belt INFINITI QX56 2009 Factory Service Manual

SEC-2
B2192, P1611 ID DISCORD, IMMU-ECM .........31
Description ........................................................... ...31
DTC Logic ...............................................................31
Diagnosis Procedure ..............................................31
B2193, P1612 CHAIN OF ECM-IMMU ..............33
Description ........................................................... ...33
DTC Logic ...............................................................33
Diagnosis Procedure ..............................................33
B2194 ID DISCORD IMMU-I-KEY .....................34
Description ........................................................... ...34
DTC Logic ...............................................................34
Diagnosis Procedure ..............................................34
B2552 INTELLIGENT KEY ................................35
Description ........................................................... ...35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
Special Repair Requirement ...................................35
B2590 ID DISCORD BCM-I-KEY .................... ...36
Description ........................................................... ...36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
P1610 LOCK MODE ..........................................37
Description ........................................................... ...37
DTC Logic ...............................................................37
Diagnosis Procedure ..............................................37
POWER SUPPLY AND GROUND CIRCUIT .....38
INTELLIGENT KEY UNIT ...................................... ...38
INTELLIGENT KEY UNIT : Diagnosis Procedure ...38
BCM ........................................................................ ...38
BCM : Diagnosis Procedure ...................................38
KEY CYLINDER SWITCH .................................40
Description ........................................................... ...40
Component Function Check ...................................40
Diagnosis Procedure ..............................................40
IGNITION KNOB SWITCH .................................42
Ignition Knob Switch Check ................................. ...42
HOOD SWITCH .................................................44
Diagnosis Procedure ..............................................44
HORN FUNCTION .............................................46
Symptom Table ................................................... ...46
VEHICLE SECURITY INDICATOR ....................47
Description ........................................................... ...47
Component Function Check .................................47
Diagnosis Procedure ..............................................47
ECU DIAGNOSIS ..................................... ...49
BCM (BODY CONTROL MODULE) ............... ...49
Reference Value .................................................. ...49
Terminal Layout ......................................................51
Physical Values .......................................................51
Wiring Diagram - VEHICLE SECURITY SYSTEM ...57
Wiring Diagram - IVIS .............................................68
Fail Safe .................................................................76
DTC Inspection Priority Chart ...............................77
DTC Index ..............................................................77
INTELLIGENT KEY UNIT ..................................79
Reference Value - Intelligent Key Unit ................. ...79
Reference Value - Steering Lock Solenoid .............82
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
83
Fail Safe .................................................................95
DTC Inspection Priority Chart ...............................95
DTC Index ..............................................................95
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
96
Reference Value .................................................. ...96
Terminal Layout ......................................................98
Physical Values .......................................................98
Fail Safe ...............................................................102
DTC Index ............................................................103
SYMPTOM DIAGNOSIS ...........................104
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ................... ..
104
Symptom Table .................................................... .104
VEHICLE SECURITY SYSTEM SYMPTOMS ..105
Symptom Table .....................................................105
INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS SYMPTOMS ...........................................
106
Symptom Table .................................................... .106
ON-VEHICLE MAINTENANCE .................107
PRE-INSPECTION FOR DIAGNOSTIC ......... ..107
Basic Inspection ................................................... .107
Vehicle Security Operation Check ........................107
PRECAUTION ...........................................109
PRECAUTIONS .............................................. ..109
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
109
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
109
ON-VEHICLE REPAIR ..............................111
VEHICLE SECURITY SYSTEM ...................... ..111
Removal and Installation .......................................111
Revision: December 20092009 QX56

PRECAUTIONSSEC-109
< PRECAUTION > [WITH INTELLIGENT KEY SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005852251
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:0000000005852252
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: December 20092009 QX56

