Infiniti QX56 (Z62). Manual - part 937

MWI-2

DIAGNOSIS SYSTEM (COMBINATION 
METER) ..............................................................

29

On Board Diagnosis Function .................................

29

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

30

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

35

COMBINATION METER  ....................................

35

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

35

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

42

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

43

IPDM E/R  ...........................................................

44

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

44

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

45

METER SYSTEM  ...............................................

45

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

45

CLOCK ...............................................................

55

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

55

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

57

DIAGNOSIS AND REPAIR WORKFLOW 
(METER SYSTEM) .............................................

57

Work flow  ................................................................

57

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

59

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

59

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

59

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

59

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

59

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

60

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

60

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

60

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

60

B2205 VEHICLE SPEED  ...................................

61

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

61

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

61

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

61

B2267 ENGINE SPEED  .....................................

62

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

62

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

62

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

62

B2268 WATER TEMP ........................................

63

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

63

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

63

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

63

POWER SUPPLY AND GROUND CIRCUIT  .....

64

COMBINATION METER  ...........................................

64

COMBINATION METER : Diagnosis Procedure  ....

64

TRIP RESET AND ILLUMINATION CON-
TROL SWITCH SIGNAL CIRCUIT  ....................

65

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

65

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

66

TRIP COMPUTER SWITCH SIGNAL CIRCUIT 

...

67

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

67

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

68

FUEL LEVEL SENSOR SIGNAL CIRCUIT  .......

69

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

69

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

69

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

70

OIL PRESSURE SWITCH SIGNAL CIRCUIT ...

71

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

71

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

71

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

71

WASHER LEVEL SWITCH SIGNAL CIRCUIT ...

73

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

73

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

73

A/C AUTO AMP. CONNECTION RECOGNI-
TION SIGNAL CIRCUIT  ....................................

74

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

74

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

75

THE FUEL GAUGE INDICATOR DOES NOT 
OPERATE ..........................................................

75

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

75

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

75

THE TRIP RESET AND ILLUMINATION CON-
TROL SWITCH IS INOPERATIVE  ....................

76

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

76

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

76

THE TRIP COMPUTER SWITCH IS INOPER-
ATIVE .................................................................

77

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

77

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

77

THE OIL PRESSURE WARNING LAMP 
DOES NOT TURN ON .......................................

78

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

78

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

78

THE OIL PRESSURE WARNING LAMP 
DOES NOT TURN OFF .....................................

79

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

79

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

79

THE PARKING BRAKE RELEASE WARNING 
CONTINUES DISPLAYING, OR DOES NOT 
DISPLAY ............................................................

80

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

80

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

80

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THE LOW WASHER FLUID WARNING CON-
TINUES DISPLAYING, or DOES NOT DIS-
PLAY ..................................................................

81

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

81

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

81

THE DOOR OPEN WARNING CONTINUES 
DISPLAYING, OR DOES NOT DISPLAY  ..........

82

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

82

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

82

THE AMBIENT TEMPERATURE DISPLAY IS 
INCORRECT .......................................................

83

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

83

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

83

NORMAL OPERATING CONDITION .................

84

INFORMATION DISPLAY  .........................................

84

INFORMATION DISPLAY : Description ..................

84

REMOVAL AND INSTALLATION  ...............

85

COMBINATION METER  ...................................

85

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

85

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

85

Disassembly and Assembly .....................................

85

TRIP RESET AND ILLUMINATION CON-
TROL SWITCH ..................................................

86

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

86

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

86

TRIP COMPUTER SWITCH ..............................

87

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

87

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

87

CLOCK ..............................................................

88

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

88

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

88

MWI-4

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

INFOID:0000000006369687

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

MWI

PREPARATION

MWI-5

< PREPARATION >

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PREPARATION

PREPARATION

Commercial Service Tools

INFOID:0000000006222202

Tool name

Description

Power tool

Loosening screws

PBIC0191E