2001 INFINITI QX4 warning

SEAT BELT RETRACTOR ON-VEHICLE CHECKNBRS0029S03Emergency Locking Retractors (ELR) and Automatic Locking Retractors (ALR)NBRS0029S0301NOTE:
All seat belt retractors are of the Emergency Locking Retractors (ELR) type. In an emergency (sudden stop)
the retractor will lock and prevent the belt from extending any further. All 3-point type seat belt retractors except
the driver's seat belt also have an Automatic Locking Retractors (ALR) mode. The ALR mode (also called child
restraint mode) is used when installing child seats. The ALR mode is activated when the seat belt is fully
extended. When the belt is then retracted partially, the ALR mode automatically locks the seat belt in a spe-
cific position so the belt cannot be extended any further. To cancel the ALR mode, allow the seat belt to fully
wind back into the retractor.
Check the seat belt retractors using the following test(s) to determine if a retractor assembly is operating
properly.
ELR Function Stationary CheckNBRS0029S0302Grasp the shoulder belt and pull forward quickly. The retractor should lock and prevent the belt from extend-
ing further.
ALR Function Stationary CheckNBRS0029S03041. Pull out entire length of seat belt from retractor until a click is heard.
2. Retract the belt partially. A clicking noise should be heard as the belt retracts indicating that the retractor
is in the Automatic Locking Retractors (ALR) mode.
3. Grasp the seat belt and try to pull out the retractor. The belt must lock and not extend any further. If NG,
replace the retractor assembly.
4. Allow the entire length of the belt to retract to cancel the automatic locking mode.
ELR Function Moving CheckNBRS0029S0303WARNING:
Perform the following test in a safe, open area clear of other vehicles and obstructions (for example,
a large, empty parking lot). Road surface must be paved and dry. DO NOT perform the following test
on wet or gravel roads or on public streets and highways. This could result in an accident and seri-
ous personal injury. The driver and passenger must be prepared to brace themselves in the event the
retractor does not lock.
1. Fasten driver's seat belt. Buckle a passenger into the seat for the belt that is to be tested.
2. Proceed to the designated safe area.
3. Drive the vehicle at approximately 16 km/h (10 MPH). Notify any passengers of a pending sudden stop
and the driver and passenger must be prepared to brace themselves in the event the retractor does not
lock, apply brakes firmly and make a very hard stop.
During stop, seat belts should lock and not be extended. If the seat belt retractor assembly does not lock,
perform the retractor off-vehicle check.
SEAT BELT RETRACTOR OFF-VEHICLE CHECKNBRS0029S041. Remove the seat belt retractor assembly.
2. Slowly pull out belt while tilting the retractor assembly forward from the mounted position without twisting
the retractor assembly as shown in the illustration.
15 degrees or less tilt: Belt can be pulled out.
35 degrees or more tilt: Belt locks and cannot be pulled out.
SEAT BELTS
Seat Belt Inspection (Cont'd)
RS-8

Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
NBRS0005The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to INFINITI QX4 is as follows:
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
IFor a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
WARNING:
ITo avoid rendering the SRS inoperative, 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 INFINITI dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTIONS FOR SRS ªAIR BAGº AND ªSEAT BELT PRE-TENSIONERº SERVICENBRS0006IDo not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
IBefore servicing the SRS, turn ignition switch ªOFFº, disconnect both battery cables and wait at least 3
minutes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
IDiagnosis sensor unit must always be installed with their arrow marks ªgº pointing towards the front of
the vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before
installation and replace as required.
IThe 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.
IHandle air bag module carefully. Always place driver and passenger air bag modules with the pad side
facing upward and side air bag module (built-in type) standing with the stud bolt side setting bottom.
IConduct self-diagnosis to check entire SRS for proper function after replacing any components.
IAfter air bag inflates, the front instrument panel assembly should be replaced if damaged.
WIRING DIAGRAMS AND TROUBLE DIAGNOSISNBRS0007When you read wiring diagrams, refer to the following:
IGI-11, ªHOW TO READ WIRING DIAGRAMSº
IEL-9, ªPOWER SUPPLY ROUTINGº for power distribution circuit
When you perform trouble diagnosis, refer to the following:
IGI-35, ªHOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSESº
IGI-24, ªHOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENTº
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Precautions
RS-10

