diagram INFINITI QX56 2011 Factory Service Manual

HOW TO READ WIRING DIAGRAMSGI-9
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Connector SymbolsINFOID:0000000006282193
Most of connector symbols in wiring diagrams are shown from the terminal side.
 Connector symbols shown from the terminal side are enclosed by a single line and followed by the direction mark.
 Connector symbols shown from the harness side are enclosed by
a double line and followed by the direction mark.
 Certain systems and components, especially those related to
OBD, may use a new style slide-locking type harness connector.
For description and how to disconnect, refer to PG section,
“Description”, “HARNESS CONNECTOR”.
 Male and female terminals Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.
SAIA0257E
SGI363
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GI-10
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HOW TO READ WIRING DIAGRAMS
Sample/Wiring Diagram -Example-
INFOID:0000000006282194
Each section includes wiring diagrams.
Description
JCAWA0150GB
Number Item Description 1 Power supply  This means the power supply of fusible link or fuse.
2 Fuse  “/” means the fuse.
3 Current rating of fus-
ible link/fuse  This means the current rating of the fusible link or fuse.
4 Number of fusible link/
fuse
 This means the number of fusible link or fuse location.
5 Fusible link  “X” means the fusible link.
6 Connector number  Alphabetic characters show to which harness the connector is placed.
 Numeric characters show the identification number of connectors.
7Switch  This shows that continuity exists between terminals 1 and 2 when the switch is in the A
position. Continuity exists between terminals 1 and 3 when the switch is in the B position.
8 Circuit (Wiring)  This means the wiring.
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SWITCH POSITIONS
Switches are shown in wiring diagrams as if the vehicle is in the “normal” condition.
A vehicle is in the “normal” condition when:
 ignition switch is “OFF”,
 doors, hood and trunk lid/back door are closed,
 pedals are not depressed, and
 parking brake is released.
MULTIPLE SWITCH
The continuity of multiple switch is described in two ways as shown below.
 The switch chart is used in schematic diagrams.
9 Shielded line  The line enclosed by broken line circle shows shield wire.
10 Connectors  This means that a transmission line bypasses two connectors or more.
11 Option abbreviation  This means the vehicle specifications which layouts the circuit between “ ”.
12 Relay  This shows an internal representation of the relay.
13 Optional splice  The open circle shows that the splice is optional depending on vehicle application.
14 Splice  The shaded circle “ ” means the splice.
15 System branch  This shows that the circuit is branched to other systems.
16 Page crossing  This circuit continues to an adjacent page.
17 Component name  This shows the name of a component.
18 Terminal number  This means the terminal number of a connector.
19 Ground (GND)  This shows the ground connection.
20 Explation of option
description  This shows a explanation of the option abbreviation used on the same page.
Number Item Description
SGI860
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GI-12
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HOW TO READ WIRING DIAGRAMS
 The switch diagram is used in wiring diagrams.
Connector InformationINFOID:0000000006282195
Description
JSAIA0017GB
Number Item Description1 Connector number  Alphabetic characters show to which harness the connector is placed.
 Numeric characters show the identification number of connectors.
2 Connector type  This means the connector number. Refer to PG-144, "
How To Read Harness Layout".
3 Terminal number  This means the terminal number of a connector.
JCAWA0152GB
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4 Wire color  This shows a code for the color of the wire.
B = Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light Green
BG = Beige BR = Brown
OR or O = Orange
P = Pink
PU or V (Violet) = Purple
GY or GR = Gray
SB = Sky Blue
CH = Dark Brown
DG = Dark Green
 When the wire color is striped, the base color is given first, followed by the stripe color as shown below:
Example: L/W = Blue with White Stripe
5 Connector  This means the connector information.
 This unit-side is described by the connector symbols.
Number Item Description
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SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-41
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lowing section illustrates ways to simulate the c onditions/environment under which the owner experiences an
electrical incident.
