2002 NISSAN TERRANO g sensor

COMMERCIAL SERVICE TOOL
Tool name Description
Tamper resistant torx
socket
NT757
Size: T30
SRS Configuration
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 moduleqÐÐ
Front passenger air bag moduleqÐÐ
Front LH seat belt pre-tensionerqÐÐ
Front RH seat belt pre-tensionerqÐÐ
Front LH side air bag module ÐqÐ
Front RH side air bag module Ð Ðq
SRS585-D
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Preparation (Cont'd)
RS-8

SRS Component Parts Location
Maintenance Items
CAUTION:
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-36 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.
NRS102
SRS797-A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-10

IInstall driver air bag module to steering wheel to check fit or
alignment with the wheel.
ICheck steering wheel for excessive free play.
IInstall front passenger air bag module to instrument panel to
check fit or alignment with the instrument panel.
IInstall front side air bag module to seatback to check fit and
alignment 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, body harness, side air bag module sub-harness
ICheck connectors for poor connections, damage, and terminals
for deformities.
ICheck harnesses for binding, chafing or cut.
5) Front 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 ªAIR
BAGº warning lamp or CONSULT-II.
Refer to ªSRS Operation Checkº for details. (RS-36)
6) Side air bag (satellite) sensor
ICheck side air bag (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.
Diagnosis Sensor Unit
REMOVAL AND INSTALLATION
CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
IThe 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.
ICheck diagnosis sensor unit for proper installation.
ICheck 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.
ICheck diagnosis sensor unit brackets to ensure they are
free of deformities or rust.
IReplace diagnosis sensor unit if it has been dropped or
sustained an impact.
IAfter replacement of diagnosis sensor unit, perform self-
diagnosis for SRS. Refer to ªSRS Operation Checkº for
details. (RS-36)
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-22, ªINSTRUMENT PANEL
ASSEMBLYº.
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and also remove special bolts using the
TAMPER RESISTANT TORX (Size T50), from diagnosis sen-
sor unit.
Then remove the diagnosis sensor unit.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items (Cont'd)
RS-11

NOTE:
ITo install, reverse the removal procedure sequence.
Front Seat Belt Pre-tensioner
REMOVAL AND INSTALLATION
CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
ICheck front seat front belt pre-tensioner with load limiter
for proper installation.
IAfter replacement of front seat belt pre-tensioner, check
SRS function and perform self-diagnosis for SRS.
IRefer to ªSRS Operation Checkº for details. (RS-36)
IDo not attempt to disassemble front seat belt pre-tensioner
with load limiter.
IReplace front seat belt pre-tensioner if it has been dropped
or sustained an impact.
IDo 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-4)
NOTE:
ITo install, reverse the removal procedure sequence.
YRS071
YRS072
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Diagnosis Sensor Unit (Cont'd)
RS-12

Side Air Bag (Satellite) Sensor
REMOVAL AND INSTALLATION
CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
IDo not use old bolts coated with bonding agent after
removal; replace with new ones.
ICheck side air bag (satellite) sensor for proper installation.
ICheck 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.
IAfter replacement of side air bag (satellite) sensor, check
SRS function and perform self-diagnosis for SRS. Refer to
ªSRS Operation Checkº for details. (RS-36)
IDo not attempt to disassemble side air bag (satellite) sen-
sor.
IReplace side air bag (satellite) sensor if it has been
dropped or sustained an impact.
1. Remove front seat belt pre-tensioner. Refer to ªFront Seat Beltº
for details. (RS-4)
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:
ITo install, reverse the removal procedure sequence.
YRS077
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-13

INSTALLATION
1. Set the front wheels in the straight-ahead position.
2. Make sure that the spiral cable is in the neutral position.
The neutral position is detected by turning left (counterclock-
wise) about 2.5 revolutions from the right end position. Align the
two marks (
).
CAUTION:
IThe spiral cable may snap due to steering operation if the
cable is installed in an improper position.
IAlso, with the steering linkage disconnected, the cable
may snap by turning the steering wheel beyond the limited
number of turns. The spiral cable can be turned up to
about 2.5 turns from the neutral position to both the right
and left.
3. Connect spiral cable connector and tighten with screws.
4. Install steering column covers. And make sure the harness do
not get caught between inner steering cover and steering col-
umn.
5. Install steering wheel, aligning with spiral cable pin guides, and
pull spiral cable through.
6. Connect horn connector (or horn/audio connector) and engage
spiral cable with pawls in steering wheel. Move driver air bag
module connector away from steering wheel lower lid opening.
7. Tighten nut.
:30-40N×m (3.1 - 4.1 kg-m, 22 - 30 ft-lb)
8. Position driver air bag module and tighten with new special
bolts.
9. Connect driver air bag module connector and diagnosis sensor
unit connector.
10. Install steering switches and lids.
11. Conduct self-diagnosis to ensure entire SRS operates properly.
(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 position.
If ªAIR BAGº 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 CON-
SULT-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.
SRS983
NBF004
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Driver Air Bag Module and Spiral Cable
(Cont'd)
RS-16

Trouble Diagnoses Introduction
CAUTION:
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 FUNCTION
The 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-II
IªSELF-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 (refer to the table below). This number will be displayed on the CONSULT-II screen. When replacing
the diagnosis sensor unit, refer to the part number for the compatibility. After installation, replacement with
a correct unit can be checked by confirming this classification number on the CONSULT-II screen.
For NISSAN MODEL R20, the diagnosis sensor unit classification numbers are as follows:
MODEL ECU DISCRIMINATED NO.
Models with single air bag and seat belt pre-tensioner A928
Models with dual air bags and seat belt pre-tensioner A929
Models with dual air bags, side air bag and seat belt pre-tensioner A930
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-26

SRS Operation Check
DIAGNOSTIC PROCEDURE 1
Checking Air Bag Operation by Using ªAIR BAGº
Warning Lamp Ð User Mode
1. 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 neces-
sary.Ð
MRS096A
The system is malfunction-
ing and needs to be repaired
as indicated.Go to DIAGNOSTIC PRO-
CEDURE 2 or 6 (RS-37 or
RS-46).
MRS097A
Air bag or/and seat belt pre-
tensioner is deployed.Go to COLLISION DIAGNO-
SIS (RS-57).
Air bag fuse, diagnosis sen-
sor unit or harness is mal-
functioning and needs to be
repaired.Go to DIAGNOSTIC PRO-
CEDURE 9 (RS-54).
MRS098A
One of the following has
occurred and needs to be
repaired.
IMeter fuse is blown.
ªAIR BAGº warning lamp
circuit has open or short.
IDiagnosis sensor unit is
malfunctioning.Go to DIAGNOSTIC PRO-
CEDURE 10 (RS-56).
NOTE:
If ªAIR BAGº warning lamp operates differently from the
operations shown above, refer to ªAIR BAGº warning lamp
operation Ð Diagnosis mode Ð,DIAGNOSTIC PROCEDURE 6
(step 4), RS-46.
SRS800
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-36