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DRIVER INFORMATION & MULTIMEDIA
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CONTENTS
SONAR SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
Preliminary Check ............................................... ......5
FUNCTION DIAGNOSIS ...............................6
REAR SONAR SYSTEM ................................ .....6
System Diagram .................................................. ......6
System Description ...................................................6
Component Parts Location ........................................7
Component Description .............................................7
Self-Diagnosis Function ............................................7
FRONT AND REAR SONAR SYSTEM .......... ....10
System Diagram .................................................. ....10
System Description .................................................10
Component Parts Location ......................................11
Component Description ...........................................12
CONSULT-III Function (SONAR) ............................12
COMPONENT DIAGNOSIS .........................13
POWER SUPPLY AND GROUND CIRCUIT .. ....13
Diagnosis Procedure (With Rear Sonar System) ....13
Diagnosis Procedure (With Front and Rear Sonar
System) ............................................................... ....
13
SONAR SENSOR CIRCUIT INSPECTION ........15
Description .......................................................... ....15
Diagnosis Procedure (With Rear Sonar System) ....15
Diagnosis Procedure (With Front and Rear Sonar
System) ...................................................................
15
SONAR BUZZER CIRCUIT INSPECTION .........17
Description .......................................................... ....17
Diagnosis Procedure (With Rear Sonar System) ....17
Diagnosis Procedure (With Front and Rear Sonar
System) ...................................................................
17
Component Inspection ......................................... ....18
SONAR SYSTEM OFF SWITCH CIRCUIT IN-
SPECTION ........................................................
19
Description ........................................................... ....19
Diagnosis Procedure (With Rear Sonar System) ....19
Diagnosis Procedure (With Front and Rear Sonar
System) ............................................................... ....
19
Component Inspection .............................................20
ECU DIAGNOSIS .........................................21
SONAR CONTROL UNIT FOR REAR SONAR
SYSTEM ...................... ......................................
21
Reference Value .................................................. ....21
Wiring Diagram ........................................................23
DTC Index ...............................................................30
SONAR CONTROL UNIT FOR FRONT AND
REAR SONAR SYSTEM ...................................
31
Reference Value ......................................................31
Wiring Diagram ........................................................33
DTC Index ...............................................................44
SYMPTOM DIAGNOSIS ..............................45
SONAR SYSTEM SYMPTOMS ........................45
Symptom Table ................................................... ....45
PRECAUTION ..............................................46
PRECAUTION ...................................................46
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
46
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
46
PREPARATION ...........................................48
PREPARATION .................................................48
Commercial Service Tool .................................... ....48
Revision: December 20092009 QX56

SN-46
< PRECAUTION >
PRECAUTION
PRECAUTION
PRECAUTION
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005855116
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:0000000005855117
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: December 20092009 QX56

SR-1
RESTRAINTS
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CONTENTS
SRS AIRBAG
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 SRS "AIR BAG" and "SEAT BELT
PRE-TENSIONER" Service ......................................
3
Occupant Classification System Precaution .............3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
ON-VEHICLE REPAIR ..................................5
DRIVER AIR BAG MODULE .......................... .....5
Removal and Installation ...........................................5
SPIRAL CABLE ............................................. .....7
Removal and Installation ...........................................7
FRONT PASSENGER AIR BAG MODULE ......10
Removal and Installation ..................................... ....10
SIDE CURTAIN AIR BAG MODULE ................13
Removal and Installation .........................................13
CRASH ZONE SENSOR ...................................14
Removal and Installation ..................................... ....14
SIDE AIR BAG (SATELLITE) SENSOR ...........15
Removal and Installation .........................................15
FRONT SEAT BELT PRE-TENSIONER ...........16
Removal and Installation .........................................16
DIAGNOSIS SENSOR UNIT .............................17
Removal and Installation .........................................17
OCCUPANT CLASSIFICATION SYSTEM
CONTROL UNIT ................................................
19
Removal and Installation .........................................19
COLLISION DIAGNOSIS ..................................20
For Frontal Collision ................................................20
For Side and Rollover Collision ...............................22
Revision: December 20092009 QX56