The section is broken into the six following topics: Vehicle vibration
 Heat sensitive
 Freezing
 Water intrusion
 Electrical load
 Cold or hot start up
Get a thorough description of the incident from the customer . It is important for simulating the conditions of the
problem.
VEHICLE VIBRATION
The problem may occur or become worse while driving on a rough road or when engine is vibrating (idle with
A/C on). In such a case, you will want to check for a vibration related condition. Refer to the following illustra-
tion.
Connector & Harness
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently
shake each connector and harness while monitoring the syst em for the incident you are trying to duplicate.
This test may indicate a loose or poor electrical connection.
Hint
Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector termi-
nals. A visual inspection may not reveal this without disconnecting the connector. If the problem occurs inter-
mittently, perhaps the problem is caused by corrosi on. It is a good idea to disconnect, inspect and clean the
terminals on related connectors in the system.
Sensor & Relay
Gently apply a slight vibration to sensors and relays in the system you are inspecting.
This test may indicate a loose or poorly mounted sensor or relay.
Engine Compartment
There are several reasons a vehicle or engine vibration could cause an electrical complaint. Some of the
things to check for are:
 Connectors not fully seated.
 Wiring harness not long enough and is being stressed due to engine vibrations or rocking.
 Wires laying across brackets or moving components.
 Loose, dirty or corroded ground wires.
 Wires routed too close to hot components.
To inspect components under the hood, start by verifyi ng the integrity of ground connections. (Refer to Ground
Inspection described later.) First check that the syst em is properly grounded. Then check for loose connection
by gently shaking the wiring or components as previous ly explained. Using the wiring diagrams inspect the
wiring for continuity.
Behind the Instrument Panel
An improperly routed or improperly clamped harness can become pinched during accessory installation. Vehi-
cle vibration can aggravate a harness which is routed along a bracket or near a screw.
Under Seating Areas
SGI839
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GI-48
< BASIC INSPECTION >
CONSULT-III/GST CHECKING SYSTEM
CONSULT-III/GST CHECKING SYSTEM
DescriptionINFOID:0000000006280856
 When CONSULT-III/GST is connected with a data link connector
(A) equipped on the vehicle side, it will communicate with the con-
trol unit equipped in the vehicle and then enable various kinds of
diagnostic tests.
 Refer to “CONSULT-III Software Operation Manual” for more infor- mation.
CONSULT-III Function a nd System Application*1INFOID:0000000006280857
1 : Instrument lower panel LH
JPAIA0769ZZ
Diagnostic test
mode Function
ENGINE
TRANSMISSION AIR BAG
METER/M&A
AUTO BACK DOOR BCM
AUTO DRIVE POS. ABS
IPDM E/R
ALL MODE AWD/4WD MULTI AV
ICC/ADAS SONAR
AIR PRESSURE MONITOR AFS (ADAPTIVE LIGHT)
PRECRASH SEAT BELT HVAC
LASER
LANE CAMERA
ACCELE PEDAL ACT
E–SUS
SIDE RADAR LEFT
SIDE RADAR RIGHT CAN GATEWAY
Work Support This mode
enables a
technician to
adjust some
devices fast-
er and more
accurately.xx - - - xxx - xxxxxx - xxx - xxx -
Self Diagnostic
Results Retrieve DTC
from ECU
and display
diagnostic
items.
xxxxxxxxxxxxxxxxxxxxxxxx
Data Monitor Monitor the
input/output
signal of the
control unit in
real time.xx - xxxxxxxxxxxxxxxxxxxx -
CAN Diagnosis This mode
displays a
network diag-
nosis result
about CAN
by a diagram.xxxxxxxxxxxx -xxxxxxxxxxx
CAN Diagnosis
Support Moni-
tor It monitors
the status of
CAN commu-
nication.
xx - xxxxxxxxx -xxxxxxxxxxx
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CONSULT-III/GST CHECKING SYSTEM
CONSULT-III/GST Data Link Connector (DLC) Circuit
INFOID:0000000006280858
INSPECTION PROCEDURE
If the CONSULT-III/GST cannot diagnose the system properly, check the following items.
