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RESTRAINT SYSTEM GI

SECTION RS MA

EC
CONTENTS
FE
PRECAUTIONS AND PREPARATION............................2 Passenger Air Bag Deactivation Switch Indicator .....22
Supplemental Restraint System (SRS) Disposal of Air Bag Module .......................................23
``AIR BAG'' ...................................................................2 TROUBLE DIAGNOSES -- Supplemental CL
SEAT BELTS ...................................................................3 Restraint System (SRS) ...............................................27
Front Seat Belt.............................................................4 Trouble Diagnosis Introduction ..................................27
Rear Seat Belt .............................................................5 How to Perform Trouble Diagnoses for Quick MT
Seat Belt Inspection.....................................................6 and Accurate Repair ..................................................30
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)............9 Schematic ..................................................................31
Precautions for SRS ``AIR BAG'' Service....................9 Wiring Diagram -SRS- .............................................32 AT
Special Service Tools ................................................10 Passenger Air Bag Deactivation Switch Indicator
Description .................................................................11 Operation Check........................................................34
Passenger air bag deactivation switch......................11 SRS Operation Check ...............................................35
TF
SRS Component Parts Location ...............................12
Trouble Diagnoses with CONSULT .................36
Maintenance Items ....................................................13 PD
Diagnosis Sensor Unit and Crash Zone Sensor .......14
Trouble Diagnoses without CONSULT ............45
Removal And Installation ......................................14
Air bag diagnosis sensor unit...........................14 Trouble Diagnoses: ``AIR BAG'' Warning Lamp FA
Crash zone sensor (4WD models) ...................14 Does Not Turn Off .....................................................49
Driver Air Bag Module and Spiral Cable ...................15 Trouble Diagnoses: "AIR BAG" Warning Lamp
Passenger Air Bag Module........................................19 Does Not Turn On .....................................................50 RA
Passenger Air Bag Deactivation Switch ....................21 Trouble Diagnoses: SRS Does Not Enter
Passenger Air Bag Deactivation Switch Lock Diagnosis Mode Using Door Switch..........................51
Cylinder......................................................................21 COLLISION DIAGNOSIS...............................................52 BR

When you read wiring diagrams: RS
q Read GI section, ``HOW TO READ WIRING DIAGRAMS''.
q See EL section, ``POWER SUPPLY ROUTING'' for power distribution circuit.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW
CHART IN TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS
BT
FOR AN ELECTRICAL INCIDENT''.
HA

IDX
PRECAUTIONS AND PREPARATION

Supplemental Restraint System (SRS)
``AIR BAG''
The Supplemental Restraint System ``AIR BAG'', used along with a seat belt, helps to reduce the risk or
severity of injury to the driver and front passenger in a frontal collision. The Supplemental Restraint System
consists of air bag modules (located in the center of the steering wheel and in the instrument panel on the
passenger side), a diagnosis sensor unit, a crash zone sensor (4WD models), warning lamp, wiring harness
and spiral cable.
The vehicle is equipped with a passenger air bag deactivation switch. Because no rear seat exists where a
rear-facing child restraint can be placed, the switch is designed to turn off the passenger air bag so that a
rear-facing child restraint can be used in the front passenger seat. The switch is located in the center of the
instrument panel, near the ashtray. When the switch is turned to the ON position, the passenger air bag is
enabled and could inflate in a frontal collision. When the switch is turned to the OFF position, the passenger
air bag is disabled and will not inflate in a frontal collision. A passenger air bag OFF indicator on the instru-
ment panel lights up when the passenger air bag is switched OFF. The driver air bag always remains enabled
and is not affected by the passenger air bag deactivation switch.
WARNING:
q To 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 should be per-
formed by an authorized NISSAN dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses are covered with yellow insulation either just before the
harness connectors or on the complete harness, for easy identification.
q The vehicle is equipped with a passenger air bag deactivation switch which can be operated by
the customer. When the passenger air bag is switched OFF, the passenger air bag is disabled and
will not inflate in a frontal collision. When the passenger air bag is switched ON, the passenger air
bag is enabled and could inflate in a frontal collision. After SRS maintenance or repair, make sure
the passenger air bag deactivation switch is in the same position (ON or OFF) as when the vehicle
arrived for service.
CAUTION:
Certain systems and components, especially those related to OBD, may use a new style slide-locking
type harness connector.
For description and how to disconnect, refer to EL section, ``Description'', ``HARNESS CONNECTOR''.

