NISSAN PRIMERA 1999 Electronic Repair Manual

Precautions for SRS ªAIR BAGº and ªSEAT
BELT PRE-TENSIONERº Service
lDo not use electrical test equipment to check the SRS unless instructed to do in this Service Manual.
lBefore 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.
lDiagnosis sensor unit must always be installed with their arrow marks ªSº 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.
lThe 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.
lHandle air bag module carefully. Always place driver's and passenger's air bag modules with the pad
side facing upward and place side air bag module (built-in type) standing with stud bolt side setting bot-
tom.
lConduct self-diagnosis to check entire SRS for proper function after replacing any components.
lAfter air bag inflates, the front instrument panel assembly should be replaced if damaged.
Special Service Tools
Tool number
Tool nameDescription
KV99106400
Deployment tool
NT357
Disposing of air bag module
KV99105300
Air bag module bracket
NRS016
Anchoring air bag module
HT61961000 and
HT62152000 combined
*Special torx bit
NT361
Use for special bolts
[TAMPER RESISTANT TORX (Size T50)]
a: 3.5 (0.138) dia.
b: 8.5 - 8.6 (0.335 - 0.339) dia.
c: approx. 10 (0.39) sq.
Unit: mm (in)
Tamper resistant torx
socket
NT757
Size: T30
*: Special tool or commercial equivalent
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-8

Tool number
Tool nameDescription
KV99108200
Deployment tool adapter
for front seat belt pre-
tensioner
NT796For front seat belt
- pre-tensioner
KV99108300
Deployment tool adapt-
ers for Passenger and
built-in type side air bag
modules
NT744For passenger airbag module
and side airbag
*: Special tool or commercial equivalent
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Special Service Tools (Cont'd)
RS-9

Description
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in ªONº or ªSTARTº
position.
The collision modes for which supplemental restraint systems are activated are different among the SRS
systems. For example, the driver's air bag module and passenger's air bag module are activated in a fron-
tal 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's air bag moduleqÐÐ
Passenger's air bag moduleqÐÐ
Seat belt pre-tensioner (Driver's side)qÐÐ
Seat belt pre-tensioner (Passenger's side)qÐÐ
Side air bag module (LH) ÐqÐ
Side air bag module (RH) Ð Ðq
SRS585 Seat belt pre-tensioner
(Driver's side)
Satellite sensor (LH)
(G sensor for side
air bag LH)Diagnosis sensor unit
lAuxiliary power source (condenser)
lDrive circuit
lCPU
lG sensor
(for driver's and passenger's air bags,
seat belt pre-tensioner)
lSafing sensor
(for driver's and passenger's air bags,
seat belt pre-tensioner)
lSafing sensor
(for side air bag) Side air bag module (LH)
(Built-in type)Side air bag module
(RH) (Built-in type) Satellite sensor (RH)
(G sensor for side air bag
RH) Driver's air bag
modulePassenger's air bag
module
Seat belt pre-tensioner
(passenger's side)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-10

Built-in Type Side Air Bag
Front side air bag is built-in type.
The front seat back with built-in type side air bag has the labels
as shown on the left figure.
SRS Component Parts Location
NRS059
.Front seat back with front side air bag
(Built-in type)
NRS125 Passenger's air bag module
Driver's air bag module
Satellite sensors Spiral cable
Wiring harness
.Seat belt preten-
sioner retractors
.Diagnosis
sensor unit
.Side air bag modules
(Built-in type)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-11

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, the 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 following warning lamp conditions occur, imme-
diately check the air bag system. Refer to ªSRS-Operation
Checkº for details. (RS-37)
lThe ªAIR BAGº warning lamp does not come on when the
ignition switch is turned ªONº.
lThe ªAIR BAGº warning lamp does not go off about 7 sec-
onds after the ignition switch is turned ªONº.
lThe ªAIR BAGº warning lamp blinks about 7 seconds after
the ignition switch is turned ªONº.
2. Visually check SRS components.
(1) Diagnosis sensor unit
lCheck diagnosis sensor unit and bracket for dents, cracks or
deformities.
lCheck connectors for damage, and terminals for deformities.
(2) Air bag module and steering wheel
lRemove air bag module from steering wheel, instrument
panel or seat back. Check harness cover and connectors for
damage, terminals for deformities, and harness for binding.
lInstall driver's air bag module to steering wheel to check fit
or alignment with the wheel.
lCheck steering wheel for excessive free play.
lInstall passenger's air bag module to instrument panel to
check fit or alignment with the instrument panel.
lInstall side air bag module to seatback to check fit and align-
ment with the seat.
(3) Spiral cable
lCheck spiral cable for dents, cracks, or deformities.
lCheck connectors and protective tape for damage.
lCheck steering wheel for noise, binding or heavy operation.
(4) Main harness, body harness and air bag harness
lCheck connectors for poor connections, damage, and termi-
nals for deformities.
lCheck harnesses for binding, chafing or cuts.
(5) Seat belt pre-tensioner
lCheck harness cover and connectors for damage, terminals
for deformities, and harness for binding.
lCheck belts for damage and anchors for loose mounting.
lCheck retractor for smooth operation.
lPerform self-diagnosis for seat belt pre-tensioner using ªAIR
BAGº warning lamp or CONSULT-II. Refer to ªSRS Operation
Checkº for details. (RS-37)
(6) Side airbag (Satellite) sensor
lCheck Side airbag (Satellite) sensor (including bracket por-
tion) for dents, cracks or deformities.
lCheck connectors for damage, and terminals for deformities.
SRS797-A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-12

