wheel INFINITI QX56 2010 Factory Service Manual

PCS
PCS-1
ELECTRICAL & POWER CONTROL
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SECTION PCS
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CONTENTS
POWER CONTROL SYSTEM
IPDM E/R
BASIC INSPECTION ....... .............................
2
DIAGNOSIS AND REPAIR WORKFLOW ..... .....2
Work Flow ........................................................... ......2
FUNCTION DIAGNOSIS ...............................5
RELAY CONTROL SYSTEM ......................... .....5
System Diagram .................................................. ......5
System Description ...................................................6
Component Parts Location ........................................7
POWER CONTROL SYSTEM .............................8
System Diagram .................................................. ......8
System Description ...................................................8
SIGNAL BUFFER SYSTEM ................................9
System Diagram .................................................. ......9
System Description ...................................................9
POWER CONSUMPTION CONTROL SYS-
TEM ....................................................................
10
System Diagram .................................................. ....10
System Description .................................................10
Component Parts Location ......................................11
DIAGNOSIS SYSTEM (IPDM E/R) .....................12
Diagnosis Description ......................................... ....12
CONSULT - III Function (IPDM E/R) .......................14
COMPONENT DIAGNOSIS .........................17
U1000 CAN COMM CIRCUIT ...........................17
Description ........................................................... ....17
DTC Logic ................................................................17
Diagnosis Procedure ...............................................17
POWER SUPPLY AND GROUND CIRCUIT ....18
Diagnosis Procedure ...............................................18
ECU DIAGNOSIS .........................................19
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
19
Reference Value .................................................. ....19
Terminal Layout .......................................................21
Physical Values ................................................... ....22
Wiring Diagram ........................................................27
Fail Safe ..................................................................30
DTC Index ...............................................................32
PRECAUTION ..............................................33
PRECAUTIONS .................................................33
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
33
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
33
REMOVAL AND INSTALLATION ...............35
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
35
Removal and Installation of IPDM E/R ................ ....35
Revision: April 20092010 QX56

PCS
PRECAUTIONSPCS-33
< PRECAUTION > [IPDM E/R]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005367635
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 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 SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 SR section.
• 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005367636
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56

PG
PG-1
ELECTRICAL & POWER CONTROL
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SECTION PG
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CONTENTS
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
PRECAUTION .......
........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Precaution for Power Generation Variable Voltage
Control System ..........................................................
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
BASIC INSPECTION ....................................5
BATTERY ....................................................... .....5
How to Handle Battery ........................................ ......5
Work Flow ........................................................... ......7
INSPECTION AND ADJUSTMENT .....................8
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ............................... ......
8
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Special Re-
pair Requirement ................................................. ......
8
COMPONENT DIAGNOSIS ..........................9
POWER SUPPLY ROUTING CIRCUIT .......... .....9
Wiring Diagram — Battery Power Supply — ....... ......9
Wiring Diagram — Accessory Power Supply — .....18
Wiring Diagram — Ignition Power Supply — ..........22
Fuse ........................................................................30
Fusible Link .............................................................30
GROUND ...........................................................31
Ground Distribution .............................................. ....31
HARNESS .........................................................41
Harness Layout ................................................... ....41
ELECTRICAL UNITS LOCATION ....................61
Electrical Units Location ..........................................61
HARNESS CONNECTOR .................................64
Description ...............................................................64
STANDARDIZED RELAY .................................67
Description ...............................................................67
FUSE BLOCK - JUNCTION BOX (J/B) ............69
Terminal Arrangement .............................................69
FUSE, FUSIBLE LINK AND RELAY BOX ........70
Terminal Arrangement .............................................70
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
72
IPDM E/R Terminal Arrangement - Type A .............72
IPDM E/R Terminal Arrangement - Type B .............73
ON-VEHICLE REPAIR .................................74
BATTERY ..........................................................74
Removal and Installation ..................................... ....74
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
75
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
75
Battery ................................................................. ....75
Revision: April 20092010 QX56

PG-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005260236
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 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses 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 Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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:0000000005260237
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56

