2009 INFINITI QX56 ignition

SIDE CURTAIN AIR BAG MODULESR-13
< ON-VEHICLE REPAIR >
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SIDE CURTAIN AIR BAG MODULE
Removal and InstallationINFOID:0000000003775160
REMOVAL
CAUTION:
• Do not attempt to repair or replace damaged direct-connect SRS component connectors. If a direct- connect harness connector is damage d, the harness must be replaced.
• Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at least 3 minutes.
• When servicing the SRS, do not work from directly in front of air bag module.
• Do not insert any foreign objects (screwdriver, etc.) into air bag module or harness connectors.
• Do not disassemble air bag module.
• Do not expose the air bag modu le to temperatures exceeding 90°C (194 °F).
• Replace side curtain air bag modu le if it has been dropped or
sustained an impact.
• Do not allow oil, grease or water to come in contact with the
air bag module.
1. Remove headlining. Refer to INT-17, "
Removal and Installation".
2. Disconnect front and rear side curtain air bag module connec- tors.
• For removal/installation of the direct-connect SRS connectors,refer to SRC-9, "
Direct-connect SRS Component Connectors".
3. Remove the bolts in order starting at the front or rear, and remove the side curtain air bag module.
INSTALLATION
Installation is in the reverse order of removal.
• For removal/installation of the direct-connect SRS connectors, refer to SRC-9, "
Direct-connect SRS Compo-
nent Connectors".
• After replacement of side curtain air bag module, per form self-diagnosis to check that no malfunction is
detected. Refer to SRC-13, "
SRS Operation Check".
1. Rear side curtain air bag module
connector 2. Front side curtain air bag module
connector ⇐
Vehicle front
WHIA0294E
SBF814E
Revision: December 20092009 QX56

SR-14
< ON-VEHICLE REPAIR >
CRASH ZONE SENSOR
CRASH ZONE SENSOR
Removal and InstallationINFOID:0000000003775161
REMOVAL
CAUTION:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
• Replace crash zone sensor if it has been dropped or sustained an impact.
• Do not disassemble crash zone sensor.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Disconnect the crash zone sensor harness connector.
3. Remove crash zone sensor nuts.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is complete, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-13,
"SRS Operation Check".
LHIA0056E
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

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

SRC-6
< FUNCTION DIAGNOSIS >
SRS AIR BAG SYSTEM
FUNCTION DIAGNOSIS
SRS AIR BAG SYSTEM
SRS ConfigurationINFOID:0000000003775171
The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or
START position.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module, front passenger air bag module, front seat belt pre-tensioners
and seat belt buckle pre-tensioner assemblies are activated in a frontal collision but not in a side collision.
SRS configurations for some collision modes are as follows:
WHIA0215E
SRS configuration Frontal collision Left side collision Right side colli-
sion Rollover
Driver air bag module x— — —
Front passenger air bag module x— — —
Front LH seat belt pre-tensioner x— — x
Front LH seat belt buckle pre-tensioner assembly x— — x
Front RH seat belt pre-tensioner x— — x
Front RH seat belt buckle pre-tensioner assembly x— — x
Front LH side air bag module —x— —
Front RH side air bag module —— x—
LH side curtain air bag module —x— x
RH side curtain air bag module —— xx
Revision: December 20092009 QX56

SRC-12
< FUNCTION DIAGNOSIS >
PASSENGER SEAT BELT WARNING SYSTEM
PASSENGER SEAT BELT WARNING SYSTEM
System DiagramINFOID:0000000003775181
System DescriptionINFOID:0000000003775182
The passenger seat belt warning system will remind the driver if the
driver or front passenger seat belt should be buckled by turning on
the seat belt warning light (1). The system works in conjunction with
the occupant classification system. Refer to SRC-10, "
Occupant
Classification System (OCS)".
Passenger Seat Belt Warning System Operation
Component Parts LocationINFOID:0000000003775183
Refer to SRC-7, "SRS Component Parts Location".
ALHIA0028GB
AWHIA0032ZZ
Driver seat status
(Ignition switch ON) Passenger seat status Seat belt buckle switch
LH status Seat belt buckle switch
RH statusSeat belt warning lamp
Seat occupied Seat occupied
Buckled Buckled
Off
Unbuckled On
Seat unoccupied —Off
— Unbuckled On
Revision: December 20092009 QX56

ON BOARD DIAGNOSTIC (OBD) SYSTEMSRC-13
< FUNCTION DIAGNOSIS >
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Trouble Diagnosis IntroductionINFOID:0000000003775184
CAUTION:
• Do not use electrical test equipment on any circui t related to the SRS unless instructed to do so in
this Service Manual. SRS wiring harnesses can be id entified by yellow and/or orange harness con-
nectors.
• Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace it
with a new one.
• Keep ground connections clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by usi ng “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 mal-
function 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 follows:
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT - Vehicle model
WHEN - Date, Frequencies
WHERE - Road conditions
HOW - Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.
•Battery
•Fuse
• System component-to-harness connections
SRS Operation CheckINFOID:0000000003775185
DIAGNOSTIC PROCEDURE 1
Checking SRS Operation Using “AIR BAG” Warning Lamp—User Mode
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
2. Compare the SRS air bag warning lamp blinking pattern with the examples.
User mode Diagnosis mode Display type
“AIR BAG” warning lamp XXON-OFF operation
CONSULT-III —XMonitoring
BF-1845D
Revision: December 20092009 QX56

ON BOARD DIAGNOSTIC (OBD) SYSTEMSRC-15
< FUNCTION DIAGNOSIS >
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Trouble Diagnosis without CONSULT-IIIINFOID:0000000003775186
DIAGNOSTIC PROCEDURE 6
Inspect SRS Malfunction Using "AIR BAG" Warning Lamp—Diagnosis Mode
NOTE:
SRS will not enter Diagnosis mode if no malfunction is detected in User mode.
1. Turn ignition switch ON.
2. After “AIR BAG” warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 two more times (3 times total).
5. Turn ignition switch ON.
SRS is now in Diagnosis mode. Refer to SRC-85, "
Trouble Diagnosis without CONSULT-III".
CONSULT-III Function (AIR BAG)INFOID:0000000003775187
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
Self-Diagnosis Function (Without CONSULT-III)INFOID:0000000003775188
• The reading of these results is accomplished using one of two modes — “User mode” and “Diagnosis
mode”.
• After a malfunction is repaired, turn the ignition s witch OFF for at least one second, then back ON. Diagnosis
mode returns to the User mode. At that time, the self-diagnostic result is cleared.
AIR BAG diagnostic mode Description
SELF-DIAG [CURRENT] A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-III screen in real
time. This refers to a malfunctioning part requir-
ing repairs.
SELF-DIAG [PAST] Diagnosis results previously stored in the memo
ry are displayed on the CONSULT-III screen. The
stored results will remain until memory erasing is executed.
TROUBLE DIAG RECORD With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-III screen.
ECU DISCRIMINATED NO. Air bag diagnosis sensor unit ECU discriminated number (identification number) is displayed. Air bag
diagnosis sensor unit has individual ECU discriminated number (identification number) based on model
and equipment.
PASSENGER AIR BAG The STATUS (readiness) of the front passenger air bag module is displayed. The STATUS displayed
(ON/OFF) depends on the signals supplied to the occupant classification system control module and
air bag diagnosis sensor unit. Refer to
SRC-10, "
Occupant Classification System (OCS)" for more in-
formation.
Revision: December 20092009 QX56