1999 NISSAN PICK-UP Repair Manual

Precaution for Seat Belt Service
CAUTION:
lDo not disassemble buckle or seat belt assembly.
lReplace anchor bolts if they are deformed or worn out.
lNever oil tongue and buckle.
lIf any component of seat belt assembly is questionable, do not repair. Replace the whole seat
belt assembly.
lIf webbing is cut, frayed, or damaged, replace seat belt assembly.
lWhen replacing seat belt assembly, use a genuine seat belt assembly.
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
collision should also be replaced if either damage or improper operation is noted.
Replace any seat belt assembly if:
lThe seat belt was in use at the time of a collision (except for minor collisions and the belts, retractors
and buckles show no damage and continue to operate properly).
lThe seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide, etc.)
lThe 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.
lAnchor bolts are deformed or worn out.
SEAT BELTS
RS-2003

Precautions for SRS ``AIR BAG'' and ``SEAT
BELT PRE-TENSIONER'' Service
lDo not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
lBefore servicing the SRS, turn ignition switch ``OFF'', 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 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 ``S'' 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 and passenger air bag modules with the pad side
facing upward.
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
NT354
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)
KV99108300
Deployment tool adapters for
passenger air bag
NT776
*: Special tool or commercial equivalent
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-2004

Commercial Service Tool
Tool name Description Specification
Tamper resistant torx
socket
NT757
Size: T30
Description
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in the ``ON'' or ``START''
position.
NRS087
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-2005

SRS Component Parts Location
Maintenance Items
CAUTION:
Do not use electrical test equipment to check SRS circuit.
1. Check operation of ``AIR BAG'' warning lamp.
After turning ignition key to ``ON'' position, the warning lamp
illuminates. The ``AIR BAG'' 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 system. Refer to RS-2025 for details.
lThe ``AIR BAG'' warning lamp does not illuminate when the
ignition switch is turned ``ON''.
lThe ``AIR BAG'' warning lamp does not go off about 7 sec-
onds after the ignition switch is turned ``ON''.
lThe ``AIR BAG'' warning lamp blinks after about 7 seconds
after the ignition switch is turned ``ON''.
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
NRS088
SRS296
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-2006

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 air bag module to steering wheel to check fit or
alignment with the wheel.
lCheck steering wheel for excessive free play.
lInstall passenger air bag module to instrument panel to
check fit or alignment with the instrument panel.
(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 and air bag harness
lCheck connectors for poor connections, damage, and termi-
nals for deformities.
lCheck harnesses for binding, chafing or cut.
CAUTION:
Replace previously used special bolts and ground bolt with
new ones.
Removal and Installation Ð Diagnosis
Sensor Unit
CAUTION:
lBefore servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.
lDo not use old special bolts and nuts coated with bonding agent after removal; replace with new
ones.
lCheck diagnosis sensor unit for proper installation.
lCheck diagnosis sensor unit to ensure it is free of deformities, dents, cracks or rust. If it shows
any visible signs of damage, replace it with a new one.
lCheck diagnosis sensor unit brackets to ensure they are free of deformities and rust.
lAfter replacement of diagnosis sensor unit, check SRS function and perform self-diagnosis for
SRS. Refer to ``Self-diagnosis'' for details. (RS-2025)
lDo not attempt to disassemble diagnosis sensor unit.
lReplace diagnosis sensor unit and if it has been dropped or sustained an impact.
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver and passenger air bag module connectors.
2. Remove instrument panel. Refer to ``INSTRUMENT PANEL''
in BT section.
3. Remove air duct.
4. Disconnect diagnosis sensor unit connector.
5. Remove ground bolt and also remove special bolts using the
TAMPER RESISTANT TORX (Size T50), from diagnosis
sensor unit.
Then remove the diagnosis sensor unit.
NOTE:
lTo install, reverse the removal procedure sequence.
lAfter replacement, perform self-diagnosis for SRS. Refer
to ``Self-diagnosis'' for details (RS-2025).
CAUTION:
lDo not use old special bolts and ground bolt coated with
bonding agent; replace with new coated special bolts
and ground bolt.
SRS729
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items (Cont'd)
RS-2007

Removal Ð Driver Air Bag Module and Spiral
Cable
CAUTION:
lBefore servicing SRS, turn the ignition switch OFF, dis-
connect both battery cables and wait 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 lid. Using the TAMPER RESISTANT TORX
(Size T50) or TAMPER RESISTANT TORX SOCKET (T30),
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.
SRS397-A
SBF811E
SBF812E
SRS161
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-2008

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.
4. Disconnect horn connector and remove nuts.
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.
7. Remove the four screws. Then unlock the spiral cable con-
nector and disconnect connector. The spiral cable can then
be removed.
CAUTION:
lDo not attempt to disassemble spiral cable.
lDo not apply lubricant to the spiral cable.
Installation Ð Driver Air Bag Module and
Spiral Cable
1. Set the front wheels in the straight-ahead position.
2. Connect spiral cable connector. Then, lock the connector
and tighten with screws. Install steering column cover.
SBF814E
SBF239F
SRS384
SRS384
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal Ð Driver Air Bag Module and
Spiral Cable (Cont'd)
RS-2009

3. Make sure that the spiral cable is in the neutral position.
The neutral position is detected by turning left about 2.5
revolutions from the right end position. Align the two marks
(
,
s).
CAUTION:
lThe spiral cable may snap due to steering operation if
the cable is installed in an improper position.
Also, 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 about 2.5 turns from
the neutral position to both the right and left.
4. Connect spiral cable connector and tighten with screws.
Install steering column cover.
5. Install steering, wheel setting spiral cable pin guide, and pull
spiral cable through.
6. Connect horn connector and engage spiral cable with pawls
in steering wheel. Move air bag module connector away from
steering wheel lower lid opening.
7. Tighten nut.
: 29 - 39 (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
8. Position air bag module and tighten with new special bolts.
lAlways service the air bag module from the side.
9. Connect air bag module connector.
10. Install all lids.
11. Perform self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT or warning lamp check.) Refer to
RS-2025.
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 CON-
SULT 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.
SRS165
SRS166
SBF812EE
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Installation Ð Driver Air Bag Module and
Spiral Cable (Cont'd)
RS-2010