Nissan Sentra. Instruction — part 538

HA-46

< 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:0000000009756322

COMPRESSOR

OIL

REFRIGERANT

Model

SANDEN

Type

PXC14 (swashplate)

Displacement

137.2 cm

3

(8.37 in

3

) / revolution

Direction of rotation

Clockwise

Drive belt

Poly V 6-grooves

Name

Genuine NISSAN A/C System Oil Type DH-PS or equivalent

Capacity

Total in system

90 m (3.0 US fl oz, 3.2 lmp fl oz)

Compressor (service part) charging amount

Refer to

HA-26, "Oil Adjusting Procedure for Compressor Re-

placement"

.

Type

HFC-134a (R-134a)

Capacity

0.45

± 0.05 kg (0.992 ± 0.110 lb)

HAC-1

VENTILATION, HEATER & AIR CONDITIONER

C

D

E

F

G

H

J

K

L

M

SECTION

HAC

A

B

HAC

N

O

P

CONTENTS

HEATER & AIR CONDITIONING CONTROL SYSTEM

AUTOMATIC AIR CONDITIONER

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

5

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

5

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

5

Precaution for Work . . . . . . . . . . . . ..

5

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

5

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

6

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

8

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

8

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

8

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

8

SYSTEM DESCRIPTION . . . . . . . ..

9

COMPONENT PARTS . . . . . . . . . .

9

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

9

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

10

SYSTEM . . . . . . . . . . . . . . . .

12

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

12

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

12

Air Flow Control . . . . . . . . . . . . . ...

13

Air Inlet Control . . . . . . . . . . . . . ...

14

Air Outlet Control . . . . . . . . . . . . . .

15

Compressor Control . . . . . . . . . . . .

15

Door Control . . . . . . . . . . . . . . .

15

Temperature Control . . . . . . . . . . . ...

20

Fail-safe . . . . . . . . . . . . . . . . ..

20

OPERATION . . . . . . . . . . . . . ...

21

Switch Name and Function . . . . . . . . . .

21

DIAGNOSIS SYSTEM (A/C AUTO AMP.) . . .

24

Description . . . . . . . . . . . . . . . ..

24

CONSULT Function (HVAC) . . . . . . . . ...

24

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

28

COMMON ITEM . . . . . . . . . . . . . . .

28

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

28

AIR CONDITIONER . . . . . . . . . . . . ...

29

AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . ...

29

DIAGNOSIS SYSTEM (IPDM E/R) . . . . ...

30

Diagnosis Description . . . . . . . . . . . ..

30

CONSULT Function (IPDM E/R) . . . . . . . .

31

ECU DIAGNOSIS INFORMATION . . . ..

34

A/C AUTO AMP. . . . . . . . . . . . ...

34

Reference Value . . . . . . . . . . . . . ..

34

DTC Inspection Priority Chart . . . . . . . ...

37

DTC Index . . . . . . . . . . . . . . . ...

38

ECM, IPDM E/R, BCM . . . . . . . . . ...

40

List of ECU Reference . . . . . . . . . . . .

40

WIRING DIAGRAM . . . . . . . . . ..

41

AUTOMATIC AIR CONDITIONING SYSTEM ...

41

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

41

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

51

DIAGNOSIS AND REPAIR WORKFLOW . .

51

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

51

OPERATION INSPECTION . . . . . . . ..

53

Work Procedure . . . . . . . . . . . . . ...

53

SYSTEM SETTING . . . . . . . . . . ...

55

Temperature Setting Trimmer . . . . . . . . .

55

Inlet Port Memory Function (FRE) . . . . . . ...

55

Inlet Port Memory Function (REC) . . . . . . ..

56

Target Evaporator Temp Upper Limit . . . . . ..

56

HAC-2

DOOR MOTOR STARTING POSITION RE-
SET . . . . . . . . . . . . . . . . .

57

Description . . . . . . . . . . . . . . . ..

57

Work Procedure . . . . . . . . . . . . . ..

57

DTC/CIRCUIT DIAGNOSIS . . . . . . .

58

U1000 CAN COMM CIRCUIT . . . . . . .

58

Description . . . . . . . . . . . . . . . ..

58

DTC Logic . . . . . . . . . . . . . . . ...