SR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005867708
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:0000000005867709
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: December 20092009 QX56

PRECAUTIONSSR-3
< PRECAUTION >
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5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Precaution for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service
INFOID:0000000003775154
• Do not use electrical test equipment to check SRS ci rcuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min- utes.
For approximately 3 minutes after the terminals are remov ed, it is still possible for the air bags and seat belt
pre-tensioners to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
• The air bag diagnosis sensor unit must always be installed with the arrow mark “ ⇐” pointing toward the front
of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or rust
before installation and replace as required.
• The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to turn steering wheel or column after removal of steering gear.
• Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.
• Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
• After air bag inflates, the front instrument panel assembly should be replaced if damaged.
Occupant Classification System PrecautionINFOID:0000000003775155
Replace control unit and passenger front seat cushion as an assembly.
Revision: December 20092009 QX56

SIDE AIR BAG (SATELLITE) SENSORSR-15
< ON-VEHICLE REPAIR >
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SIDE AIR BAG (S ATELLITE) SENSOR
Removal and InstallationINFOID:0000000003775162
REMOVAL
CAUTION:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
• Do not use old nuts after removal; replace with new nuts.
• Check side air bag (satellite) sensor to make sure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of da mage, replace it with new one.
• Do not disassemble side air bag (satellite) sensor.
• Replace side air bag (satellite ) sensor if it has been dropped or sustained an impact.
1. Disconnect the negative and positive battery cable, then wait at least 3 minutes.
2. Remove seat belt retractor. Refer to SB-4, "
Removal and Installation of Front Seat Belt".
3. Remove side air bag (satellite) sensor nuts.
4. Disconnect the side air bag (satellite) sensor harness connector.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
LHIA0057E
Revision: December 20092009 QX56

SR-16
< ON-VEHICLE REPAIR >
FRONT SEAT BELT PRE-TENSIONER
FRONT SEAT BELT PRE-TENSIONER
Removal and InstallationINFOID:0000000003775163
For removal and installation procedures for seat belt and seat belt buckle pre-tensioners, refer to SB-4,
"Removal and Installation of Front Seat Belt".
Revision: December 20092009 QX56

DIAGNOSIS SENSOR UNITSR-17
< ON-VEHICLE REPAIR >
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DIAGNOSIS SENSOR UNIT
Removal and InstallationINFOID:0000000003775164
REMOVAL
CAUTION:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at least 3 minutes.
• Do not use old bolts; replace with new bolts.
• Check diagnosis sensor unit bracket to make sure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace with new one.
• Replace diagnosis sensor unit if it has been dropped or sustained an impact.
• When replacing the air bag diagno sis sensor unit, always check with the parts department for he lat-
est parts information. Installing an incorrect air bag diagnosis sensor unit may or may not cause the
air bag warning lamp to illuminate and may cause incorrect deployment of the supplemental air bags
and seat belt pre-tensioner in a collision r esulting in serious personal injury or death.
1. Always check the air bag diagnosis sensor unit E CU discriminated number (identification number) using
CONSULT-III.
2. Disconnect the negative and positive battery term inals, then wait at least three minutes.
3. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner.
4. Remove center console. Refer to IP-20, "
Removal and Installation".
5. Disconnect diagnosis sensor unit harness connectors.
6. Remove bolts from the diagnosis sensor unit.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
CAUTION:
• After replacing the air bag diagnosis sensor unit, confirm using CO NSULT-III that the ECU discrimi-
nated number (identification number) of the ne w replacement air bag diagnosis sensor unit matches
the ECU discriminated number (identification numb er) of the replaced (old) air bag diagnosis sensor
unit.
• The diagnosis sensor unit must always be installed with the arrow mark " ⇐" pointing toward the
front of the vehicle for proper operation.
NOTE:
1. Diagnosis sensor unit ⇐Vehicle front
AWHIA0159ZZ
Revision: December 20092009 QX56