Infiniti FX35, FX50 (S51). Manual — part 1122

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VENTILATION, HEATER & AIR CONDITIONER

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SECTION

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CONTENTS

HEATER & AIR CONDITIONING SYSTEM

VQ35HR

BASIC INSPECTION . . . . . . . . .

4

DIAGNOSIS AND REPAIR WORKFLOW . . ..

4

Work Flow . . . . . . . . . . . . . . . .....

4

SYSTEM DESCRIPTION . . . . . . . ..

5

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

5

System Diagram . . . . . . . . . . . . . ....

5

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

5

Component Parts Location . . . . . . . . . ....

6

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

7

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

8

REFRIGERATION SYSTEM SYMPTOMS . . ..

8

Trouble Diagnosis For Unusual Pressure . . . .....

8

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

8

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

11

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

11

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

11

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

11

Precaution for Procedure without Cowl Top Cover

.

12

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

12

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

12

Refrigerant Connection . . . . . . . . . . ...

13

Service Equipment . . . . . . . . . . . . ..

17

COMPRESSOR . . . . . . . . . . . . ..

19

General Precautions . . . . . . . . . . . ...

19

LEAK DETECTION DYE . . . . . . . . .

20

General Precautions . . . . . . . . . . . ...

20

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

21

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

21

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

21

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

24

Sealant or/and Lubricant . . . . . . . . . . .

24

PERIODIC MAINTENANCE . . . . . .

25

REFRIGERANT . . . . . . . . . . . . .

25

Collection and Charge . . . . . . . . . . . .

25

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

29

Maintenance of Lubricant Quantity . . . . . . ..

29

Lubricant Adjusting Procedure for Components
Replacement Except Compressor . . . . . . ...

29

Lubricant Adjusting Procedure for Compressor
Replacement . . . . . . . . . . . . . . ...

30

REFRIGERATION SYSTEM . . . . . . . .

32

Inspection . . . . . . . . . . . . . . . .

32

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

32

Refrigerant Leakages . . . . . . . . . . . ..

33

FLUORESCENT LEAK DETECTOR . . . .

34

Inspection . . . . . . . . . . . . . . . .

34

ELECTRICAL LEAK DETECTOR . . . . .

35

Inspection . . . . . . . . . . . . . . . .

35

REMOVAL AND INSTALLATION . . . ...

38

COMPRESSOR . . . . . . . . . . . . .

38

Exploded View . . . . . . . . . . . . . . .

38

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

38

Inspection . . . . . . . . . . . . . . . .

39

COOLER PIPE AND HOSE . . . . . . . ..

40

Exploded View . . . . . . . . . . . . . . .

40

LOW-PRESSURE FLEXIBLE HOSE . . . . . . .

40

LOW-PRESSURE FLEXIBLE HOSE : Removal
and Installation . . . . . . . . . . . . . .

40

HIGH-PRESSURE FLEXIBLE HOSE . . . . . .

41

HA-2

HIGH-PRESSURE FLEXIBLE HOSE : Removal
and Installation . . . . . . . . . . . . . ...

41

HIGH-PRESSURE PIPE 1 . . . . . . . . . . .

42

HIGH-PRESSURE PIPE 1 : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . ..

42

LOW-PRESSURE PIPE 2 . . . . . . . . . . .

43

LOW-PRESSURE PIPE 2 : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . ..

43

LOW-PRESSURE PIPE 1 AND HIGH-PRESSURE
PIPE 2 . . . . . . . . . . . . . . . . . ....

44

LOW-PRESSURE PIPE 1 AND HIGH-PRES-
SURE PIPE 2 : Removal and Installation . . . ...

44

CONDENSER . . . . . . . . . . . . .

47

Exploded View . . . . . . . . . . . . . ....

47

CONDENSER . . . . . . . . . . . . . . ....

47

CONDENSER : Removal and Installation . . . ..

47

CONDENSER PIPE ASSEMBLY . . . . . . . ..

48

CONDENSER PIPE ASSEMBLY : Removal and
Installation . . . . . . . . . . . . . . . ..

48

LIQUID TANK . . . . . . . . . . . . . . ....

49

LIQUID TANK : Removal and Installation . . . ...

49

REFRIGERANT PRESSURE SENSOR . . . . ....

50

REFRIGERANT PRESSURE SENSOR : Remov-
al and Installation . . . . . . . . . . . . ....

50

HEATER & COOLING UNIT ASSEMBLY . . .

51

Exploded View . . . . . . . . . . . . . ....

51

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

53

HEATER & COOLING UNIT ASSEMBLY : Re-
moval and Installation . . . . . . . . . . . .

53

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

55

HEATER CORE : Removal and Installation . . ...

55

EVAPORATOR . . . . . . . . . . . . . . .

55

EVAPORATOR : Removal and Installation . . ....

55

EXPANSION VALVE . . . . . . . . . . . . .

56

EXPANSION VALVE : Removal and Installation ....

56

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

57

Exploded View . . . . . . . . . . . . . ....

57

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

57

BLOWER UNIT : Removal and Installation . . ....

57

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

58

BLOWER MOTOR : Removal and Installation . ...

58

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

59

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

59

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

59

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

59

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

59

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

59

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

59

VK50VE

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

60

DIAGNOSIS AND REPAIR WORKFLOW . . .

60

Work Flow . . . . . . . . . . . . . . . ...

60

SYSTEM DESCRIPTION . . . . . . ...

61

REFRIGERATION SYSTEM . . . . . . . ..

61

System Diagram . . . . . . . . . . . . . .

61

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

61

Component Parts Location . . . . . . . . . .

