2009 INFINITI QX56 Factory Service Manual

low beam turn signal bulb start stop button park assist manual radio set roof rack

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INFINITI QX56 2009 Factory Service Manual
BCS
BCM (BODY CONTROL MODULE)BCS-51
< ECU DIAGNOSIS > [BCM]
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DTC Inspection Priority ChartINFOID:0000000003776424
If some DTCs are displayed at the same time, per
form in

BCS
BCM (BODY CONTROL MODULE)BCS-51
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DTC Inspection Priority ChartINFOID:0000000003776424
If some DTCs are displayed at the same time, per
form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000003776425
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: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
BCS-52
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
CONSULT display Fail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further te

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INFINITI QX56 2009 Factory Service Manual
BCS
COMBINATION SWITCH SYSTEM SYMPTOMSBCS-53
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SYMPTOM DIAGNOSIS
COMBINATION SWITCH SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003776426
1. Per

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INFINITI QX56 2009 Factory Service Manual
BCS-54
< PRECAUTION >[BCM]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005851887
The Supplemental Res

BCS-54
< PRECAUTION >[BCM]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005851887
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 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 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 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 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 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:0000000005851888
NOTE:
This Procedure is applied only to models with Intelli gent 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

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INFINITI QX56 2009 Factory Service Manual
BCS
PRECAUTIONSBCS-55
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5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery ca

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INFINITI QX56 2009 Factory Service Manual
BCS-56
< ON-VEHICLE REPAIR >[BCM]
BCM (BODY CONTROL MODULE)
ON-VEHICLE REPAIR
BCM (BODY CONTROL MODULE)
Removal and InstallationINFOID:0000000003776427
BCM
Removal
NOTE:
If possible, before removing

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INFINITI QX56 2009 Factory Service Manual BR-1
BRAKES
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SECTION BR
A
B
BR
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CONTENTS
BRAKE SYSTEM
PRECAUTION ....... ........................................3
PRECAUTIONS .............................................. ...

BR-1
BRAKES
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SECTION BR
A
B
BR
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CONTENTS
BRAKE SYSTEM
PRECAUTION ....... ........................................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
3
Precaution for Brake System ....................................4
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tool ........................................... ......5
Commercial Service Tool ..........................................5
FUNCTION DIAGNOSIS ...............................6
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
6
NVH Troubleshooting Chart ................................ ......6
BASIC INSPECTION ....................................7
FRONT DISC B RAKE .................................... .....7
BRAKE PAD .......................................................... ......7
BRAKE PAD : Inspection ..........................................7
DISC ROTOR ......................................................... ......7
DISC ROTOR : Inspection ........................................7
REAR DISC BRAKE ...................................... .....9
BRAKE PAD .......................................................... ......9
BRAKE PAD : Inspection ..........................................9
DISC ROTOR ......................................................... ......9
DISC ROTOR : Inspection ........................................9
BRAKE BOOSTER ............................................10
Inspection ............................................................ ....10
VACUUM LINES ............................................. ....11
Inspection ............................................................ ....11
BRAKE MASTER CYLINDER ..........................12
On Board Inspection ................................................12
BRAKE TUBE AND HOSE ...............................13
Hydraulic Circuit ......................................................13
FRONT BRAKE ..................................................... ....13
FRONT BRAKE : Inspection ......................... ...........13
REAR BRAKE ........................................................ ....14
REAR BRAKE : Inspection ........................ ..............14
ON-VEHICLE MAINTEN ANCE ....................15
BRAKE PEDAL .................................................15
Inspection and Adjustment .................................. ....15
BRAKE FLUID ..................................................17
On Board Inspection ............................................ ....17
Drain and Refill ........................................................17
Bleeding Brake System ...........................................17
ON-VEHICLE REPAIR .................................19
BRAKE PEDAL .................................................19
Removal and Installation ..................................... ....19
BRAKE TUBE AND HOSE ...............................21
Hydraulic Circuit ......................................................21
Removal and Installation of Front Brake Piping
and Brake Hose .......................................................
21
Removal and Installation of Rear Brake Piping
and Brake Hose .......................................................
22
Inspection After Installation .....................................23
BRAKE MASTER CYLINDER ..........................25
Removal and Installation .........................................25
BRAKE BOOSTER ...........................................26
Removal and Installation ..................................... ....26
VACUUM LINES ...............................................28
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual BR-2
Removal and Installation ........................................28
FRONT DISC BRAKE ........................................29
Exploded View of Brake Pads ............................. ...29
R

BR-2
Removal and Installation ........................................28
FRONT DISC BRAKE ........................................29
Exploded View of Brake Pads ............................. ...29
Removal and Installation of Brake Pads .................29
Brake Burnishing Procedure ...................................30
Exploded View of Brake Caliper .............................31
Removal and Installation of Brake Caliper and Ro-
tor ...........................................................................
31
REAR DISC BRAKE ..........................................34
Exploded View of Brake Pads ............................. ...34
Removal and Installation of Brake Pad ..................34
Brake Burnishing Procedure ...................................35
Exploded View of Brake Caliper .............................35
Removal and Installation of Brake Caliper and
Disc Rotor ............................................................ ...
36
DISASSEMBLY AND ASSEMBLY .............37
BRAKE MASTER CYLINDER ........................ ...37
Disassembly and Assembly ................................. ...37
FRONT DISC BRAKE .......................................39
Disassembly and Assembly ................................. ...39
REAR DISC BRAKE ....................................... ...42
Disassembly and Assembly ................................. ...42
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................. ...............
45
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
45
General Specification ........................................... ...45
Brake Pedal ............................................................45
Brake Booster .........................................................46
Check Valve ............................................................46
Front Disc Brake .....................................................46
Rear Disc Brake ......................................................46
Revision: December 20092009 QX56

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