diagram INFINITI QX56 2008 Factory Service Manual

PCS-8
< FUNCTION DIAGNOSIS >[IPDM E/R]
POWER CONTROL SYSTEM
POWER CONTROL SYSTEM
System DiagramINFOID:0000000001696483
System DescriptionINFOID:0000000001696484
COOLING FAN CONTROL
IPDM E/R controls the cooling fan according to the status of the cooling fan speed request signal received
from ECM via CAN communication. Refer to
LAN-4, "
System Description".
ALMIA0111GB
Revision: March 2010 2008 QX56

PCS
SIGNAL BUFFER SYSTEMPCS-9
< FUNCTION DIAGNOSIS > [IPDM E/R]
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SIGNAL BUFFER SYSTEM
System DiagramINFOID:0000000001696485
System DescriptionINFOID:0000000001696486
IPDM E/R reads the status of the oi
l pressure switch and transmits the oil pressure switch signal to BCM via
CAN communication. Refer to LAN-4, "
System Description".
AWNIA0174GB
Revision: March 2010 2008 QX56

PCS-10
< FUNCTION DIAGNOSIS >[IPDM E/R]
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTIO
N CONTROL SYSTEM
System DiagramINFOID:0000000001696487
System DescriptionINFOID:0000000001696488
OUTLINE
• IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-
ing to the vehicle status.
• IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com-
munication.
Normal mode (wake-up)- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.
Low power consumption mode (sleep)- Low power consumption control is active.
- CAN transmission is stopped.
SLEEP MODE ACTIVATION
• IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of theconditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communica-
tion.
- Front wiper fail-safe operation
- Outputting signals to actuators
- Switches or relays operating
- Auto active test is starting
- Emergency OFF
- Output requests are being received from control units via CAN communication.
• IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep
wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.
WAKE-UP OPERATION
• IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep
wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a
sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.
- Ignition switch ON
- An output request is received from a control unit via CAN communication.
AWMIA0082GB
Revision: March 2010 2008 QX56

PCS-26
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DI
STRIBUTION MODULE ENGINE ROOM)
Wiring Diagram
INFOID:0000000001696499
ALMWA0086GB
Revision: March 2010 2008 QX56

PG
PG-1
ELECTRICAL & POWER CONTROL
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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 — .....17
Wiring Diagram — Ignition Power Supply — ....... ....21
Fuse .........................................................................29
Fusible Link .............................................................29
GROUND ...........................................................30
Ground Distribution ..................................................30
HARNESS .........................................................40
Harness Layout ................................................... ....40
ELECTRICAL UNITS LOCATION ....................62
Electrical Units Location ..........................................62
HARNESS CONNECTOR .................................65
Description ...............................................................65
STANDARDIZED RELAY .................................68
Description ...............................................................68
FUSE BLOCK - JUNCTION BOX (J/B) ............70
Terminal Arrangement .............................................70
FUSE, FUSIBLE LINK AND RELAY BOX ........71
Terminal Arrangement .............................................71
ON-VEHICLE REPAIR .................................73
BATTERY ..........................................................73
Removal and Installation ..................................... ....73
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
74
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
74
Battery ................................................................. ....74
Revision: March 2010 2008 QX56

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POWER SUPPLY ROUTING CIRCUITPG-9
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COMPONENT DIAGNOSIS
POWER SUPPLY ROUTING CIRCUIT
Wiring Diagram —Battery Power Supply —INFOID:0000000001744669
AAMWA0090GB
Revision: March 2010
2008 QX56

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POWER SUPPLY ROUTING CIRCUITPG-17
< COMPONENT DIAGNOSIS >
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Wiring Diagram —Acces
sory Power Supply —INFOID:0000000004807908
ABMWA0065GB
Revision: March 2010 2008 QX56