CAUTION:
Replace previously used special bolts, ground bolt and nuts
coated with bonding agent and also the anchor bolt with
new ones.
Removal and Installation Ð Diagnosis
Sensor Unit, Seat Belt Pre-tensioner and
Satellite Sensor
CAUTION:
lBefore servicing SRS, turn the ignition switch ªOFFº, disconnect both battery cables and wait at
least 3 minutes.
lThe 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.
lCheck diagnosis sensor unit, seat belt pre-tensioner and satellite sensor for proper installation.
lCheck diagnosis sensor unit and satellite sensor to ensure they are free of deformities, dents,
cracks or rust. If it shows any visible signs of damage, replace them with new ones.
lCheck diagnosis sensor unit brackets to ensure they are free of deformities and rust.
lAfter replacement of diagnosis sensor unit, seat belt pre-tensioner and satellite sensor check
SRS function and perform self-diagnosis for SRS. Refer to ªSRS Operation Checkº for details.
(RS-37)
lDo not attempt to disassemble diagosis sensor unit,seat belt pre-tensioner and satellite sensor
lReplace diagnosis sensor unit, seat belt pre-tensioner and satellite sensor if it has been dropped
or sustained an impact.
lDo not expose seat belt pre-tensioner to temperatures exceeding 80ÉC (176ÉF).
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver's, passenger's- and side air bag module
connectors. Also, disconnect seat belt pre-tensioner connec-
tor.
2. Remove lower instrument center panel. Refer to ªINSTRU-
MENT PANELº in BT section.
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and the special bolts by using the
TAMPER RESISTANT TORX (Size T50), from diagnosis sen-
sor unit.
Then remove the diagnosis sensor unit.
NOTE:
lTo install, reverse the removal procedure sequence.
lDiagnosis sensor unit must always be installed with
their arrow marks ª
Sº pointing towards the front of the
vehicle for proper installation.
REMOVAL OF SEAT BELT PRE-TENSIONER
For removal of seat belt pre-tensioner, refer to ªFront Seat Beltº
for details. (RS-3)
NOTE:
lTo install, reverse the removal procedure sequence.
NRS061
Diagnosis sensor unit
.Forward mark
Ground
bolt
FRONTSpecial bolt15-25N´m
(1.5 - 2.5 kg-m, 11 - 18 ft-lb)
NRS062
.5.1 - 6.3 N´m
(0.52 - 0.64 kg-m,
45 - 56 in-lb)
.Seat belt
pre-tensioner
.Connector.Anchor bolt43-55N´m
(4.4 - 5.6 kg-m,
32 - 41 ft-lb)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-13

REMOVAL SATELLITE SENSOR
1. Remove seat belt pre-tensioner. Refer to ªFront Seat Beltº for
details. (RS-3)
2. Disconnect satellite sensor connector.
3. Remove bolt and nuts from satellite sensor unit. Then
remove the satellite sensor.
NOTE:
lTo install, reverse the removal procedure sequence.
Removal Ð Air Bag Module and Spiral Cable
NRS126
7-13
(0.8 - 1.3,
62 - 115)
14.5 - 24.5
(1.5 - 2.5,
11 - 18)
.Ground bolt2.94 - 4.9
(0.30 - 0.50,
26 - 43)
: N´m (kg-m, ft-lb)
: N´m (kg-m, in-lb)Connector
NRS123 Side lid RH
(where fitted) Audio steering switch
(where fitted)
Side lid RH
29-39N´m
(3.0 - 4.0 kg-m, 22 - 29 ft-lb) Spiral
cable
Combination switch
Side lid LHSpecial bolt
7.8 - 13.7 N´m (0.8 - 1.4 kg-m, 69 - 121 in-lb)Lower lid
SEC. 253×484
Air bag module Special bolt
7.8 - 13.7 N´m (0.8 - 1.4 kg-m, 69 - 121 in-lb)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal and Installation Ð Diagnosis
Sensor Unit, Seat Belt Pre-tensioner and
Satellite Sensor (Cont'd)
RS-14

