Nissan Maxima. Instruction — part 706

HA-50

< SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Compressor

INFOID:0000000009465959

Oil

INFOID:0000000009465960

Refrigerant

INFOID:0000000009465961

Model

VALEO

Type

DKS-17D

Displacement

175 cm

3

(10.68 in

3

) / revolution

Cylinder bore

× stroke

30.5 mm (1.201 in) x 24 mm (0.94 in)

Direction of rotation

Clockwise (viewed from drive end)

Drive belt

Poly V 7-grooves

Name

NISSAN A/C System Oil Type S or equivalent

Capacity

Total in system

150 m (5.03 US fl oz, 5.03 lmp fl oz)

Compressor (service part) charging amount

Refer to

HA-31, "Oil Adjusting Procedure for Compressor Re-

placement"

.

Type

HFC-134a (R-134a)

Capacity

0.55

± 0.025 kg (1.21 ± 0.055 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

WITH COLOR DISPLAY

BASIC INSPECTION . . . . . . . . .

5

INSPECTION AND ADJUSTMENT . . . . . .

5

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

5

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

6

Foot Position Setting Trimmer . . . . . . . . ...

7

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

7

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

8

SYSTEM DESCRIPTION . . . . . . . ..

9

COMPRESSOR CONTROL FUNCTION . . . .

9

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

9

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

9

AUTOMATIC AIR CONDITIONER SYSTEM . .

11

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

11

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

11

Air Conditioner LAN Control System . . . . . ...

13

MODE DOOR CONTROL SYSTEM . . . . ...

16

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

16

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

16

AIR MIX DOOR CONTROL SYSTEM . . . .

18

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

18

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

18

INTAKE DOOR CONTROL SYSTEM . . . .

20

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

20

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

20

BLOWER MOTOR CONTROL SYSTEM . . ...

22

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

22

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

22

MAGNET CLUTCH CONTROL SYSTEM . . ..

24

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

24

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

24

CAN COMMUNICATION SYSTEM . . . . ...

25

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

25

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

26

CONSULT Function . . . . . . . . . . . . .

26

DTC/CIRCUIT DIAGNOSIS . . . . . . .

30

U1000 CAN COMM CIRCUIT . . . . . . ...

30

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

30

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

30

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

30

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

31

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

31

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

31

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

31

B257B, B257C AMBIENT SENSOR . . . . .

32

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

32

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

32

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

33

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

34

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

35

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

35

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

35

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

36

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

37

B2581, B2582 INTAKE SENSOR . . . . . .

38

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

38

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

38

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

38

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

39

B2630, B2631 SUNLOAD SENSOR . . . . .

41

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

41

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

41

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

42

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

43

HAC-2

B2632, B2633 AIR MIX DOOR MOTOR
(DRIVER SIDE) . . . . . . . . . . . . ..

44

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

44

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

44

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

45

B2634, B2635 AIR MIX DOOR MOTOR (PAS-
SENGER SIDE) . . . . . . . . . . . . ..

46

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

46

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

46

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

47

B2636, B2637, B2638, B2639, B2654, B2655
MODE DOOR MOTOR . . . . . . . . . ..

48

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

48

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

48

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

49

B263D, B263E, B263F INTAKE DOOR MO-
TOR . . . . . . . . . . . . . . . . .

51

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

51

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

51

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

52

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

53

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

53

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

53

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

53

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

57

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

57

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

57

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

57

POWER SUPPLY AND GROUND CIRCUIT . .

60

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

60

A/C AUTO AMP. : Description . . . . . . . ....

60

A/C AUTO AMP. : Component Function Check . .

60

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

60

A/C AND AV SWITCH ASSEMBLY . . . . . . ..

61

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

61

A/C AND AV SWITCH ASSEMBLY : Diagnosis
Procedure . . . . . . . . . . . . . . . ...

62

ECU DIAGNOSIS INFORMATION . . . ..

63

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

63

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

63

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

64

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

64

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

65

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

67

AIR CONDITIONER CONTROL . . . . . .

67

Wiring Diagram - With Color Display . . . . . ..

67

SYMPTOM DIAGNOSIS . . . . . . . .

80

INSUFFICIENT COOLING . . . . . . . . .

80

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

80

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

82

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

84

INSUFFICIENT HEATING . . . . . . . . .

86

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

86

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

89

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

89

MEMORY FUNCTION DOES NOT OPERATE ...

91

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

91

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

92

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

92

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

92

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

92

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

92

Precautions For Refrigerant System Service . . ..

93

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

96

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

98

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

98

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

98

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

98

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

98

REMOVAL AND INSTALLATION . . . .

100

CONTROL UNIT . . . . . . . . . . . ...

100

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

100

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

101

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

101

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

102

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

102

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

103

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

103

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

104

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

104

REFRIGERANT PRESSURE SENSOR . . ...

105

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

105

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

106

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

106

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

107

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

107

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

107

MODE DOOR MOTOR : Removal and Installation .

107

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

107

HAC-3

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor (Driver Side) . . . . ..

107

AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor (Passenger Side) . . ..

107

WITH MONOCHROME DISPLAY

BASIC INSPECTION . . . . . . . . .

108

INSPECTION AND ADJUSTMENT . . . . ..

108

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

108

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

109

Foot Position Setting Trimmer . . . . . . . ...

110

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

110

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

111

SYSTEM DESCRIPTION . . . . . . ...

112

COMPRESSOR CONTROL FUNCTION . . ..

112

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

112

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

112

AUTOMATIC AIR CONDITIONER SYSTEM ...

114

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

114

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

114

Air Conditioner LAN Control System . . . . . .

116

MODE DOOR CONTROL SYSTEM . . . . .

119

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

119

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

119

AIR MIX DOOR CONTROL SYSTEM . . . ..

121

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

121

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

121

INTAKE DOOR CONTROL SYSTEM . . . ..

123

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

123

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

123

BLOWER MOTOR CONTROL SYSTEM . . .

125

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

125

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

125

MAGNET CLUTCH CONTROL SYSTEM . .

127

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

127

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

127

CAN COMMUNICATION SYSTEM . . . . ..

128

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

128

DIAGNOSIS SYSTEM (HVAC) . . . . . .

129

CONSULT Function . . . . . . . . . . . ..

129

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

133

U1000 CAN COMM CIRCUIT . . . . . . ...

133

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

133

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

133

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

133

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

134

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

134

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

134

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

134

B257B, B257C AMBIENT SENSOR . . . ...

135

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

135

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

135

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

136

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

137

B2578, B2579 IN-VEHICLE SENSOR . . .

138

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

138

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

138

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

139

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

140

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

141

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

141

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

141

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

141

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

142

B2630, B2631 SUNLOAD SENSOR . . . ...

144

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

144

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

144

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

145

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

146

B2632, B2633 AIR MIX DOOR MOTOR
(DRIVER SIDE) . . . . . . . . . . . ...

147

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

147

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

147

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

148

B2634, B2635 AIR MIX DOOR MOTOR (PAS-
SENGER SIDE) . . . . . . . . . . . ...

149

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

149

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

149

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

150

B2636, B2637, B2638, B2639, B2654, B2655
MODE DOOR MOTOR . . . . . . . . .

152

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

152

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

152

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

153

B263D, B263E, B263F INTAKE DOOR MO-
TOR . . . . . . . . . . . . . . . . .

155

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

155

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

155

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

156

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

157

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

157

Component Function Check . . . . . . . .

157

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

157

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

161

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

161

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

161

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

161

A/C SWITCH ASSEMBLY SIGNAL CIRCUIT .

164