SRS797-A
Maintenance ItemsNBRS0011CAUTION:
Do not use electrical test equipment to check SRS circuit.
1. Check operation of ªAIR BAGº warning lamp.
After turning ignition key to ªONº position, air bag warning lamp
illuminates. The ªAIR BAGº warning lamp will go off after about
7 seconds if no malfunction is detected. If any of the following
warning lamp conditions occur, immediately check the air bag
or seat belt pre-tensioner system. Refer to RS-38 for details.
IThe ªAIR BAGº warning lamp does not illuminate when the
ignition switch is turned ªONº.
IThe ªAIR BAGº warning lamp does not go off about 7 seconds
after the ignition switch is turned ªONº.
IThe ªAIR BAGº warning lamp blinks after about 7 seconds after
the ignition switch is turned ªONº.
2. Visually check SRS components.
1) Diagnosis sensor unit
ICheck diagnosis sensor unit and bracket for dents, cracks and
deformities.
ICheck connectors for damage, and terminals for deformities.
2) Air bag module and steering wheel
IRemove air bag module from steering wheel, instrument panel
or seatback. Check harness cover and connectors for damage,
terminals for deformities, and harness for binding.
IInstall driver air bag module to steering wheel to check fit or
alignment with the wheel.
ICheck steering wheel for excessive free play.
IInstall passenger air bag module to instrument panel to check
fit or alignment with the instrument panel.
IInstall side air bag module to seatback to check fit and align-
ment with the seat.
3) Spiral cable
ICheck spiral cable for dents, cracks, or deformities.
ICheck connectors and protective tape for damage.
ICheck steering wheel for noise, binding or heavy operation.
4) Main harness, air bag harness, body harness, side air bag
module sub-harness
ICheck connectors for poor connections, damage, and termi-
nals for deformities.
ICheck harnesses for binding, chafing or cut.
5) Seat belt pre-tensioner
ICheck harness cover and connectors for damage, terminals
for deformities, and harness for binding.
ICheck belts for damage and anchors for loose mounting.
ICheck retractor for smooth operation.
IPerform self-diagnosis for seat belt pre-tensioner using air bag
warning lamp or CONSULT-II. Refer to ªSRS Operation Checkº
for details. (RS-38)
6) Satellite sensor
ICheck satellite sensor (including bracket portion) for dents,
cracks or deformities.
ICheck connectors for damage, and terminals for deformities.
CAUTION:
Replace previously used special bolts and ground bolt with
new ones.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items
RS-14

SBF812EH
8. Position air bag module and tighten with new special bolts.
9. Connect air bag module connector.
10. Install steering switches and lids.
11. Conduct self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT-II or warning lamp check.)
Before performing self-diagnosis, connect both battery cables.
12. Turn steering wheel to the left end and then to the right end
fully to make sure that spiral cable is set in the neutral posi-
tion.
If air bag warning lamp blinks or stays ON (at the user mode),
it shows the spiral cable may be snapped due to its improper
position. Perform self-diagnosis again (use CONSULT-II or
warning lamp). If a malfunction is detected, replace the spiral
cable with a new one.
13. Perform self-diagnosis again to check that no malfunction is
detected.
SRS162
Front Passenger Air Bag Module
REMOVALNBRS0016CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait for at least 3 minutes.
IAlways work from the side of or under air bag module.
1. Remove glove box assembly. Refer to BT-21, ªINSTRUMENT
PANEL ASSEMBLYº for details.
2. Disconnect front passenger air bag module connector from air
bag harness connector.
3. Remove instrument lower panel on passenger side. Refer to
BT-21, ªINSTRUMENT PANEL ASSEMBLYº for details.
SRS948
4. Remove hex bolts or special bolts using the TAMPER RESIS-
TANT TORX (Size T50) from front passenger air bag module.
5. Remove instrument panel assembly. Refer to BT-21, ªINSTRU-
MENT PANEL ASSEMBLYº for details.
6. Remove the bolts from left and right sides of front passenger
air bag module. Then remove the air bag module from the
instrument panel assembly.
IThe air bag module is heavy and should be supported using
both hands during removal.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Driver Air Bag Module and Spiral Cable (Cont'd)
RS-19

SRS162
4. Install instrument lower panel on passenger side.
5. Connect air bag module connector to air bag harness connec-
tor.
6. Install glove box assembly.
7. Connect both battery cables.
8. Conduct self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT-II or warning lamp check.)
SRS682
Side Air Bag Module
REMOVALNBRS0036CAUTION:
IBefore servicing SRS, turn the ignition switch OFF, dis-
connect both battery cables and wait at least 3 minutes.
IAlways work from the rear of the air bag module.
1. Remove seatback board.
IWhen using a clip removal tool to remove the seatback
board, take care not to damage the air bag harness.
2. Disconnect side air bag module connector by sliding tab.
SRS683
3. Pull up the seatback trim.
4. Remove the nuts securing the inner cloth with seatback frame.
Then pull up the inner cloth.
5. Remove seatback trim. Refer to BT-41, ªFRONT SEATº for
details.
SRS684
6. Remove the torx nuts coated with bonding agent from the side
air bag module.
7. Remove side air bag connector. Side air bag module can then
be removed.
SRS623
CAUTION:
IAlways place the air bag module stading with the stud bolt
side setting bottom.
IDo not attempt to disassemble air bag module.
IThe torx nuts are coated with bonding agent. Do not use
old nuts after removal; replace with new coated nuts.
IDo not insert any foreign objects (screwdriver, etc.) into
air bag module connector.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Front Passenger Air Bag Module (Cont'd)
RS-21

