service INFINITI QX56 2011 Factory Service Manual

PCS-54
< BASIC INSPECTION >[POWER DISTRIBUTION SYSTEM]
DIAGNOSIS AND REPAIR WORK FLOW
1.GET INFORMATION ABOUT SYMPTOM
Get detailed information from the customer about the symptom (the condition and the environment when the
incident/malfunction occurs).
>> GO TO 2.
2.CHECK DTC
1. Check DTC for BCM and IPDM E/R.
2. Perform the following procedure if DTC is displayed.
- Record DTC and freeze frame data (Pri nt them out with CONSULT-III.)
- Erase DTC.
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
3. Check related service bulletins for information.
Are any symptoms described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3.
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.
3.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in the “DATA MO NITOR” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in the “DATA MO NITOR ” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
5.PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the display ed DTC, and then check that DTC is detected again.
At this time, always connect CONSULT-III to the vehicle, and check diagnostic results in real time.
If two or more DTCs are detected, refer to BCS-56, "
DTCInspectionPriorityChart", and determine trouble
diagnosis order.
NOTE:
Perform Component Function Check if DTC Confirmati on Procedure is not included in Service Manual. This
simplified check procedure is an effective alternativ e, although DTC cannot be detected during this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation
Procedure.
Is DTC detected?
YES >> GO TO 7.
NO >> Refer to GI-40, "
Intermittent Incident".
6.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 7.
7.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.
Revision: 2010 May2011 QX56

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ELECTRICAL & POWER CONTROL
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CONTENTS
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
PRECAUTION ................
...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tools .......................................... ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Circuit Breaker .................................................... ......5
Battery .......................................................................5
Harness Connector ...................................................5
Standardized Relay ...................................................8
WIRING DIAGRAM ......................................11
POWER SUPPLY ROUTING CIRCUIT .......... ....11
Wiring Diagram - BATTERY POWER SUPPLY - ....11
Wiring Diagram - BATTERY POWER SUPPLY
FUSIBLE LINK No. K - ........................................ ....
29
Wiring Diagram - BATTERY POWER SUPPLY
FUSIBLE LINK No. S - ............................................
33
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 6 - ...........................................................
37
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 7 - ...........................................................
43
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 9 - ...........................................................
46
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 10 - .........................................................
51
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 35 - .........................................................
54
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 43 - .........................................................
60
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 46 - .........................................................
64
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 47 - ..................................................... ....
67
Wiring Diagram - ACCESSORY POWER SUP-
PLY - ........................................................................
80
Wiring Diagram - ACCESSORY POWER SUP-
PLY FUSE No. 19 - .................................................
83
Wiring Diagram - ACCESSORY POWER SUP-
PLY FUSE No. 20 - .................................................
86
Wiring Diagram - IGNITION POWER SUPPLY - . ....89
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 3 - ....................................................... ..
105
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 4 - ....................................................... ..
109
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 37 - ..................................................... ..
115
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 55 - ..................................................... ..
121
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 57 - ..................................................... ..
123
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 61 - ..................................................... ..
126
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 80 - ..................................................... ..
129
OPTION HARNESS ........................................133
Wiring Diagram .................................................... ..133
FUSE BLOCK - JUNCTION BOX (J/B) ..........140
Fuse, Connector and Terminal Arrangement ........140
FUSE, FUSIBLE LINK AND RELAY BOX ......141
Fuse and Fusible Link Arrangement ......................141
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ..............
143
Fuse, Connector and Terminal Arrangement ........143
HARNESS LAYOUT .......................................144
How To Read Harness Layout ............................ ..144
Outline ...................................................................145
Engine Room Harness ..........................................146
Engine Control Harness ........................................148
Revision: 2010 May2011 QX56

PG-2
Main Harness ........................................................149
Body Harness ........................................................150
Chassis Harness ...................................................152
Door Harness ........................................................153
Room Lamp Harness .............................................158
BASIC INSPECTION ..................................159
BATTERY INSPECTI ON ................................ .159
How to Handle Battery ......................................... ..159
Work Flow ..............................................................161
FUSE INSPECTION .........................................162
How To Check ..................................................... ..162
FUSIBLE LINK INSPECTION ..........................163
How To Check ..................................................... ..163
REMOVAL AND INSTALLATION .............164
BATTERY ....................................................... ..164
Exploded View ..................................................... .164
Removal and Installation .......................................164
BATTERY TERMINAL WITH FUSIBLE LINK ..165
Exploded View ......................................................165
Removal and Installation .......................................165
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
166
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
166
Battery .................................................................. .166
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PRECAUTIONSPG-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006275744
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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.
Revision: 2010 May2011 QX56

PG-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006288131
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-48087)
Battery Service Center Tests battery.
For operating instructions, refer to Technical
Service Bulletin and Battery Service Center
User Guide.
WKIA5280E
Revision: 2010 May2011 QX56