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POWER SUPPLY ROUTING CIRCUITPG-21
< COMPONENT DIAGNOSIS >
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Wiring Diagram —Ignition Power Supply —INFOID:0000000004807909
ABMWA0066GB
Revision: March 2010
2008 QX56

PWC-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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SECTION PWC
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CONTENTS
POWER WINDOW CONTROL SYSTEM
BASIC INSPECTION ....... .............................4
DIAGNOSIS AND REPAIR WORKFLOW ..... .....4
Work Flow ........................................................... ......4
FUNCTION DIAGNOSIS ...............................5
POWER WINDOW SYST EM ...............................5
System Diagram ................................................. ......5
System Description ...................................................5
Component Parts Location ......................................8
Component Description .............................................8
DIAGNOSIS SYSTEM (BCM) ............................10
COMMON ITEM ..................................................... ....10
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
10
RETAINED PWR .......................................................10
RETAINED PWR : CONSULT-III Function (BCM -
RETAINED PWR) ...................................................
10
COMPONENT DIAGNOSIS .........................12
POWER SUPPLY AND GROUND CIRCUIT .. ....12
POWER WINDOW MAIN SWITCH ........................ ....12
POWER WINDOW MAIN SWITCH : Description ....12
POWER WINDOW MAIN SWITCH : Component
Function Check .......................................................
12
POWER WINDOW MAIN SWITCH : Diagnosis
Procedure ................................................................
12
FRONT POWER WINDOW SWITCH .................... ....13
FRONT POWER WINDOW SWITCH : Descrip-
tion ..........................................................................
13
FRONT POWER WINDOW SWITCH : Compo-
nent Function Check ...............................................
13
FRONT POWER WINDOW SWITCH : Diagnosis
Procedure ................................................................
13
REAR POWER WINDOW SWITCH ....................... ....15
REAR POWER WINDOW SWITCH : Description ....15
REAR POWER WINDOW SWITCH : Component
Function Check ........................................................
15
REAR POWER WINDOW SWITCH : Diagnosis
Procedure ................................................................
15
REAR POWER WINDOW SWITCH : Component
Inspection ................................................................
16
POWER WINDOW MOTOR ..............................17
DRIVER SIDE ......................................................... ....17
DRIVER SIDE : Description .....................................17
DRIVER SIDE : Component Function Check ..........17
DRIVER SIDE : Diagnosis Procedure .....................17
DRIVER SIDE : Component Inspection ...................18
PASSENGER SIDE ....................................................18
PASSENGER SIDE : Descript ion ............................18
PASSENGER SIDE : Component Function Check
....
18
PASSENGER SIDE : Diagnosis Procedure ............18
PASSENGER SIDE : Component Inspection ..........19
REAR LH ................................................................ ....20
REAR LH : Description ............................................20
REAR LH : Component Function Check .................20
REAR LH : Diagnosis Procedure .............................20
REAR LH : Component Inspection ..........................21
REAR RH ............................................................... ....21
REAR RH : Description ...........................................21
REAR RH : Component Function Check .................21
REAR RH : Diagnosis Procedure ............................21
REAR RH : Component Inspection .........................22
ENCODER .........................................................23
DRIVER SIDE ......................................................... ....23
DRIVER SIDE : Description .....................................23
DRIVER SIDE : Component Function Check ..........23
DRIVER SIDE : Diagnosis Procedure .....................23
PASSENGER SIDE ....................................................25
Revision: March 2010 2008 QX56

