2011 INFINITI QX56 Factory Service Manual

battery location diagram wiring diagram CD changer alternator change key battery

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INFINITI QX56 2011 Factory Service Manual
SRC-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006219948
1. Driver air bag module 2. Combination meter 3. Front passenger air b

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COMPONENT PARTSSRC-9
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Component DescriptionINFOID:0000000006219949
13. Occupant detection system control unit 14. Occupant detection system sea

COMPONENT PARTSSRC-9
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Component DescriptionINFOID:0000000006219949
13. Occupant detection system control unit 14. Occupant detection system seat
sensor 15. Crash zone sensor
16. Combination switch (spiral cable)
A. Behind center pillar lower garnish B. View with seatback pad removed C. View with laggage side finisher lower removed
D. View with headlining assembly re- moved E. View with headlining assembly re-
moved F. View with center console assembly
removed
G. Backside of passenger seat cushion frame H. View with bumper fascia assembly
removed I. View with steering wheel removed
Component Function
Air bag diagnosis sensor unit Detects a collision and supplies power supply for deployment to air bag module and
pre-tensioner seat belt.
It contains the “G” sensors for both frontal and side collisions and spare battery function in case of main battery damage in collision.
Combination meter (air bag warning lamp) Indicates air bag malfunctioning and deployment by blinking and illuminating air bag
warning lamp.
Combination switch (spiral cable) Supplies power supply to driver air bag module on steering wheel.
Crash zone sensor Transmits signal to air bag diagnosis sensor unit when a frontal collision occurs.
Crash zone sensor is a G sensor that outputs voltage signal during deceleration at
the time of a vehicle frontal collision that is more than the specified limit is detected.
Curtain air bag module (front/rear) Deploys according to collision judgment of G sensor, and safing sensor.
Receives collision signal from air bag diagnosis sensor unit, ignites, and burns ig-
nition material by electric ignition system, when side collision exceeds setting limit
of the vehicle. Gas is generated by chemical reaction of ignition material, passes
filter, and deploys air bag.
Air bag module mainly consists of air bag and inflator that deploys air bag.
Driver air bag module Receives signal from air bag diagnosis sensor unit and deploys air bag.
In case of frontal collision where acceleration is more than the specified level, the
ignition materials are ignited by electric ignition system. The system burns the gas
generating materials resulting in a chemical reaction. This generates hot gases that
flow into the air bag through a filter and expand the bag.
Occupant detection system control unit Detects front passenger seat occupant.
Passenger air bag module Receives signal from air bag diagnosis sensor unit and deploys air bag.
In case of frontal collision where acceleration is more than the specified level, the
ignition materials are ignited by electric ignition system. The system burns the gas
generating materials resulting in a chemical reaction. This generates hot gases that
flow into the air bag through a filter and expand the bag.
Passenger air bag OFF indicator Indicates whether or not passenger air bag is in the activation mode based on the
judgement of occupant classification system.
Satellite sensor (front/rear) Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
When air bag diagnosis sensor unit defines both signal voltage of the “G” sensor,
and the safing algorithm to be that of collision which is more than the specified lev-
el, the driving circuit switches on and feeds the electric ignitor of both the side air
bag and curtain air bag and seat belt pre-tensioner.
Seat belt buckle switch LH/RH Controls deployment timing depending on the seat belt condition that is fastened or
unfastened.
Seat belt pre-tensioner LH/RH Receives signal from air bag diagnosis sensor unit and deploys seat belt pre-ten-
sioner.
In the case of a frontal collision or side collision or roll over that exceeds specified impact level, the air bag diagnosis sensor unit detects the deceleration caused by
collision. It restrains the passenger with seat belt easing the stress on passengers
chest with load limiter.
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SRC-10
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Side air bag module LH/RH Receives signal from air bag diagnosis sensor unit and deploys air bag.
In case of side collision where acceleration is more

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System DiagramINFOID:0000000006219950
JMHIA1560GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SRC-12
< SYSTEM DESCRIPTION >
SYSTEM
System Description
INFOID:0000000006219951
Supplemental Restraint System (SRS ) activates air bag module and seat belt pre-tensioner when it detects a
frontal col