58

Diagnosis Procedure . . . . . . . . . . . ..

58

U1010 CONTROL UNIT (CAN) . . . . . . .

59

Description . . . . . . . . . . . . . . . ..

59

DTC Logic . . . . . . . . . . . . . . . ...

59

Diagnosis Procedure . . . . . . . . . . . ..

59

B2578, B2579 IN-VEHICLE SENSOR . . . ...

60

DTC Logic . . . . . . . . . . . . . . . ...

60

Diagnosis Procedure . . . . . . . . . . . ..

60

Component Inspection . . . . . . . . . . ....

61

B257B, B257C AMBIENT SENSOR . . . . .

63

DTC Logic . . . . . . . . . . . . . . . ...

63

Diagnosis Procedure . . . . . . . . . . . ..

63

Component Inspection . . . . . . . . . . ....

64

B2581, B2582 INTAKE SENSOR . . . . . ..

66

DTC Logic . . . . . . . . . . . . . . . ...

66

Diagnosis Procedure . . . . . . . . . . . ..

66

Component Inspection . . . . . . . . . . ....

67

B2630, B2631 SUNLOAD SENSOR . . . . .

69

DTC Logic . . . . . . . . . . . . . . . ...

69

Diagnosis Procedure . . . . . . . . . . . ..

69

Component Inspection . . . . . . . . . . ....

70

B27A2, B27A3, B27A4, B27A5 AIR MIX
DOOR MOTOR (DRIVER SIDE) . . . . . .

72

DTC Logic . . . . . . . . . . . . . . . ...

72

Diagnosis Procedure . . . . . . . . . . . ..

72

Component Inspection . . . . . . . . . . ....

73

B27AA, B27AB, B27AC, B27AD AIR MIX
DOOR MOTOR (PASSENGER SIDE) . . . ...

74

DTC Logic . . . . . . . . . . . . . . . ...

74

Diagnosis Procedure . . . . . . . . . . . ..

74

Component Inspection . . . . . . . . . . ....

75

B27A6, B27A7, B27A8, B27A9 MODE DOOR
MOTOR . . . . . . . . . . . . . . . ..

77

DTC Logic . . . . . . . . . . . . . . . ...

77

Diagnosis Procedure . . . . . . . . . . . ..

77

Component Inspection . . . . . . . . . . ....

78

B27A0, B27A1 INTAKE DOOR MOTOR . . ..

79

DTC Logic . . . . . . . . . . . . . . . ...

79

Diagnosis Procedure . . . . . . . . . . . ..

79

Component Inspection (PBR) . . . . . . . . .

81

Component Inspection (Motor) . . . . . . . ...

82

POWER SUPPLY AND GROUND CIRCUIT . .

83

A/C AUTO AMP. . . . . . . . . . . . . . .

83

A/C AUTO AMP. : Diagnosis Procedure . . . . .

83

A/C SWITCH ASSEMBLY . . . . . . . . . . .

83

A/C SWITCH ASSEMBLY : Component Function
Check . . . . . . . . . . . . . . . . . ..

83

A/C SWITCH ASSEMBLY : Diagnosis Procedure ...

84

A/C SWITCH ASSEMBLY SIGNAL CIRCUIT ...

85

Diagnosis Procedure . . . . . . . . . . . ...

85

A/C ON SIGNAL . . . . . . . . . . . .

86

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

86

Diagnosis Procedure . . . . . . . . . . . ...

86

BLOWER FAN ON SIGNAL . . . . . . . ..

88

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

88

Diagnosis Procedure . . . . . . . . . . . ...

88

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

90

Diagnosis Procedure . . . . . . . . . . . ...

90

Component Inspection (Blower Motor) . . . . ...

92

Component Inspection (Blower Motor Relay) . . .

93

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

94

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

94

Diagnosis Procedure . . . . . . . . . . . ...

94

ECV (ELECTRICAL CONTROL VALVE) . . ..

95

Diagnosis Procedure . . . . . . . . . . . ...

95

Component Inspection . . . . . . . . . . .

96

SYMPTOM DIAGNOSIS . . . . . . .

97

HEATER AND AIR CONDITIONING SYSTEM
CONTROL SYMPTOMS . . . . . . . . .