62

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

63

SYMPTOM DIAGNOSIS . . . . . . .

64

REFRIGERATION SYSTEM SYMPTOMS . .

64

Trouble Diagnosis For Unusual Pressure . . . ...

64

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

64

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

67

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

67

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

67

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

67

Precaution for Procedure without Cowl Top Cover ...

68

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

68

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

68

Refrigerant Connection . . . . . . . . . . ...

69

Service Equipment . . . . . . . . . . . . ..

72

COMPRESSOR . . . . . . . . . . . . .

75

General Precautions . . . . . . . . . . . ...

75

LEAK DETECTION DYE . . . . . . . . ...

76

General Precautions . . . . . . . . . . . ...

76

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

77

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

77

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

77

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

80

Sealant or/and Lubricant . . . . . . . . . . .

80

PERIODIC MAINTENANCE . . . . . ...

81

REFRIGERANT . . . . . . . . . . . . .

81

Collection and Charge . . . . . . . . . . .

81

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

85

Maintenance of Lubricant Quantity . . . . . . .

85

Lubricant Adjusting Procedure for Components
Replacement Except Compressor . . . . . . ..

85

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Lubricant Adjusting Procedure for Compressor
Replacement . . . . . . . . . . . . . . ...

86

REFRIGERATION SYSTEM . . . . . . . ..

88

Inspection . . . . . . . . . . . . . . . .

88

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

88

Refrigerant Leakages . . . . . . . . . . . ..

89

FLUORESCENT LEAK DETECTOR . . . . .

90

Inspection . . . . . . . . . . . . . . . .

90

ELECTRICAL LEAK DETECTOR . . . . . ..

91

Inspection . . . . . . . . . . . . . . . .

91

REMOVAL AND INSTALLATION . . . ...

94

COMPRESSOR . . . . . . . . . . . . ..

94

Exploded View . . . . . . . . . . . . . .

94

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

94

Inspection . . . . . . . . . . . . . . . .

95

COOLER PIPE AND HOSE . . . . . . . ...

96

Exploded View . . . . . . . . . . . . . .

96

LOW-PRESSURE FLEXIBLE HOSE . . . . . .

96

LOW-PRESSURE FLEXIBLE HOSE : Removal
and Installation . . . . . . . . . . . . . .

96

HIGH-PRESSURE FLEXIBLE HOSE . . . . . .

97

HIGH-PRESSURE FLEXIBLE HOSE : Removal
and Installation . . . . . . . . . . . . . .

97

HIGH-PRESSURE PIPE 1 . . . . . . . . . . .

98

HIGH-PRESSURE PIPE 1 : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . ..

98

LOW-PRESSURE PIPE 2 . . . . . . . . . . ..

99

LOW-PRESSURE PIPE 2 : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . ..

99

LOW-PRESSURE PIPE 3 . . . . . . . . . .

100

LOW-PRESSURE PIPE 3 : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .

100

LOW-PRESSURE PIPE 1 AND HIGH-PRESSURE
PIPE 2 . . . . . . . . . . . . . . . . . ..

101

LOW-PRESSURE PIPE 1 AND HIGH-PRES-
SURE PIPE 2 : Removal and Installation . . . ..

101

CONDENSER . . . . . . . . . . . . ...

104

Exploded View . . . . . . . . . . . . . ..

104

CONDENSER . . . . . . . . . . . . . . ...

104

CONDENSER : Removal and Installation . . . .

104

CONDENSER PIPE ASSEMBLY . . . . . . .

105

CONDENSER PIPE ASSEMBLY : Removal and
Installation . . . . . . . . . . . . . . . .

105

LIQUID TANK . . . . . . . . . . . . . . ..

106

LIQUID TANK : Removal and Installation . . . ..

106

REFRIGERANT PRESSURE SENSOR . . . . ...

107

REFRIGERANT PRESSURE SENSOR : Remov-
al and Installation . . . . . . . . . . . . ...

107

HEATER & COOLING UNIT ASSEMBLY . ..

108

Exploded View . . . . . . . . . . . . . ...

108

HEATER & COOLING UNIT ASSEMBLY . . . ...

110

HEATER & COOLING UNIT ASSEMBLY : Re-
moval and Installation . . . . . . . . . . .

110

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

112

HEATER CORE : Removal and Installation . . ..

112

EVAPORATOR . . . . . . . . . . . . . .

112

EVAPORATOR : Removal and Installation . . ...

112

EXPANSION VALVE . . . . . . . . . . . ...

113

EXPANSION VALVE : Removal and Installation ...

113

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

114

Exploded View . . . . . . . . . . . . . ...

114

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

114

BLOWER UNIT : Removal and Installation . . ...

114

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

115

BLOWER MOTOR : Removal and Installation . ..

115

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

116

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

116

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

116

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

116

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

116

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

116

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

116

HA-4

< BASIC INSPECTION >

[VQ35HR]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005249877

DETAILED FLOW

1.

LISTEN TO CUSTOMER COMPLAINT

Listen to customer complaint. (Get detailed information about the conditions and environment when the symp-
tom occurs.)

>> GO TO 2.

2.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to

HAC-5, "WITHOUT ACCS : Description & Inspection"

(WITHOUT ACCS) or

HAC-8, "WITH ACCS : Description & Inspection"

(WITH ACCS).

>> GO TO 3.

3.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis [Refer to

HAC-154, "Diagnosis Chart By Symptom"

below].

>> GO TO 4.

4.

REPAIR OR REPLACE

Repair or replace the specific parts.

>> GO TO 5.

5.

FINAL CHECK

Final check.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 3.