SRC-12
< SYSTEM DESCRIPTION >
SYSTEM
System Description
INFOID:0000000006219951
Supplemental Restraint System (SRS ) activates air bag module and seat belt pre-tensioner when it detects a
frontal collision or a side collision or rollover that is more than the specified limit. Together with other safety
devices, it reduces the impact that occup ant receives when vehicle collision occurs.
Air bag diagnosis sensor unit supplies power supply to air bag module and pre-tensioner seat belt when decel-
eration that is more than the specified limit is detec ted by G sensor in air bag diagnosis sensor unit, crash
zone sensor, or satellite sensor. Air bag module is composed of electric igniter (squib), filter, pyrotechnic mate-
rial, and gas generating material. When air bag module re ceives a signal from air bag diagnosis sensor unit,
air bag module ignites pyrotechnic material using electric igniter (squib) so that gas generating material gener-
ates high temperature nitrogen gas. The gas through filter activates air bag. At the same time, pre-tensioner
seat belt receives power supply from air bag diagnosis sensor unit, gasgenerator is activated, and then gas is
generated. Balls in pipe are moved according to generated gas pressure and strike pinion gear on ELR shaft.
ELR shaft rotates and retracts seat belt.
AIR BAG DIAGNOSIS SENSOR UNIT FUNCTIONS
Air bag diagnosis sensor unit has the following functions.
Detects a collision and supplies the energy for deploying air bag and seat belt pre-tensioner.
Detects and records electrical malfunction in air bag system and seat belt pre-tensioner system, and blinking
air bag warning lamp.
Detects and records the deployment of air bag and s eat belt pre-tensioner, and turns ON air bag warning
lamp.
Indicates malfunctioning portion via the number of blin ks from the air bag warning lamp in the diagnosis
mode.
Indicates the malfunction record via CONSULT-III.
COLLISION MODES
The operation of SRS is different depending on the collision modes applications.
SRS configurations that are activa ted for the following collision modes.
×: Apply —: Not apply
OCCUPANT DETECTION SYSTEM
This Occupant Detection System has the following functions.
1. Suppress the deployment of front passenger air bag w hen front passenger seat is empty, or when occu-
pied by child and child-seat. Turns ON front passenger air bag OFF indicator when front passenger seat is
occupied by child-seat and child.
2. Indicates malfunction portion with blinking times of air bag warning lamp in diagnosis mode.
3. Indicates the malfunctioning record by CONSULT-III.
4. When “zero point reset” for occupant detection system is incomplete, CONSULT-III indicates that “zero
point reset” is incomplete.
This function is applied to NISSAN genuine parts only.
NOTE:
SRS configuration Frontal collision Left side collision Right side collision Roll over
Driver air bag module ×———
Passenger air bag module ×———
Seat belt pre-tensioner LH ××—×
Seat belt pre-tensioner RH ×— ××
Lap pre-tensioner LH ××—×
Lap pre-tensioner RH ×— ××
Side air bag module LH — ×——
Side air bag module RH — — ××
Front curtain air bag module LH — ×— ×
Front curtain air bag module RH — — ××
Rear curtain air bag module LH — ×— ×
Rear curtain air bag module RH — — ××
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Operation of air bag diagnosis sensor unit when air bag diagnosis sensor unit receives information from Occupant Detection Syste

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INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
DIAGNOSIS SYSTEM (AIR BAG)
DescriptionINFOID:0000000006219952
CAUTION:
Never use electrical test equipment on any circuit related to the SRS

SRC-14
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
DIAGNOSIS SYSTEM (AIR BAG)
DescriptionINFOID:0000000006219952
CAUTION:
Never use electrical test equipment on any circuit related to the SRS unless instructed in this Ser-
vice Manual. SRS wiring harnesses can be identifi ed by yellow and/or orange harnesses or harness
connectors.
Never repair, splice or modify the SRS wiring harn ess. If the harness is damaged, replace it with a
new one.
Keep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnostic results can be read with air bag warning lamp and/or CONSULT-III.
The user mode is exclusively prepared for the customer (driver). This mode warns the driver of a system
malfunction through the operation of the air bag warning lamp.
The diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the air bag warning lamp and CONSULT-III are as per the following items.
× : Application, —: Not application
On Board Diagn osis FunctionINFOID:0000000006219953
ON-BOARD DIAGNOSIS
There are two self diagnosis functions with air bag warning lamp per the following items.
USER MODE
DIAGNOSIS MODE
METHOD OF STARTING
Diagnosis mode changes from user mode to di agnosis mode when changing operation is performed.
In user mode, when SRS air bag warning lamp is not blinking, changing to diagnosis mode by ignition switch
operation is not possible.
In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when
ignition switch is turned from OFF to ON.
Procedure to Change Diagnosis Mode
1. Turn ignition switch from OFF to ON.
2. SRS air bag lamp turns ON for 7 second and turns OFF, then turn ignition switch OFF within 1second after the lamp turns OFF.
3. After turning ignition switch OFF, wait for 3 seconds or more.
4. Repeat operation 1 to 3 for 2 times so that operation 1 to 3 is repeated for 3times in total.
5. Turn ignition switch from OFF to ON. Diagnosis mode changes.
USER MODE
In USER MODE, air bag warning lamp on combination meter blinks when a malfunction is detected and warns
the customer (driver).
How to Read Air Bag Warning Lamp
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
2. Compare the air bag warning lamp blinking pattern with the examples.
Air Bag Warning Lamp Examples
Diagnosis tool User mode Diagnosis mode
Air bag warning lamp ××
CONSULT-III – ×
Revision: 2010 May2011 QX56

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DIAGNOSIS SYSTEM (AIR BAG)SRC-15
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DIAGNOSIS MODE
The diagnosis mode can only be switched when a malfuncti on is detected in the user mode. Malfu

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