SBF814E
IReplace air bag module if it has been dropped or sus-
tained an impact.
IDo not expose the air bag module to temperatures exceed-
ing 90ÉC (194ÉF).
IDo not allow oil, grease or water to come in contact with
the air bag module.
IAfter air bag inflates, all parts of front seatback (including
front seatback frame) should be replaced.
SRS684
INSTALLATIONNBRS00371. Install side air bag module on seatback frame with new torx
nuts coated with bonding agent.
2. Install side air bag connector.
3. Install seatback trim. Refer to BT-41, ªFRONT SEATº for details.
SRS683
4. Secure the inner cloth which covers the side air bag module
with nuts.
SRS725
5. Connect side air bag module connector.
6. Install seatback board with new clips.
7. Connect both battery cables.
8. Go to ªSRS Operation Checkº, RS-38 and perform self-diag-
nosis to ensure entire SRS operates properly. (Use CON-
SULT-II or air bag warning lamp.)
Disposal of Air Bag Module and Seat Belt Pre-
tensioner
NBRS0018IBefore disposing of air bag module and seat belt pre-tensioner,
or vehicles equipped with such systems, deploy the systems.
If such systems have already been deployed due to an
accident, dispose of them as indicated in ªDISPOSING OF AIR
BAG MODULE AND SEAT BELT PRE-TENSIONERº (RS-28).
IWhen deploying the air bag module and seat belt pre-
tensioner, always use the Special Service Tool; Deployment
tool KV99106400 (Kent-Moore No. J38381).
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Side Air Bag Module (Cont'd)
RS-22

Trouble Diagnoses Introduction=NBRS0040CAUTION:
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
IDo not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged,
replace it with a new one.
IKeep ground portion clean.
DIAGNOSIS FUNCTIONNBRS0040S01The SRS self-diagnosis results can be read by using ªAIR BAGº warning lamp and/or CONSULT-II. The read-
ing of these results is accomplished using one of two modes Ð ªUser modeº and ªDiagnosis modeº.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system
malfunction through the operation of the ªAIR BAGº warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the ªAIR BAGº warning lamp and CONSULT-II are as follows:
User mode Diagnosis mode Display type
ªAIR BAGº warning lamp X X ON-OFF operation
CONSULT-II Ð X Monitoring
NOTE:
Seat belt pre-tensioner malfunction is indicated by ªAIR BAGº warning lamp.
DIAGNOSIS MODE FOR CONSULT-IINBRS0040S02IªSELF-DIAG [CURRENT]º
A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-II screen in real time. This refers to a malfunctioning part requiring
repairs.
IªSELF-DIAG [PAST]º
Diagnosis results previously stored in the memory are displayed on the CONSULT-II screen. The stored
results are not erased until memory erasing is executed.
IªTROUBLE DIAG RECORDº
With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be displayed
on the CONSULT-II screen.
IªECU DISCRIMINATED NO.º
The diagnosis sensor unit for each vehicle model is assigned with its own, individual classification num-
ber. This number will be displayed on the CONSULT-II screen, as shown below. When replacing the diag-
nosis sensor unit, refer to the part number for the compatibility. After installation, replacement with a cor-
rect unit can be checked by confirming this classification number on the CONSULT-II screen.
SRS851
For INFINITI QX4, the diagnosis sensor unit classification numbers assigned is A540.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses Introduction
RS-29

HOW TO CHANGE SELF-DIAGNOSIS MODE WITH CONSULT-II=NBRS0040S03From User Mode to Diagnosis ModeNBRS0040S0301After selecting ªAIR BAGº on the ªSELECT SYSTEMº screen, User mode automatically changes to Diagno-
sis mode.
SRS803
From Diagnosis Mode to User ModeNBRS0040S0302To return to User mode from Diagnosis mode, touch ªBACKº key of CONSULT-II until ªSELECT SYSTEMº
appears, Diagnosis mode automatically changes to User mode.
SRS804
HOW TO CHANGE SELF-DIAGNOSIS MODE WITHOUT CONSULT-IINBRS0040S04From User Mode to Diagnosis ModeNBRS0040S0401Diagnosis mode activates only when a malfunction is detected, by turning ignition switch as follows:
1) Turn ignition switch ªONº.
2) After ªAIR BAGº warning lamp lights for 7 seconds, turn ignition switch ªOFFº within 1 second.
3) Wait more than 3 seconds.
4) Repeat steps 1 to 3 three times.
5) Turn ignition switch ªONº.
SRS will not enter Diagnosis mode, if no malfunction is detected.
From Diagnosis Mode to User ModeNBRS0040S0402After a malfunction is repaired, switch the ignition ªOFFº for at least one second, then back ªONº. Diagnosis
mode is returned to User mode.
If switching Diagnosis mode to User mode is required while malfunction is being detected, by turning ignition
switch as follows:
1) Turn ignition switch ªONº.
2) After ªAIR BAGº warning lamp lights for 7 seconds, turn ignition switch ªOFFº within 1 second.
3) Wait more than 3 seconds.
4) Repeat steps 1 to 3 three times.
5) Turn ignition switch ªONº.
HOW TO ERASE SELF-DIAGNOSIS RESULTSNBRS0040S05With CONSULT-IINBRS0040S0501IªSELF-DIAG [CURRENT]º
A current Self-diagnosis result is displayed on the CONSULT-II screen in real time.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses Introduction (Cont'd)
RS-30