2001 NISSAN ALMERA o2 sensor

Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
NJRS0006The 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 NISSAN MODEL N16 is as follows (The composition
varies according to the destination and optional equipment.):
+For 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), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
+For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (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:
+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.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow harness connector.
PRECAUTIONS FOR SRS ªAIR BAGº AND ªSEAT BELT PRE-TENSIONERº SERVICENJRS0007+Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
+Before 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.
+Diagnosis sensor unit must always be installed with their arrow marks ªÜº 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.
+The 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.
+Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and place front side air bag module standing with stud bolt side setting bottom.
+Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
+After air bag inflates, the front instrument panel assembly should be replaced if damaged.
WIRING DIAGRAMS AND TROUBLE DIAGNOSISNJRS0008When you read wiring diagrams, refer to the following:
+GI-11, ªHOW TO READ WIRING DIAGRAMSº
+EL-10, ªPOWER SUPPLY ROUTINGº for power distribution circuit
When you perform trouble diagnosis, refer to the following:
+GI-32, ªHOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSESº
+GI-21, ªHOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENTº
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Precautions
RS-20

COMMERCIAL SERVICE TOOLNJRS0040
Tool name Description
Tamper resistant torx
socket
NT757
Size: T30
SRS ConfigurationNJRS0010
SRS585-D
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in the ªONº or ªSTARTº
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 and front passenger air bag module are activated in a frontal
collision but not in a side collision.
SRS configurations which are activated for some collision modes are as follows;
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag modulejÐÐ
Front passenger air bag modulejÐÐ
Front LH seat belt pre-tensionerjÐÐ
Front RH seat belt pre-tensionerjÐÐ
Front LH side air bag module ÐjÐ
Front RH side air bag module Ð Ðj
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Preparation (Cont'd)
RS-22

SRS797-A
Maintenance ItemsNJRS0012CAUTION:
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, ªAIR BAGº warning
lamp illuminates. The ªAIR BAGº warning lamp will go off after
about 7 seconds if no malfunction is detected. If any of the fol-
lowing ªAIR BAGº warning lamp conditions occur, immediately
check the air bag system. Refer to RS-59 for details.
+The ªAIR BAGº warning lamp does not illuminate when the
ignition switch is turned ªONº.
+The ªAIR BAGº warning lamp does not go off about 7 seconds
after the ignition switch is turned ªONº.
+The 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
+Check diagnosis sensor unit and bracket for dents, cracks and
deformities.
+Check connectors for damage, and terminals for deformities.
2) Air bag module and steering wheel
+Remove air bag module from steering wheel, instrument panel
or seatback. Check harness cover and connectors for damage,
terminals for deformities, and harness for binding.
+Install driver air bag module to steering wheel to check fit or
alignment with the wheel.
+Check steering wheel for excessive free play.
+Install front passenger air bag module to instrument panel to
check fit or alignment with the instrument panel.
+Install front side air bag module to seatback to check fit and
alignment with the seat.
3) Spiral cable
+Check spiral cable for dents, cracks, or deformities.
+Check connectors and protective tape for damage.
+Check steering wheel for noise, binding or heavy operation.
4) Main harness, body harness, side air bag module sub-harness
+Check connectors for poor connections, damage, and termi-
nals for deformities.
+Check harnesses for binding, chafing or cut.
5) Front seat belt pre-tensioner
+Check harness cover and connectors for damage, terminals
for deformities, and harness for binding.
+Check belts for damage and anchors for loose mounting.
+Check retractor for smooth operation.
+Perform self-diagnosis for seat belt pre-tensioner using ªAIR
BAGº warning lamp or CONSULT-II.
Refer to ªSRS Operation Checkº for details. (RS-59)
6) Side air bag (satellite) sensor
+Check side air bag (satellite) sensor (including bracket portion)
for dents, cracks or deformities.
+Check connectors for damage, and terminals for deformities.
CAUTION:
Replace previously used special bolts, hex bolts and ground
bolt with new ones.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items
RS-25

Diagnosis Sensor Unit
REMOVAL AND INSTALLATIONNJRS0013CAUTION:
+Before servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
+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 ones.
+Check diagnosis sensor unit for proper installation.
+Check diagnosis sensor unit to ensure it is free of
deformities, dents, cracks or rust. If they show any visible
signs of damage, replace them with new ones.
+Check diagnosis sensor unit brackets to ensure they are
free of deformities or rust.
+Replace diagnosis sensor unit if it has been dropped or
sustained an impact.
+After replacement of diagnosis sensor unit, perform self-
diagnosis for SRS. Refer to ªSRS Operation Checkº for
details. (RS-59)
SRS964
1. Disconnect driver, front passenger and front side air bag mod-
ule connectors. Also, disconnect front seat belt pre-tensioner
connector.
2. Remove console box. Refer to BT-25, ªINSTRUMENT PANEL
ASSEMBLYº.
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and diagnosis sensor unit fixing bolts.
Use TAMPER RESISTANT TORX (Size T50) to remove spe-
cial bolts.
NOTE:
+To install, reverse the removal procedure sequence.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Diagnosis Sensor Unit
RS-26