RS-2
SEAT BELTS

CAUTION: GI
q Do not disassemble buckle or seat belt assembly.
q Replace anchor bolts if they are deformed or worn out.
q Never oil tongue and buckle. MA
q If any component of seat belt assembly is questionable, do not repair. Replace the seat belt
assembly.
q If webbing is cut, frayed, or damaged, replace seat belt assembly. EM
q When replacing seat belt assembly, use a genuine NISSAN seat belt assembly.
q After any collision, inspect all seat belt assemblies, including retractors and other attached hard-
ware. LC

IDX

RS-3
SEAT BELTS

Front Seat Belt

ARS319

REMOVAL
Remove front seat. Refer to BT section (``Front Seat'', ``SEAT'').
1 Remove buckle.
2 Remove floor anchor bolt.
3 Remove adjuster cover and upper guide loop anchor bolt.
For King Cab models, remove jump seat. Refer to BT section, (``Rear Seat'', ``SEAT'').
Remove rear pillar lower and upper garnishes.
4 Remove guide plate.
5 Remove two adjuster bolts and adjuster assembly.
6 Remove retractor bolt and screw.
7 Remove retractor.

RS-4
SEAT BELTS

Rear Seat Belt GI

ARS320
RA
REMOVAL
1 Remove underseat storage. BR
2 Remove buckle.
3 Remove seat belt anchor bolt.

IDX

RS-5
SEAT BELTS

Seat Belt Inspection
AFTER A COLLISION
WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the
collision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted.

Replace any seat belt assembly if:
q The seat belt was in use at the time of a collision (except for minor collisions when the belts, retractors
and buckles show no damage and continue to operate properly).
q The seat belt was damaged in an accident (i.e. torn webbing, bent retractor or guide, etc.).
q The seat belt attaching point was damaged in an accident. Inspect the seat belt attaching area for dam-
age or distortion and repair as necessary before installing a new seat belt assembly.

PRELIMINARY CHECKS
1. Check the seat belt warning lamp/chime for proper operation as follows:
a. Switch ignition ON. The seat belt warning lamp should illuminate. Also, the seat belt warning chime should
sound for about 7 seconds.
b. Fasten driver's seat belt. The seat belt warning lamp should go out and the chime (if sounding) should
stop.
2. Check that the seat belt retractor, seat belt anchor and buckle bolts are securely attached.
3. Check the shoulder seat belt guide and shoulder belt height adjuster for front seats. Ensure guide swiv-
els freely and that belt lays flat and does not bind in guide. Ensure height adjuster operates properly and
holds securely.

4. Check retractor operation including:
a. Fully extend the seat belt webbing and check for twists, tears
or other damage.
b. Allow the seat belt to retract. Ensure that belt returns smoothly
and completely into the retractor. If the seat belt does not
return smoothly, wipe the inside of the loops with a clean paper
cloth, etc. because dirt built up in the loops of the upper
anchors can cause the seat belts to retract slowly.
c. Fasten the seat belt. Pull firmly on belt and buckle to ensure
belt remains latched. Unfasten seat belt. Ensure belt releases
freely and buckle button returns to original position.
ARS222
5. For non-retractable seat belts, check that the seat belts are
accessible. Check seat belt webbing for twists, tears or other
damage. Fasten the seat belt. Pull firmly on belt and buckle to
ensure belt remains latched. Unfasten seat belts. Ensure belt
releases freely and buckle button returns to original position.
6. Repeat steps above as necessary to check the other seat
belts.