PG-44
< COMPONENT DIAGNOSIS >
HARNESS
D2 M55 W/4 : Hazard switchD5 M207 B/3 : Console power socket
D4 M56 W/16 : To M201 C4 M208 BR/20 : To M69
A3 M57 — : Body ground C5 M209 W/2 : Center console area antenna (rear)
F2 M58 B/6 : Intake door motor C4 M210 GR/2 : Center console area antenna (front)
F3 M59 BR/2 : Glove box lamp C4 M212 W/6 : Rear heated seat switch LH
G3 M60 W/6 : Fuse block (J/B) C4 M213 BR/6 : Rear heated seat switch RH
C3 M61 — : Body ground Console switch sub-harness
F4 M62 B/2 : Front blower motor D4 M251 BR/20 : To M63
D4 M63 BR/20 : To M251 D4 M252 BR/6 : Front heated seat switch RH
D4 M64 BR/24 : To M202 C4 M253 GR/6 : VDC OFF switch
F2 M65 W/4 : To M301 C3 M255 W/6 : Front heated seat switch LH
G3 M66 B/1 : To E33 C4 M256 B/2 : A/T shift selector
C3 M69 BR/20 : To M208 D4 M258 GR/8 : Tow mode switch
A2 M70 W/40 : Intelligent key unit C4 M260 W/6 : Heated steering wheel switch
A2 M71 L/4 : Heated steering relay Optical sensor sub-harness
D3 M73 BR/6 : Back-up lamp relay F1 M301 W/4 : To M65
G3 M74 BR/20 : To D102 D1 M302 B/4 : Optical sensor
G3 M75 W/10 : To D101
A3 M76 W/6 : Electric brake (pre-wiring)
E2 M77 Y/4 : Front passenger air bag module
(service replacement)
Revision: April 20092010 QX56

PG
HARNESSPG-45
< COMPONENT DIAGNOSIS >
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ENGINE ROOM HARNESS
ABMIA1200GB
C4 E1 GR/2 : Ambient sensor
C5 E113 W/2 : Cooling fan motor
D3 E2 W/16 : To F32 E3 E114 B/6 : Delta stroke motor
C3 E3 B/2 : Horn D1 E116 W/2 : Condenser-2
C3 E4 Y/2 : Crash zone sensor D3 E117 GR/2 : Front wheel sensor RH
C1 E5 W/24 : To F14 D3 E118 B/2: IPDM E/R (intelligent power distribution
module engine room)
Revision: April 20092010 QX56

PG-46
< COMPONENT DIAGNOSIS >
HARNESS
D4 E6 B/8: Front combination lamp LH (with
daytime light system) C1 E119 W/16: IPDM E/R (intelligent power distribution
module engine room)
C2 E7 GR/2 : Fusible link box (battery) D1 E120 W/6: IPDM E/R (intelligent power distribution
module engine room)
C2 E9 — : Body ground E1 E121 BR/12: IPDM E/R (intelligent power distribution
module engine room)
D4 E11 B/8 : Front combination lamp LH (without
daytime light system) C1 E122 W/12: IPDM E/R (intelligent power distribution
module engine room)
D3 E12 B/5 : Stop lamp relay D1 E123 BR/8: IPDM E/R (intelligent power distribution
module engine room)
B2 E13 W/2 : Hood switch D1 E124 B/6: IPDM E/R (intelligent power distribution
module engine room)
D4 E14 — : Body ground F3 E125 B/47: ABS actuator and electric unit
(control unit)
C2 E15 — : Body ground D4 E126 — : Body ground
C1 E16 B/40 : ECM C2 E130 W/2 : Compressor motor relay
E4 E18 GR/2 : Front wheel sensor LH C3 E131 W/2 : Compressor motor relay
D1 E19 W/16 : To F33 D1 E134 GR/6 : ICC brake hold relay
E3 E21 GR/2 : Brake fluid level switch C2 E135 GR/2 : Transfer dropping resistor
E2 E23 GR/6 : Front wiper motor C1 E140 BR/6 : Trailer tow relay 2
D4 E24 — : Body ground B2 E153 W/2 : Transfer motor relay
F3 E25 BR/3 : Intelligent key warning buzzer B2 E154 W/2 : Transfer motor relay
C3 E27 BR/2 : Fusible link box (battery )D3 E156 L/4 : Trailer turn relay LH
C2 E30 /1 : Fusible link box (battery) D3 E157 L/4 : Trailer turn relay RH
E3 E31 B/3 : Front pressure sensor D5 E158 B/3 : Front sonar sensor LH outer
E3 E32 B/3 : Rear pressure sensor D5 E159 GR/3 : To E164
E1 E39 W/2 : To F34 B4 E160 GR/3 : To E165
D3 E40 B/3 : To E201 C3 E161 B/3 : Battery current sensor
D3 E41 SMJ : To C1 B4 E162 B/3 : Front sonar sensor LH inner
A4 E42 B/6 : ICC sensor C5 E163 B/3 : Front sonar sensor RH inner
E1 E46 B/5 : Transfer shift high relay D5 E164 GR/3 : To E159
D2 E47 B/5 : Transfer shift low relay A4 E165 GR/3 : To E160
C4 E48 B/3 : Refrigerant pressure sensor A3 E166 B/3 : Front sonar sensor RH outer
E3 E49 B/6 : Active booster Engine room sub-harness
D1 E69 L/4 : Transfer shut off relay D3 E201 B/3 : To E40
D5 E101 B/3 : Front turn/fog lamp LH C1 E202 /1 : Fusible link box (battery)
A4 E102 B/3 : Front turn/fog lamp RH C2 E203 — : Engine ground
C3 E103 B/5 : Daytime light relay C3 E204 /1 : Generator
D4 E105 BR/2 : Front and rear washer motor C3 E205 B/3 : Generator
E4 E106 BR/2 : Washer fluid level switch C3 E206 /1 : Generator
B3 E107 B/8 : Front combination lamp RH (without
daytime light system)
A3 E108 B/6 : Front combination lamp RH (with
daytime light system)
Revision: April 20092010 QX56