SRS563-D
SRS863
Front Seat Belt Pre-tensioner
REMOVAL AND INSTALLATIONNJRS0036CAUTION:
+Before servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
+Check front seat front belt pre-tensioner with load limiter
for proper installation.
+After replacement of front seat belt pre-tensioner, check
SRS function and perform self-diagnosis for SRS.
Refer to ªSRS Operation Checkº for details. (RS-59)
+Do not attempt to disassemble front seat belt pre-ten-
sioner with load limiter.
+Replace front seat belt pre-tensioner if it has been
dropped or sustained an impact.
+Do not expose front seat belt pre-tensioner to tempera-
tures exceeding 80ÉC (176ÉF).
For removal of front seat belt pre-tensioner, refer to ªFront Seat
Beltº for details. (RS-5)
NOTE:
+To install, reverse the removal procedure sequence.
Side Air Bag (Satellite) Sensor
REMOVAL AND INSTALLATIONNJRS0014CAUTION:
+Before servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
+Do not use old bolts coated with bonding agent after
removal; replace with new ones.
+Check side air bag (satellite) sensor for proper installa-
tion.
+Check side air bag (satellite) sensor to ensure they are
free of deformities, dents, cracks or rust. If it shows any
visible signs of damage, replace it with new one.
+After replacement of side air bag (satellite) sensor, check
SRS function and perform self-diagnosis for SRS. Refer to
ªSRS Operation Checkº for details. (RS-59)
+Do not attempt to disassemble side air bag (satellite) sen-
sor.
+Replace side air bag (satellite) sensor if it has been
dropped or sustained an impact.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Front Seat Belt Pre-tensioner
RS-27

SRS965
1. Remove front seat belt pre-tensioner. Refer to ªFront Seat Beltº
for details. (RS-5)
2. Disconnect side air bag (satellite) sensor connector.
3. Remove bolt and nuts from side air bag (satellite) sensor unit.
Then remove the (satellite) sensor.
NOTE:
+To install, reverse the removal procedure sequence.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Side Air Bag (Satellite) Sensor (Cont'd)
RS-28

DIAGNOSIS MODE FOR CONSULT-II=NJRS0043S02+ªSELF-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.
+ªSELF-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.
+ªTROUBLE DIAG RECORDº
With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be displayed
on the CONSULT-II screen.
+ªECU 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.
For NISSAN MODEL N16, the diagnosis sensor unit classification numbers are as follows:
DESTINATION MODEL ECU DISCRIMINATED NO.
Europe4-DOOR SEDANModels with single air bag and seat belt pre-
tensionerA50E
Models with dual air bags and seat belt pre-
tensionerA50F
Models with dual air bags, side air bag and
seat belt pre-tensionerA510
3-DOOR HATCHBACKModels with single air bag and seat belt pre-
tensionerA917
Models with dual air bags and seat belt pre-
tensionerA904
Models with dual air bags, side air bag and
seat belt pre-tensionerA905
5-DOOR HATCHBACKModels with single air bag and seat belt pre-
tensionerA917
Models with dual air bags and seat belt pre-
tensionerA904
Models with dual air bags, side air bag and
seat belt pre-tensionerA918
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses Introduction (Cont'd)
RS-48

SRS800
SRS Operation CheckNJRS0047DIAGNOSTIC PROCEDURE 1NJRS0047S01Checking Air Bag Operation by Using ªAIR BAGº
Warning Lamp Ð User Mode
NJRS0047S01011. After turning ignition switch from ªOFFº to ªONº, ªAIR BAGº
warning lamp operates.
2. Compare ªAIR BAGº warning lamp operation to the chart
below.
ªAIR BAGº warning lamp operation Ð User mode Ð SRS condition Reference item
MRS095A
No malfunction is
detected. No further action
is necessary.
Ð
MRS096A
The system is malfunction-
ing and needs to be
repaired as indicated.Go to DIAGNOSTIC PRO-
CEDURE 2 or 6 (RS-60 or
RS-74).
MRS097A
Air bag or/and seat belt
pre-tensioner is deployed.Go to COLLISION DIAG-
NOSIS (RS-85).
Air bag fuse, diagnosis
sensor unit or harness is
malfunctioning and needs
to be repaired.Go to DIAGNOSTIC PRO-
CEDURE 9 (RS-82).
MRS098A
One of the following has
occurred and needs to be
repaired.
+Meter fuse is blown.
+ªAIR BAGº warning
lamp circuit has open
or short.
+Diagnosis sensor unit is
malfunctioning.Go to DIAGNOSTIC PRO-
CEDURE 10 (RS-84).
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS Operation Check
RS-59