NOTE:
The DDL1 and DDL2 circuits from DLC pins 12, 13, 14 and 15 may be connected to more than one system. A
short in a DDL circuit connected to a control unit in one system may affect CONSULT-III access to other sys-
tems.
If the GST cannot operate properly, check the circ uit based on the information of SAE J1962 and ISO 15031-
3.
Symptom Check item
CONSULT-III/GST cannot ac-
cess any system.  CONSULT-III/GST DLC power supply circuit (Terminal 8 and 16) and ground circuit (Terminal 4 and
5)
CONSULT-III cannot access in-
dividual system. (Other sys-
tems can be accessed.)  Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring
diagram for each system.)
 Open or short circuit between the system and CONSULT-III DLC (For detailed circuit, refer to wiring
diagram for each system.)
 Open or short circuit CAN communication line. Refer to LAN-18, "
Trouble Diagnosis Flow Chart".
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CONSULT-III/GST CHECKING SYSTEMGI-51
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Wiring Diagram - CONSULT- III/GST CHECKING SYSTEM -INFOID:0000000006280859
WITH ICC
JCAWM0358GB
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HA-1
VENTILATION, HEATER & AIR CONDITIONER
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CONTENTS
HEATER & AIR CONDITIONING SYSTEM
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Precaution for Procedure without Cowl Top Cover ......4
Precautions For Refrigerant System Service ............4
Service Equipment ....................................................6
PREPARATION ............................................9
PREPARATION .............................................. .....9
Special Service Tool ........................................... ......9
Commercial Service Tool ........................................12
Sealant or/and Lubricant .........................................12
SYSTEM DESCRIPTION .............................13
COMPONENT PARTS ................................... ....13
Component Parts Location .................................. ....13
Component Description ...........................................13
SYSTEM .............................................................14
System Diagram .................................................. ....14
System Description .................................................14
BASIC INSPECTION ...................................16
DIAGNOSIS AND REPAIR WORKFLOW ..... ....16
Work Flow ........................................................... ....16
REFRIGERANT ..................................................18
Description .......................................................... ....18
Leak Test ................................................................18
Recycle Refrigerant .................................................20
Charge Refrigerant ..................................................20
LUBRICANT ................................................... ....22
Description .......................................................... ....22
Inspection ............................................................ ....22
Perform Lubricant Return Operation .......................22
Lubricant Adjusting Procedure for Components
Replacement Except Compressor ...........................
22
Lubricant Adjusting Procedure for Compressor
Replacement ...........................................................
23
PERFORMANCE TEST ....................................25
Inspection ................................................................25
SYMPTOM DIAGNOSIS ..............................27
REFRIGERATION SYSTEM SYMPTOMS ........27
Trouble Diagnosis For Unusual Pressure ............ ....27
Symptom Table .......................................................27
NOISE ................................................................29
Symptom Table .......................................................29
REMOVAL AND INSTALLATION ...............30
COMPRESSOR .................................................30
Exploded View ..................................................... ....30
COMPRESSOR ..........................................................30
COMPRESSOR : Removal and Installation ............30
MAGNET CLUTCH ................................................ ....31
MAGNET CLUTCH : Removal and Installation of
Compressor Clutch ..................................................
31
Inspection ................................................................32
COOLER PIPE AND HOSE ..............................33
Exploded View .........................................................33
HIGH-PRESSURE FLEXIBLE HOSE ........................34
HIGH-PRESSURE FLEXIBLE HOSE : Removal
and Installation .................................................... ....
34
LOW-PRESSURE FLEXIBLE HOSE ..................... ....35
LOW-PRESSURE FLEXIBLE HOSE : Removal
and Installation ........................................................
35
HIGH-PRESSURE PIPE ............................................35
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