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BATTERY INSPECTIONPG-161
< BASIC INSPECTION >
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CHARGING THE BATTERY
CAUTION:
 Never “quick charge” a fully discharged battery.
 Keep the battery away from open
flame while it is being charged.
 When connecting the charger, connect the leads first, then turn on the charger. Never turn on the
charger first, as this may cause a spark.
 If battery electrolyte temperature rises above 55 °C (131 °F), stop charging. Always charge battery at
a temperature below 55 °C (131 °F).
Charging Rates
Do not charge at more than 50 ampere rate.
NOTE:
The ammeter reading on your battery charger will automat ically decrease as the battery charges. This indi-
cates that the voltage of the battery is increasing norma lly as the state of charge improves. The charging amps
indicated above refer to initial charge rate.
 If, after charging, the specific gravity of any two ce lls varies more than 0.050, the battery should be replaced.
Work FlowINFOID:0000000006288755
TROUBLE DIAGNOSIS WITH BATTERY SERVICE CENTER
For battery testing, use Battery Service Center (J-48087) . For details and operating instructions, refer to Tech-
nical Service Bulletin and/or Battery Service Center User Guide.
− 12 (10) −0.028
− 18 (0) −0.032
Battery electrolyte temperature [
°C ( °F)] Add to specific gravity reading
Corrected specific gravity Approximate charge condition
1.260 - 1.280 Fully charged
1.230 - 1.250 3/4 charged
1.200 - 1.220 1/2 charged
1.170 - 1.190 1/4 charged
1.140 - 1.160 Almost discharged1.110 - 1.130 Completely discharged
Amps Time 50 1 hour
25 2 hours
10 5 hours5 10 hours
Revision: 2010 May2011 QX56

PG-164
< REMOVAL AND INSTALLATION >
BATTERY
REMOVAL AND INSTALLATION
BATTERY
Exploded ViewINFOID:0000000006275779
Removal and InstallationINFOID:0000000006275780
REMOVAL
1. Remove cover of battery positive terminal.
2. Loosen battery terminal nuts, and disconnect both battery cables from battery terminals.
CAUTION:
When disconnecting, disconnect the battery cable from the negative terminal first.
3. Remove battery fix frame mounting nuts and battery fix frame.
4. Remove battery.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
When connecting, connect the battery cable to the positive terminal first.
Reset electronic systems as necessary. Refer to GI-65, "
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL : Required Procedure After Battery Disconnection".
1 : Battery fix frame
Refer to GI-4, "
Components" for symbols in the figure.
JSMIA0238GB
Revision: 2010 May2011 QX56

PG-166
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
BatteryINFOID:0000000006275783
Ty p e11 5 D 3 1 R
20 hour rate capacity [V – Ah] 12 – 82
Cold cranking current (For reference value) [A] 782
Revision: 2010 May2011 QX56

PWC-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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POWER WINDOW CONTROL SYSTEM
PRECAUTION ................ ...............................4
PRECAUTIONS .............................................. .....4
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
4
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
4
SYSTEM DESCRIPTION ..............................6
COMPONENT PARTS ................................... .....6
Component Parts Location ................................ ......6
Component Description .............................................7
SYSTEM ..............................................................8
System Diagram ................................................. ......8
System Description ...................................................8
Fail-safe ..................................................................10
DIAGNOSIS SYSTEM (BCM) ............................11
COMMON ITEM ..................................................... ....11
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
11
RETAIND PWR ...................................................... ....12
RETAIND PWR : CONSULT-III Function (BCM -
RETAINED PWR) ...................................................
12
ECU DIAGNOSIS INFORMATION ..............13
BCM (BODY CONTROL MODULE) ............... ....13
List of ECU Reference ........................................ ....13
POWER WINDOW MAIN SWITCH ....................14
Reference Value ................................................. ....14
Fail-safe ..................................................................15
FRONT POWER WINDOW SWITCH (PAS-
SENGER SIDE) ..................................................
16
Reference Value ................................................. ....16
Fail-safe ..................................................................17
REAR POWER WINDOW SWITCH LH ............18
Reference Value .................................................. ....18
Fail-safe ...................................................................19
REAR POWER WINDOW SWITCH RH ............20
Reference Value ......................................................20
Fail-safe ...................................................................21
WIRING DIAGRAM ......................................22
POWER WINDOW SYSTEM .............................22
Wiring Diagram .................................................... ....22
BASIC INSPECTION ...................................30
DIAGNOSIS AND REPAIR WORKFLOW ........30
Work Flow ............................................................ ....30
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL ...................
31
Description ...............................................................31
Work Procedure .......................................................31
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ................................................
32
Description ...............................................................32
Work Procedure .......................................................32
SYSTEM INITIALIZATION ................................33
Description ........................................................... ....33
Work Procedure .......................................................33
CHECK ANTI-PINCH FUNCTION .....................34
Description ...............................................................34
Work Procedure .......................................................34
DTC/CIRCUIT DIAGNOSIS .........................35
POWER SUPPLY AND GROUND CIRCUIT ....35
POWER WINDOW MAIN SWITCH ........................ ....35
POWER WINDOW MAIN SWITCH : Diagnosis
Procedure ................................................................
35
Revision: 2010 May2011 QX56

PWC-4
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006237825
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether 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 inopera tive, 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 NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation after Battery Disconnect
INFOID:0000000006217263
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56