION TABLE . . ...

4

Application Table . . . . . . . . . . . . . ...

4

DIAGNOSIS AND REPAIR WORKFLOW . . ..

5

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

5

INSPECTION AND ADJUSTMENT . . . . . .

6

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

6

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

7

MANUAL A/C IDENTIFICATION TABLE . . ...

7

Application Table . . . . . . . . . . . . . ...

7

FUNCTION INFORMATION . . . . . . . .

8

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

8

REFRIGERATION SYSTEM . . . . . . . ..

10

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

10

Refrigerant System Protection . . . . . . . .

10

MANUAL AIR CONDITIONER SYSTEM . . ...

11

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

11

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

11

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

12

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

13

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

15

CONSULT-III Function (BCM - COMMON ITEM) .

15

CONSULT-III Function (BCM - AIR CONDITION-
ER) . . . . . . . . . . . . . . . . . . ..

15

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

17

Front Air Control Self-Diagnosis . . . . . . . ..

17

Front Air Control Self-Diagnosis Chart . . . . .

17

COMPONENT DIAGNOSIS . . . . . . .

18

MANUAL A/C IDENTIFICATION TABLE . . .

18

Application Table . . . . . . . . . . . . . .

18

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

19

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

19

Mode Door Motor Component Function Check . ...

19

Mode Door Motor Diagnosis Procedure . . . . ..

20

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

24

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

24

Air Mix Door Motor Component Function Check . .

25

Air Mix Door Motor Diagnosis Procedure . . . .

25

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

29

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

29

Intake Door Motor Component Function Check . ..

29

Intake Door Motor Diagnosis Procedure . . . . .

30

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

32

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

32

Front Blower Motor Component Function Check .

32

Front Blower Motor Diagnosis Procedure . . . .

33

Front Blower Motor Component Inspection . . . .

37

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

38

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

38

Magnet Clutch Component Function Check . . .

38

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

38

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

42

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

42

Intake Sensor Diagnosis Procedure . . . . . .

42

Intake Sensor Component Inspection . . . . . .

43

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

45

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

45

Front Air Control Component Function Check . . .

45

Front Air Control Power and Ground Diagnosis
Procedure . . . . . . . . . . . . . . . .

45

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

47

HAC-2

MANUAL A/C IDENTIFICATION TABLE . . ..

47

Application Table . . . . . . . . . . . . ....

47

AIR CONDITIONER CONTROL . . . . . .

48

Front Air Control Terminals Reference Values . ...

48

Wiring Diagram - Air Conditioner Control - With
VBC . . . . . . . . . . . . . . . . . ....

50

SYMPTOM DIAGNOSIS . . . . . . . .

57

MANUAL A/C IDENTIFICATION TABLE . . ..

57

Application Table . . . . . . . . . . . . ....

57

AIR CONDITIONER CONTROL . . . . . .

58

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

58

INSUFFICIENT COOLING . . . . . . . . .

59

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

59

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

60

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

62

Trouble Diagnoses for Abnormal Pressure . . ....

63

INSUFFICIENT HEATING . . . . . . . . .

67

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

67

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

69

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

69

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

71

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

71

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

71

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

71

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

72

MANUAL A/C (TYPE 2)

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

73

MANUAL A/C IDENTIFICATION TABLE . . ..

73

Application Table . . . . . . . . . . . . ....

73

DIAGNOSIS AND REPAIR WORKFLOW . . .

74

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

74

INSPECTION AND ADJUSTMENT . . . . ...

75

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

75

FUNCTION DIAGNOSIS . . . . . . . .

77

MANUAL A/C IDENTIFICATION TABLE . . ..

77

Application Table . . . . . . . . . . . . ....

77

FUNCTION INFORMATION . . . . . . . ..

78

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

78

REFRIGERATION SYSTEM . . . . . . . ..

80

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

80

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

80

MANUAL AIR CONDITIONER SYSTEM . . ...

81

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

81

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

81

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

82

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

83

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

85

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

85

CONSULT-III Function (BCM - AIR CONDITION-
ER) . . . . . . . . . . . . . . . . . . ..

85

COMPONENT DIAGNOSIS . . . . . ...

87

MANUAL A/C IDENTIFICATION TABLE . . ..

87

Application Table . . . . . . . . . . . . .

87

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

88

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

88

Mode Door Motor Component Function Check . ..

88

Mode Door Motor Diagnosis Procedure . . . . ..

89

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

91

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

91

Air Mix Door Motor Component Function Check .

92

Air Mix Door Motor Diagnosis Procedure . . . .

92

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

95

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

95

Intake Door Motor Component Function Check . ..

95

Intake Door Motor Diagnosis Procedure . . . . .

96

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

98

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

98

Front Blower Motor Component Function Check .

98

Front Blower Motor Diagnosis Procedure . . . ...

99

Front Blower Motor Component Inspection . . ..

102

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

105

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

105

Magnet Clutch Component Function Check . . .

105

Magnet Clutch Diagnosis Procedure . . . . .

105

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

109

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

109

Intake Sensor Diagnosis Procedure . . . . . .

109

Intake Sensor Component Inspection . . . . ...

110

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

112

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

112

Front Air Control Component Function Check . ..

112

Front Air Control Power and Ground Diagnosis
Procedure . . . . . . . . . . . . . . . .

112

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

114

MANUAL A/C IDENTIFICATION TABLE . . .

114

Application Table . . . . . . . . . . . . ..

114

AIR CONDITIONER CONTROL . . . . . ...

115

Front Air Control Terminals Reference Values . .

115

Wiring Diagram - Air Conditioner Control - Without
VBC . . . . . . . . . . . . . . . . . ...

117