PG-50
< COMPONENT DIAGNOSIS >
HARNESS
CHASSIS HARNESS
AWMIA0113GB
G2 C1 SMJ : To E41C4 C10 BR/2 : Rear wheel sensor RH
B5 C2 B/7 : Trailer C4 C11 BR/2 : Rear wheel sensor LH
A3 C3 GR/8 : To C101 Rear sonar sensor sub-harness
C3 C4 GR/3 : Evap control system pressure sensor A4 C101 GR/8 : To C3
D2 C5 GR/5 : Fuel level sensor unit and fuel pump A3 C102 B/3 : Rear sonar sensor LH outer
Revision: April 20092010 QX56

PWC-3
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ANTI-PINCH SYSTEM DOES NOT OPERATE
NORMALLY (PASSENGER SIDE) ................ ..
103
Diagnosis Procedure ........................................... ..103
ANTI-PINCH SYSTEM DOES NOT OPERATE
NORMALLY (REAR LH SIDE) .........................
104
Diagnosis Procedure ........................................... ..104
ANTI-PINCH SYSTEM DOES NOT OPERATE
NORMALLY (REAR RH SIDE) ........................
105
Diagnosis Procedure ........................................... ..105
AUTO OPERATION DOES NOT OPERATE
BUT MANUAL OPERATES NORMALLY
(DRIVER SIDE) .................................................
106
Diagnosis Procedure .............................................106
AUTO OPERATION DOES NOT OPERATE
BUT MANUAL OPERATES NORMALLY
(PASSENGER SIDE) ...................................... ..
107
Diagnosis Procedure ........................................... ..107
AUTO OPERATION DOES NOT OPERATE
BUT MANUAL OPERATES NORMALLY
(REAR LH SIDE) ..............................................
108
Diagnosis Procedure ........................................... ..108
AUTO OPERATION DOES NOT OPERATE
BUT MANUAL OPERATES NORMALLY
(REAR RH SIDE) ..............................................
109
Diagnosis Procedure ........................................... ..109
POWER WINDOW RETAINED POWER OP-
ERATION DOES NOT OPERATE PROPERLY
..
110
Diagnosis Procedure ........................................... ..110
DOES NOT OPERATE BY KEY CYLINDER
SWITCH ...........................................................
111
Diagnosis Procedure ........................................... ..111
KEYLESS POWER WINDOW DOWN DOES
NOT OPERATE ...............................................
112
Diagnosis Procedure .............................................112
POWER WINDOW LOCK SWITCH DOES
NOT FUNCTION ..............................................
113
Diagnosis Procedure .............................................113
REAR POWER VENT WINDOWS DO NOT
OPERATE .......................................................
114
Diagnosis Procedure .............................................114
PRECAUTION ............................................115
PRECAUTIONS ...............................................115
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
115
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
115
ON-VEHICLE REPAIR ...............................117
POWER WINDOW MAIN SWITCH .................117
Removal and Installation ..................................... ..117
FRONT POWER WINDOW SWITCH ..............118
Removal and Installation .......................................118
REAR POWER WINDOW SWITCH ................119
Removal and Installation .......................................119
REAR POWER VENT WINDOW SWITCH .....120
Removal and Installation .......................................120
Revision: April 20092010 QX56

PRECAUTIONSPWC-115
< PRECAUTION >
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PWC
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005268965
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 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 SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 SR section.
• 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005268966
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56