2008 INFINITI QX56 engine

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Page 3967 of 4083

INFINITI QX56 2008 Factory Service Manual BCM (BODY CONTROL MODULE)WT-21
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004291536
VALUES ON THE DIAGNOSIS TOOL
Monitor Ite

Page 3968 of 4083

INFINITI QX56 2008 Factory Service Manual WT-22
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
HEADLAMP SW1Headlamp switch OFF OFF
Headlamp switch 1st
ON
HEADLAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF

Page 3988 of 4083

INFINITI QX56 2008 Factory Service Manual WT-42
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004884205
The Supplemental Restraint S

WT-42
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004884205
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:0000000004884204
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: March 2010 2008 QX56

Page 3998 of 4083

INFINITI QX56 2008 Factory Service Manual WW-1
DRIVER CONTROLS
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SECTION WW
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CONTENTS
WIPER & WASHER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow

WW-1
DRIVER CONTROLS
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SECTION WW
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CONTENTS
WIPER & WASHER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
FUNCTION DIAGNOSIS ...............................4
FRONT WIPER AND WASHER SYSTEM ..... .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................7
Component Description ............................................7
REAR WIPER AND WASHER SYSTEM ............8
System Diagram .................................................. ......8
System Description ...................................................8
Component Parts Location ......................................10
Component Description ..........................................10
DIAGNOSIS SYSTEM (BCM) ............................11
COMMON ITEM ..................................................... ....11
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
11
WIPER ................................................................... ....11
WIPER : CONSULT-III Function (BCM - WIPER) ....11
DIAGNOSIS SYSTEM (IPDM E/R) .....................13
Diagnosis Description ......................................... ....13
CONSULT - III Function (IPDM E/R) .......................15
COMPONENT DIAGNOSIS .........................18
WIPER AND WASHER FUSE ........................ ....18
Description .......................................................... ....18
Diagnosis Procedure ...............................................18
FRONT WIPER MOTOR LO CIRCUIT ...............19
Component Function Check ................................ ....19
Diagnosis Procedure ...............................................19
FRONT WIPER MOTOR HI CIRCUIT ................21
Component Function Check ................................ ....21
Diagnosis Procedure ...............................................21
FRONT WIPER AUTO STOP SIGNAL CIR-
CUIT ..................................................................
23
Component Function Check ....................................23
Diagnosis Procedure ...............................................23
FRONT WIPER MOTOR GROUND CIRCUIT ...25
Diagnosis Procedure ...............................................25
WASHER SWITCH ............................................26
Description ...............................................................26
Component Inspection .............................................26
REAR WIPER MOTOR CIRCUIT ......................28
Component Function Check ....................................28
Diagnosis Procedure ...............................................28
REAR WIPER AUTO STOP SIGNAL CIRCUIT
...
30
Component Function Check ................................ ....30
Diagnosis Procedure ...............................................30
FRONT WIPER AND WASHER SYSTEM ........31
Wiring Diagram ........................................................31
REAR WIPER AND WASHER SYSTEM ..........35
Wiring Diagram ........................................................35
ECU DIAGNOSIS .........................................41
BCM (BODY CONTROL MODULE) .................41
Reference Value .................................................. ....41
Terminal Layout .......................................................43
Physical Values ................................................... ....43
Wiring Diagram ........................................................49
Fail Safe ..................................................................52
DTC Inspection Priority Chart ...............................53
DTC Index ...............................................................53
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
55
Revision: March 2010 2008 QX56

Page 4010 of 4083

INFINITI QX56 2008 Factory Service Manual DIAGNOSIS SYSTEM (IPDM E/R)WW-13
< FUNCTION DIAGNOSIS >
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DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000004874864
AUTO ACTIVE TEST
Description
In auto ac

Page 4038 of 4083

INFINITI QX56 2008 Factory Service Manual BCM (BODY CONTROL MODULE)WW-41
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004874892
VALUES ON THE DIAGNOSIS TOOL
Monitor Ite

Page 4039 of 4083

INFINITI QX56 2008 Factory Service Manual WW-42
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
HEADLAMP SW1Headlamp switch OFF OFF
Headlamp switch 1st
ON
HEADLAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF

Page 4050 of 4083

INFINITI QX56 2008 Factory Service Manual BCM (BODY CONTROL MODULE)WW-53
< ECU DIAGNOSIS >
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DTC Inspection Priority ChartINFOID:0000000004874897
If some DTCs are displayed at the same time, perform inspections o

BCM (BODY CONTROL MODULE)WW-53
< ECU DIAGNOSIS >
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DTC Inspection Priority ChartINFOID:0000000004874897
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000004874898
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
• 1 - 39: Displayed if any previous ma lfunction is present when current conditi on is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condi tion if the malfunction is detected again.
Display contents of CONSULT Fail-safe Cancellation
U1000: CAN COMM CIRCUIT I nhibit engine crankingWhen the BCM re-establishes communication with the other mod-
ules.
U1010: CONTROL UNIT (CAN) Inhibit engine cranking When the BCM re-start communicating with the other modules.
Priority DTC
1 • U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
2 • B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION
3 • C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL
4 • C1704: LOW PRESSURE FL
• C1705: LOW PRESSURE FR
• C1706: LOW PRESSURE RR
• C1707: LOW PRESSURE RL
• C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL
Revision: March 2010
2008 QX56

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