97

Diagnosis Chart By Symptom . . . . . . . . .

97

INSUFFICIENT COOLING . . . . . . . . .

99

Description . . . . . . . . . . . . . . . ..

99

Diagnosis Procedure . . . . . . . . . . . ...

99

INSUFFICIENT HEATING . . . . . . . .

101

Description . . . . . . . . . . . . . . .

101

Diagnosis Procedure . . . . . . . . . . . .

101

COMPRESSOR DOES NOT OPERATE . . ..

102

Description . . . . . . . . . . . . . . .

102

Diagnosis Procedure . . . . . . . . . . . .

102

REMOVAL AND INSTALLATION . . . .

104

A/C SWITCH ASSEMBLY . . . . . . . .

104

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

104

A/C AUTO AMP. . . . . . . . . . . . ...

105

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

105

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

105

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

106

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

106

HAC-3

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

107

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

107

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

108

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

108

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

109

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

109

REFRIGERANT PRESSURE SENSOR . . ...

110

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

110

DOOR MOTOR . . . . . . . . . . . . .

111

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

111

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

112

INTAKE DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .

112

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

112

MODE DOOR MOTOR : Removal and Installation ..

112

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

112

AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor RH . . . . . . . . .

112

AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor LH . . . . . . . . ..

112

POWER TRANSISTOR . . . . . . . . .

113

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

113

MANUAL AIR CONDITIONER

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

114

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

114

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

114

Precaution for Work . . . . . . . . . . . ..

114

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

114

Precaution for Service Equipment . . . . . . .

115

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

117

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

117

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

117

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

117

SYSTEM DESCRIPTION . . . . . . ...

118

COMPONENT PARTS . . . . . . . . . .

118

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

118

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

119

SYSTEM . . . . . . . . . . . . . . ...

121

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

121

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

121

Air Flow Control . . . . . . . . . . . . . .

122

Air Inlet Control . . . . . . . . . . . . . .

122

Air Outlet Control . . . . . . . . . . . . ...

122

Compressor Control . . . . . . . . . . . ..

122

Door Control . . . . . . . . . . . . . . ..

123

Temperature Control . . . . . . . . . . . .

126

OPERATION . . . . . . . . . . . . ...

127

Switch Name and Function . . . . . . . . .

127

DIAGNOSIS SYSTEM (BCM) (WITH INTELLI-
GENT KEY SYSTEM) . . . . . . . . . .

129

COMMON ITEM . . . . . . . . . . . . . ...

129

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

129

AIR CONDITIONER . . . . . . . . . . . . .

130

AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . .

130

DIAGNOSIS SYSTEM (BCM) (WITHOUT IN-
TELLIGENT KEY SYSTEM) . . . . . . ...

131

COMMON ITEM . . . . . . . . . . . . . ...

131

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

131

AIR CONDITIONER . . . . . . . . . . . . .

132

AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . .

132

DIAGNOSIS SYSTEM (IPDM E/R) (WITH IN-
TELLIGENT KEY SYSTEM) . . . . . . ...

133

Diagnosis Description . . . . . . . . . . .

133

CONSULT Function (IPDM E/R) . . . . . . ...

134

DIAGNOSIS SYSTEM (IPDM E/R) (WITHOUT
INTELLIGENT KEY SYSTEM) . . . . . .

137

Diagnosis Description . . . . . . . . . . .

137

CONSULT Function (IPDM E/R) . . . . . . ...

138

ECU DIAGNOSIS INFORMATION . . .

141

A/C AUTO AMP. . . . . . . . . . . . .

141

Reference Value . . . . . . . . . . . . .

141

ECM, IPDM E/R, BCM . . . . . . . . . .

144

List of ECU Reference . . . . . . . . . . ...

144

WIRING DIAGRAM . . . . . . . . .

145

MANUAL AIR CONDITIONING SYSTEM . ...

145

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

145

MANUAL HEATER SYSTEM . . . . . . ..

152

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

152

BASIC INSPECTION . . . . . . . . .

156

DIAGNOSIS AND REPAIR WORKFLOW . ..

156

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

156

OPERATION INSPECTION . . . . . . .

157

Work Procedure . . . . . . . . . . . . . .

157

DTC/CIRCUIT DIAGNOSIS . . . . . ...

159