RS-6
SEAT BELTS
Seat Belt Inspection (Cont'd)
GI
SEAT BELT RETRACTOR ON-VEHICLE CHECK
Emergency Locking Retractors (ELR) and Automatic Locking Retractors (ALR) MA
NOTE:
All seat belt retractors are of the Emergency Locking (ELR) type. In an emergency (sudden stop) the
retractor will lock and prevent the belt from extending any further. All outboard 3-point type seat belt EM
retractors except the driver's seat belt also have an Automatic Locking (ALR) mode. The ALR mode
(also called child restraint mode) is used when installing child seats in outboard seating positions. The
ALR mode is activated when the seat belt is fully extended. When the belt is then retracted partially, LC
the ALR mode automatically locks the seat belt in a specific 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.
EC
Check the seat belt retractors using the following test(s) to determine if a retractor assembly is operating
properly.
FE
ELR function stationary check
Grasp the shoulder belt and pull forward quickly. The retractor should lock and prevent the belt from extend-
ing further. CL

ALR function stationary check
MT
1. 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 retractor is in the
automatic locking (ALR) mode. AT
3. Grasp the seat belt and try to pull out of retractor. Belt must lock and not extend further. If NG, replace the
retractor assembly.
4. Allow the entire length of belt to retract to cancel the automatic locking mode.
TF
ELR function moving check (all outboard seating positions)
WARNING: PD
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- FA
ous personal injury. The driver and passenger must be prepared to brace themselves in the event the
retractor does not lock.
RA
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. BR
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 extend. If the seat belt retractor assembly does not lock, perform ST
the retractor off-vehicle check.

IDX

RS-7
SEAT BELTS
Seat Belt Inspection (Cont'd)
SEAT BELT RETRACTOR OFF-VEHICLE CHECK
1. Remove the seat belt retractor assembly.
2. Slowly pull out belt while tilting the retractor assembly forward from the mounted position 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.

ARS223

If NG, replace the retractor assembly.

RS-8
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Precautions for SRS ``AIR BAG'' Service GI
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service
Manual. SRS wiring harnesses are covered with yellow insulation either just before the harness connec- MA
tors or on the complete harness, for easy identification.
q Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3
minutes. EM
For approximately 3 minutes after the cables are removed, it is still possible for the air bag to deploy.
Therefore, do not work on any air bag system connectors or wires until at least 3 minutes have passed.
q Air bag diagnosis sensor unit and crash zone sensor (4WD models) must always be installed with forward LC
mark `` '' pointing toward the front of the vehicle for proper operation. Also check air bag diagnosis sen-
sor unit and crash zone sensor (4WD models) for cracks, deformities and rust before installation and
replace if necessary.
EC
q The rotation of the spiral cable is limited. The spiral cable must be aligned in the neutral position. If the
steering gear must be removed, set the front wheels in the straight-ahead direction. Do not rotate the
steering column while the steering gear is removed to avoid damaging the spiral cable.
q Handle air bag modules carefully. Always place them with the pad side facing upward.
FE
q Do not use old special bolts after removing any SRS parts; replace with new special bolts. Conduct self-
diagnosis to check entire SRS for proper operation.
q If front of vehicle is damaged in a collision, always check the crash zone sensor (4WD models) and the CL
wiring harness.
q After air bag inflates, the instrument panel assembly should be replaced if damaged.
q After SRS maintenance or repair, make sure the passenger air bag deactivation switch is in the same MT
position (ON or OFF) as when the vehicle arrived for service.
AT

IDX

RS-9
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.) Description
Tool name

KV991072S0 Disposing of air bag module
(J38381-KIT)
Air bag deployment kit

KV99106400
(J38381)
Deployment tool NT357

KV991065S0
(J38381-30)
Deployment tool
adapters

ARS269

KV99105300 Anchoring the air bag module
(J41246)
Air bag module bracket

NT354

HT61961000 and Use for special bolts
HT62152000 combined [TAMPER RESISTANT TORX (Size T50)]
(J38219)
*Special torx bit a: 3.5 (0.138) dia.
b: 8.5 - 8.6 (0.335 - 0.339) dia.
c: approx. 10 (0.39) sq.
NT361 Unit: mm (in)

*: Special tool or commercial equivalent

RS-10
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Description GI
2WD models
The diagnosis sensor unit will deploy the air bags if the G-sensor activates simultaneously with the safing MA
sensor while the ignition switch is ON. The passenger air bag does not deploy when the passenger air bag
deactivation switch is turned to the OFF position.
EM
4WD models
The diagnosis sensor unit will deploy the air bags if the G-sensor and/or the crash zone sensor activates
simultaneously with the safing sensor while the ignition switch is ON. The passenger air bag does not deploy LC
when the passenger air bag deactivation switch is turned to the OFF position.

