Infiniti QX56 (Z62). Manual - part 777

 

  Index      Infiniti     Infiniti QX56 (Z62) - service repair manual 2011 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  775  776  777  778   ..

 

 

Infiniti QX56 (Z62). Manual - part 777

 

 

REAR A/C UNIT

HA-49

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

5.

Pull out heater core (1) from rear A/C unit assembly.

INSTALLATION

Note the following item, and install in the reverse order of removal.
NOTE:
Refer to 

CO-9, "Refilling"

 when filling radiator with engine coolant.

EXPANSION VALVE

EXPANSION VALVE : Removal and Installation

INFOID:0000000006276192

REMOVAL

1.

Remove rear A/C unit assembly. Refer to 

HA-47, "REAR A/C UNIT ASSEMBLY : Removal and Installa-

tion"

.

2.

Disassembly rear A/C unit assembly.

3.

Remove mounting bolts, and then disconnect rear expansion valve assembly from rear evaporator pipe
assembly and rear cooler pipe assembly.

INSTALLATION

Note the following items, and install in the reverse order of removal.

CAUTION:

• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Check for leakages when recharging refrigerant. Refer to 

HA-18, "Leak Test"

.

JMIIA0685ZZ

HA-50

< SERVICE DATA AND SPECIFICATIONS (SDS) 

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Compressor

INFOID:0000000006276197

Lubricant

INFOID:0000000006276198

Refrigerant

INFOID:0000000006276199

Engine Idling Speed

INFOID:0000000006276200

Refer to 

EC-538, "Idle Speed"

.

Belt Tension

INFOID:0000000006276201

Refer to 

EM-20, "Tension Adjustment"

.

Model

VALEO THERMAL SYSTEMS JAPAN make

DSK-17D

Type

Fixation displacement swash plate

Displacement

cm

3

 (cu in)/rev

Maximum

175 (10.7)

Direction of rotation

Clockwise (viewed from clutch)

Drive belt

Poly V

Disc to pulley clearance
mm (in)

Standard

0.3 – 0.6 (0.012 – 0.024)

Name

UV Luminaus Oil Type S (DH-PS)

Capacity

m   (Imp  fl  oz)

Total in system

210 (7.1)

Compressor (service part) charging 
amount

210 (7.1)

Type

HFC-134a (R-134a)

Capacity
kg (lb)

1.05 (2.32)

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 CONDITIONING

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

5

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

5

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

5

SYSTEM DESCRIPTION  ..............................

6

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

6

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ............................................................................
..

6

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Component Parts Location  ...........................
..

6

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Component Description  ................................
..

7

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ............................................................................
..

8

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Component Parts Location  ...........................
..

9

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Component Description  ................................

10

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ..........................................................................

10

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Component Parts Location ..........................

11

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Component Description ...............................

11

Aspirator ..................................................................

12

Front Blower Motor ..................................................

12

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

13

Refrigerant Pressure Sensor ...................................

13

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

14

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ............................................................................

14

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : System Diagram  ...........................................

14

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : System Description  .......................................

14

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Air Flow Control  ............................................

15

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Air Inlet Control  .............................................

16

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Air Outlet Control  ..........................................

17

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Compressor Control ......................................

17

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Door Control ..................................................

18

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Control .....................................

21

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Fail-safe  ........................................................

21

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ............................................................................

22

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : System Diagram  ...........................................

23

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : System Description  .......................................

23

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Air Flow Control  ............................................

24

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Air Outlet Control  ..........................................

25

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Door Control ..................................................

26

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Control .....................................

27

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ...........................................................................

27

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : System Diagram  ..........................................

28

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : System Description ......................................

28

HAC-2

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Automatic Intake Control (Exhaust Gas / 
Outside Odor Detecting Mechanism)  ....................
.

28

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Plasmacluster Control ................................
.

29

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

30

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ..........................................................................
.

30

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Switch Name and Function  .........................
.

30

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ..........................................................................
.

35

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Switch Name and Function  .........................
.

35

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) .........................................................................
.

37

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Switch Name and Function  ........................
.

37

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

39

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

39

CONSULT-III Function  ...........................................

39

ECU DIAGNOSIS INFORMATION ..............

42

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

42

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

42

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

45

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

45

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

47

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

47

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

48

AUTOMATIC AIR CONDITIONING SYSTEM ...

48

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

48

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

60

DIAGNOSIS AND REPAIR WORK FLOW  ........

60

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

60

OPERATION INSPECTION ...............................

62

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ..........................................................................
.

62

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Work Procedure  ..........................................
.

62

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ..........................................................................
.

64

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Work Procedure  ..........................................
.

64

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) .........................................................................
.

66

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Work Procedure  .........................................
.

66

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

68

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ...........................................................................

68

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Setting Trimmer (Front)  ..........

68

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Foot Position Setting Trimmer ......................

68

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Inlet Port Memory Function (FRE) ................

69

FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Inlet Port Memory Function (REC)  ...............

69

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ...........................................................................

69

REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Setting Trimmer (Rear)  ...........

69

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ..........................................................................

70

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Exhaust Gas / Outside Odor Detecting 
Sensor Sensitivity Adjustment Function ..................

70

ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Auto Intake Switch Interlocking Movement 
Change Function .....................................................

70

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

72

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

72

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

72

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

72

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

72

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

73

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

73

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

73

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

73

B2578, B2579 FRONT IN-VEHICLE SENSOR ...

74

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

74

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

74

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

75

B257B, B257C AMBIENT SENSOR  .................

77

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

77

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

77

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

78

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

80

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

80

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

80

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

81

B262A, B262B, B2657, B2658 EXHAUST 
GAS/OUTSIDE ODOR DETECTING SENSOR 

...

83

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

83

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

83

 

 

 

 

 

 

 

Content   ..  775  776  777  778   ..