PWC-2
PASSENGER SIDE : Description ...........................25
PASSENGER SIDE : Compo nent Function Check
...
25
PASSENGER SIDE : Diagnosis Procedure ........ ...25
REAR LH ................................................................ ...28
REAR LH : Description ...........................................28
REAR LH : Component Function Check ................28
REAR LH : Diagnosis Procedure ............................28
REAR RH ............................................................... ...30
REAR RH : Description ..........................................31
REAR RH : Component Function Check ................31
REAR RH : Diagnosis Procedure ...........................31
DOOR SWITCH .................................................34
Description ..............................................................34
Component Function Check ...................................34
Diagnosis Procedure ..............................................34
Component Inspection ............................................35
DOOR KEY CYLINDER SWITCH ......................36
Description ........................................................... ...36
Component Function Check ...................................36
Diagnosis Procedure ..............................................36
Component Inspection ............................................37
POWER WINDOW SERIAL LINK .....................39
POWER WINDOW MAIN SWITCH ........................ ...39
POWER WINDOW MAIN SWITCH : Description ...39
POWER WINDOW MAIN SWITCH : Component
Function Check .......................................................
39
POWER WINDOW MAIN SWITCH : Diagnosis
Procedure ...............................................................
39
FRONT POWER WINDOW SWITCH ..................... ...40
FRONT POWER WINDOW SWITCH : Descrip-
tion ..........................................................................
40
FRONT POWER WINDOW SWITCH : Compo-
nent Function Check ...............................................
40
FRONT POWER WINDOW SWITCH : Diagnosis
Procedure ...............................................................
41
REAR POWER WINDOW SWITCH ....................... ...42
REAR POWER WINDOW SWITCH : Power Win-
dow Serial Link Check Rear LH or RH ...................
42
POWER WINDOW LOCK SWITCH ...................43
Description ........................................................... ...43
Component Function Check ...................................43
REAR POWER VENT WINDOW SWITCH
CIRCUIT CHECK ...............................................
44
Description ........................................................... ...44
Diagnosis Procedure ..............................................44
REAR POWER VENT WINDOW MOTOR LH
CIRCUIT CHECK ...............................................
45
Description ........................................................... ...45
Diagnosis Procedure ..............................................45
REAR POWER VENT WINDOW MOTOR RH
CIRCUIT CHECK ...............................................
46
Description ........................................................... ...46
Diagnosis Procedure ...............................................46
REAR POWER VENT WINDOW RELAY
(OPEN) CHECK .................................................
47
Description ........................................................... ...47
Diagnosis Procedure ...............................................47
REAR POWER VENT WINDOW RELAY
(CLOSE) CHECK ...............................................
49
Description ........................................................... ...49
Diagnosis Procedure ...............................................49
ECU DIAGNOSIS .......................................51
BCM (BODY CONTROL MODULE) ............... ...51
Reference Value .................................................. ...51
Terminal Layout ......................................................53
Physical Values .......................................................53
Wiring Diagram .......................................................59
Fail Safe .................................................................62
DTC Inspection Priority Chart ...............................63
DTC Index ..............................................................63
POWER WINDOW MAIN SWITCH ...................65
Reference Value .................................................. ...65
Wiring Diagram .......................................................67
Fail Safe .................................................................78
FRONT POWER WINDOW SWITCH ................80
Reference Value .................................................. ...80
Wiring Diagram .......................................................82
Fail Safe .................................................................93
SYMPTOM DIAGNOSIS ............................95
NONE OF THE POWER WINDOWS CAN BE
OPERATED USING ANY SWITCH ................ ...
95
Diagnosis Procedure ............................................ ...95
DRIVER SIDE POWER WINDOW ALONE
DOES NOT OPERATE ......................................
96
Diagnosis Procedure ............................................ ...96
FRONT PASSENGER SIDE POWER WIN-
DOW ALONE DOES NOT OPERATE ...............
97
Diagnosis Procedure ............................................ ...97
REAR LH SIDE POWER WINDOW ALONE
DOES NOT OPERATE ......................................
98
Diagnosis Procedure ............................................ ...98
REAR RH SIDE POWER WINDOW ALONE
DOES NOT OPERATE ......................................
99
Diagnosis Procedure ............................................ ...99
ANTI-PINCH SYSTEM DOES NOT OPERATE
NORMALLY (DRIVER SIDE) ...........................
100
Diagnosis Procedure ............................................ .100
Revision: March 2010 2008 QX56