Crash zone sensor
Diagnosis sensor unit Passenger air bag
Driver Passenger
EC
Ignition deactivation switch
(4WD models only) G-sensor Safing sensor air bag air bag
position
ON Deploy Deploy FE
ON -- ON ON
OFF Deploy Not deploy
ON Deploy Deploy CL
ON ON -- ON
OFF Deploy Not deploy
ON Deploy Deploy
ON ON ON ON MT
OFF Deploy Not deploy

Passenger air bag deactivation switch AT
The vehicle is equipped with a passenger air bag deactivation
switch which can be operated by the customer. When the switch is TF
turned to the ON position, the passenger air bag is enabled and
could inflate in a frontal collision. When the switch is turned to the
OFF position, the passenger air bag is disabled and will not inflate PD
in a frontal collision.
After turning the ignition switch ON, a passenger air bag deactiva-
tion switch indicator illuminates on the instrument panel for bulb FA
check. The indicator will stay lit if the passenger air bag deactiva-
ARS240 tion switch is in the OFF position. If the passenger air bag deacti-
vation switch is in the ON position, the indicator will turn off after RA
about 7 seconds.
After SRS maintenance or repair, make sure the passenger air bag
deactivation switch is in the same position (ON or OFF) as when BR
the vehicle arrived for service.
IGN OFF ON ST
Passenger air bag Passenger air bag Passenger
deactivation switch deactivation switch air bag
RS
position indicator deployment
Turns off
ON Enabled
within 7 seconds BT
OFF Stays lit Disabled

IDX

RS-11
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Description (Cont'd)

ARS224

SRS Component Parts Location

ARS244

RS-12
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Maintenance Items GI
1. Check ``AIR BAG'' warning lamp operation
After turning the ignition key ON, ``AIR BAG'' warning lamp MA
illuminates. The ``AIR BAG'' warning lamp will turn off after
about 7 seconds if no malfunction is detected.
If any of the following ``AIR BAG'' warning lamp conditions EM
occur, immediately check the air bag system. Refer to RS-35.
q The warning lamp does not illuminate when the ignition switch
is turned ON.
LC
q The warning lamp does not turn off about 7 seconds after the
SBF806E ignition switch is turned ON.
q The warning lamp turns off about 7 seconds after the ignition
switch is turned ON, but it turns on again or blinks.
EC

2. Visually check SRS components
a. Crash zone sensor (4WD models) FE
q Check crash zone sensor to ensure the forward mark " " faces
the front of the vehicle.
q Check body and sensor bracket for deformities and rust. CL
q Check sensor case for dents, cracks, deformities and rust.
q Check sensor harness for binding, connector for damage and
terminals for deformities. MT
b. Air bag diagnosis sensor unit
q Check air bag diagnosis sensor unit and bracket for dents,
cracks and deformities. AT
q Check connectors for damage and terminals for deformities.

c. Air bag modules, steering wheel and instrument panel TF
q Remove driver air bag module from steering wheel. Check
harness cover and connectors for damage, terminals for
deformities, and harness for binding. PD
q Install driver air bag module in steering wheel to check fit or
alignment with the wheel.
q Check steering wheel for excessive free play. FA
q Remove passenger air bag module. Check harness cover and
connectors for damage, terminals for deformities, and harness
for binding. Check the bracket for deformities and rust. RA
q Install passenger air bag module in instrument panel to check
fit or alignment with the instrument panel.
BR
d. Spiral cable
q Check spiral cable for dents, cracks, and deformities.
q Check connectors and protective tape for damage. ST
q Check steering wheel for noise, binding and heavy operation.