CAUTION:
lBefore servicing SRS, turn the ignition switch ªOFFº,
disconnect both battery cables and wait for at least 3
minutes.
lAlways work from the side of air bag module.
1. Remove lower lid from steering wheel, and disconnect air
bag module connector.
2. Remove side lids. Using the TAMPER RESISTANT TORX
(Size T50), remove left and right special bolts.
Air bag module can then be removed.
CAUTION:
lAlways place air bag module with pad side facing
upward.
lDo not attempt to disassemble air bag module.
lThe special bolts are coated with bonding agent. Do not
use old bolts after removal; replace with new ones.
lDo not insert any foreign objects (screwdriver, etc.) into
air bag module connector.
lReplace air bag module if it has been dropped or sus-
tained an impact.
lDo not expose the air bag module to temperatures
exceeding 90ÉC (194ÉF).
lDo not allow oil, grease or water to come in contact with
the air bag module.
3. Set steering wheel in the neutral position, with the front
wheels straight ahead.
4. Disconnect horn connector and remove nut.
5. Using steering wheel puller, remove steering wheel. Be care-
ful not to over-tighten puller bolt on steering wheel.
CAUTION:
lDo not tap or bump the steering wheel.
6. Remove steering column cover.
SBF811E
SBF812E Special bolt
SRS443 Up
SBF814E Air bag
module
SBF239F
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal Ð Air Bag Module and Spiral Cable
(Cont'd)
RS-15

7. Disconnect connector and remove the four screws. The spi-
ral cable can then be removed.
CAUTION:
lDo not attempt to disassemble spiral cable.
lDo not apply lubricant to the spiral cable.
Installation Ð Air Bag Module and Spiral
Cable
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 (clock wise) about
3.5 revolutions from the right end position. Align the two
marks (
) or make sure the white indicator is visible in the
upper part of the indicator window, with the cable pointed
down wards.
CAUTION:
lThe spiral cable may snap during steering operation if
the cable is installed incorrectly.
lAlso, with the steering linkage disconnected, the cable
may snap by turning the steering wheel beyond the lim-
ited number of turns.
(The spiral cable can be turned up to 3.5 turns from the
neutral position to both the right and left.)
3. Connect spiral cable connector and tighten with screws.
Install steering column cover.
4. Install steering wheel setting spiral cable pin guides, and pull
spiral cable through.
5. Connect horn connector and engage spiral cable with pawls
in steering wheel. Move other connectors away from steer-
ing wheel lower lid opener.
6. Tighten nut.
: 29 - 39 N´m (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
7. Position the driver's air bag module and tighten with new
special bolts.
lAlways service the air bag module from the side.
8. Connect other connectors.
9. Install all lids and steering switch (where fitted).
10. Connect both battery cables.
11. Conduct self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT-II or warning lamp check.)
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.
SRS384 Unlock
LockConnector
NRS121
Neutral
positionRight end
Indicator not
visible
Indicator win-
dow
Indicator is vis-
ible
Indicator
window
SRS076
SBF812EA Special bolt
7.8 - 13.7 N´m
(0.8 - 1.4 kg-m,
57 - 99 ft-lb)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal Ð Air Bag Module and Spiral Cable
(Cont'd)
RS-16

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 spi-
ral cable with a new one.
13. Perform self-diagnosis again to check that no malfunction is
detected.
Removal Ð Front Passenger's Air Bag
Module
CAUTION:
lBefore servicing SRS, turn the ignition switch ªOFFº,
disconnect both battery cables and wait at least 3 min-
utes.
lAlways work from the side of or under air bag module.
1. Open the glove box lid.
2. Disconnect inflator connector from body harness air bag con-
nector.
3. Remove glove box assembly. Refer to ªINSTRUMENT
PANELº in BT section for details.
4. Remove the bolts and special bolts using the TAMPER
RESISTANT TORX (Size T50) from front passenger's air bag
module.
Take out the air bag module from the instrument panel.
lThe air bag module is heavy and should be supported using
both hands during removal.
CAUTION:
lAlways place air bag module with pad side facing
upward.
lDo not attempt to disassemble air bag module.
lThe special bolts are coated with bonding agent. Do not
use old bolts after removal; replace with new coated
bolts.
lDo not insert any foreign objects (screwdriver, etc.) into
air bag module connector.
.NRS009
.Connector
.NRS010
.Remove special bolts
NRS124
5.2 - 7.0 N´m
(0.53 - 0.71 kg-m,
46 - 61 in-lb)
5.2 - 7.0 N´m
(0.53 - 0.71 kg-m,
46 - 61 in-lb)
NRS011 Nuts
Passenger's air bag moduleBolts
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Installation Ð Air Bag Module and Spiral
Cable (Cont'd)
RS-17