e. Passenger air bag deactivation switch RS
q Check passenger air bag deactivation switch for damage.
q Check harness for binding, connector for damage and termi-
nals for deformities. BT
f. Main harness and air bag harness
q Check connectors for poor connections, damage, and termi- HA
nals for deformities.
q Check harnesses for binding, chafing and cuts.
EL
CAUTION:
Replace previously used special bolts with new ones.
IDX

RS-13
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Diagnosis Sensor Unit and Crash Zone Sensor
CAUTION:
q Before servicing SRS, turn the ignition switch OFF, disconnect both battery cables and wait at least
3 minutes.
q The special bolts are coated with bonding agent while the other bolt is for ground. Do not use old
bolts after removal; replace with new coated bolts.
q Check air bag diagnosis sensor unit for proper installation. Make sure that there are no deformities,
dents, cracks or rust. If there are any visible signs of damage, replace with a new one.
q Check air bag diagnosis sensor unit brackets to ensure they are free of deformities and rust.
q Replace air bag diagnosis sensor unit if it has been dropped or sustained an impact.
q Check crash zone sensor (4WD models) for proper installation. Make sure that there are no
deformities, dents, cracks or rust. If there are any visible signs of damage, replace the crash zone
sensor.
q Check crash zone sensor bracket (4WD models) to ensure that it is free of deformities and rust.

REMOVAL AND INSTALLATION
Air bag diagnosis sensor unit
1. Disconnect driver and passenger air bag module connectors.
2. Remove console box. Refer to BT section (``INSTRUMENT
PANEL'').
3. Disconnect air bag diagnosis sensor unit connector.
4. Remove bolts from air bag diagnosis sensor unit. Use TAMPER
RESISTANT TORX (Size T50) to remove special bolts.
5. Remove the air bag diagnosis sensor unit.
NOTE:

q To install, reverse the removal procedure.
q After replacement, perform self-diagnosis for SRS. Refer to
``SRS Operation Check'', ``TROUBLE DIAGNOSES -- Supple-
mental Restraint System (SRS)'', RS-35.
CAUTION:
Air bag diagnosis sensor unit must always be installed with
forward mark `` '' pointing towards the front of the vehicle
for proper operation. Also check air bag diagnosis sensor
unit for cracks, deformities and rust before installation and
replace as required.
ARS307

Crash zone sensor (4WD models)
1. Disconnect driver and passenger air bag module connectors.
2. Remove front grille. Refer to BT section.
3. Disconnect crash zone sensor connector.
4. Using the TAMPER RESISTANT TORX (Size T50), remove
special bolts. The crash zone sensor can then be removed.
NOTE:
q To install, reverse removal procedure.
q After replacement, perform Self-diagnosis for SRS. Refer
to ``SRS Operation Check'', ``TROUBLE DIAGNOSES --
ARS226 Supplemental Restraint System (SRS)'', RS-35.

RS-14
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Driver Air Bag Module and Spiral Cable GI

MT
ARS178

REMOVAL AT
CAUTION:
q Before servicing SRS, turn the ignition switch OFF, dis- TF
connect both battery cables and wait at least 3 minutes.
q Always work from the side of an air bag module.
1. Remove lower lid from steering wheel, and disconnect driver PD
air bag module connector.

FA
ARS227

2. Remove side lids. Using the TAMPER RESISTANT TORX RA
(Size T50), remove left and right special bolts. Driver air bag
module can then be removed.
BR

RS
ARS228
BT
CAUTION:
q Always place air bag module with pad side facing upward.
q Do not attempt to disassemble air bag module. HA
q The special bolts are coated with bonding agent. Do not
use old bolts after removal; replace with new coated bolts.
EL

IDX
ARS179

RS-15
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Driver Air Bag Module and Spiral Cable
(Cont'd)
q Do not drop or impact air bag module. If any portion is
deformed or cracked, replace the module.
q Do not expose the air bag module to temperatures exceed-
ing 90

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