NISSAN PICK-UP 1998 Repair Manual

SRS Component Parts Location
SRS394
SRS395
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-8

Maintenance Items
CAUTION:
Do not use a circuit tester to check SRS circuit.
1. Check ``AIR BAG'' warning lamp operation.
After turning ignition key to ``ON'' position, ``AIR BAG'' warn-
ing lamp 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 occur,
immediately check the air bag system. Refer to RS-28 (4WD
models), RS-19 (2WD models) for details.
lThe warning lamp does not illuminate when the ignition
switch is turned ``ON''.
lThe warning lamp does not turn off about 7 seconds after the
ignition switch is turned ``ON''.
lThe warning lamp blinks 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
lRemove air bag module from steering wheel. Check harness
cover and connectors for damage, terminals for deformities,
and harness for binding.
lInstall driver side air bag module to steering wheel to check
fit and alignment with the wheel.
lCheck steering wheel for excessive free play.
(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.
SRS296
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-9

Removal and Installation Ð Diagnosis
Sensor Unit (4WD models)
CAUTION:
lBefore servicing SRS, turn the ignition switch off, disconnect both battery cables and wait for 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 for proper installation.
lCheck diagnosis sensor unit to ensure they are free of deformities, dents, cracks or rust. If they
show any visible signs of damage, replace them with new ones.
lCheck diagnosis sensor unit brackets to ensure they are free of deformities or rust.
lReplace diagnosis sensor unit if it has been dropped or sustained an impact.
lAfter replacement of diagnosis sensor unit, perform self-diagnosis for SRS. Refer to ``Self-diag-
nosis'' for details (RS-28).
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect air bag module connector.
2. Remove console box. Refer to ``INSTRUMENT PANEL'' in
BT section. (4WD Double Cab models)
3. Remove console bracket.
4. Disconnect diagnosis sensor unit connector.
5. Remove 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.
SRS396
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-10

Removal and Installation Ð Air Bag Module
and Spiral Cable (4WD models)
Removal and Installation Ð Air Bag Module
and Spiral Cable (2WD models)
SRS397
SRS398
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-11

Removal Ð Air Bag Module and Spiral Cable
CAUTION:
lBefore servicing SRS, turn the ignition switch off, dis-
connect both battery cables and wait for at least 3 min-
utes.
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 mod-
ule 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.
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 (Dual Air Bag System)/spiral
cable steering connector (Single Air Bag System) 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. Disconnect connectors and remove the four screws. The spi-
ral cable can then be removed.
SBF811E
SBF812E
MRS120A
SBF814E
SBF239F
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-12

CAUTION:
lDo not attempt to disassemble spiral cable.
lDo not apply lubricant to the spiral cable.
lFor 2WD models, do not separate diagnosis sensor unit
from steering wheel.
Installation Ð Air Bag Module and Spiral
Cable
1. Set the front wheels in the straight-ahead position.
2. Connect spiral cable connector and tighten spiral cable with
screws. Install steering column cover.
CAUTION:
lThe spiral cable may snap due to steering operation if
the cable is installed in an improper position.
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 left
about 2.5 turns from the right end position.
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
(
,
m).
4WD MODELS
4. Install steering wheel setting spiral cable pin guide, and pull
spiral cable through.
5. Connect horn connector and engage spiral cable with pawls
in steering wheel.
6. Tighten nut.
:29-39Nzm (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
2WD MODELS
4. Install steering wheel setting spiral cable pin guide, and pull
spiral cable through.
5. Connect spiral cable steering connector to diagnosis sensor
unit in steering wheel.
6. Tighten nut.
:29-39Nzm (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
SRS399
SRS166-B
MBF648BB
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal Ð Air Bag Module and Spiral Cable
(Cont'd)
RS-13

7. Position air bag module and tighten with new special bolts.
8. Connect air bag module connector.
9. Install all lids.
10. Conduct self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT or warning lamp check.)
Before performing self-diagnosis, connect both battery
cables.
11. 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 CONSULT or
warning lamp). If a malfunction is detected, replace the spi-
ral cable with a new one.
Disposal of Air Bag Module
lBefore disposing of air bag modules or vehicles equipped with such a system, deploy the system. If such
a system has already been deployed due to an accident, dispose of as indicated in ``DISPOSING OF
AIR BAG MODULE'' (RS-16).
lWhen deploying the air bag module, always use the Special Service Tool; Deployment tool KV99106400.
lWhen deploying the air bag module stand at least 5 m (16 ft) away from the deployment component.
lWhen deploying the air bag module, a fairly loud noise is made, followed by smoke being released. The
smoke is not poisonous, however, be careful not to inhale smoke since it irritates throat and can cause
choking.
lAlways activate one air bag module at a time.
lDue to heat, leave air bag module unattended for more than 30 minutes after deployment.
lBe sure to wear gloves when handling a deployed air bag module.
lNever apply water to a deployed air bag module.
lWash your hands clean after finishing work.
lPlace the vehicle outdoors with an open space of at least 6 m (20 ft) on all sides when deploying the
air bag module while mounted in vehicle.
lUse a voltmeter to make sure the vehicle battery is fully charged.
lDo not dispose of the air bag module un-deployed.
CHECKING DEPLOYMENT TOOL
Connecting to battery
CAUTION:
The battery must show voltage of 9.6V or more.
Remove the battery from the vehicle and place it on dry wood
blocks approximately 5 m (16 ft) away from the vehicle.
lWait 10 to 12 minutes after the vehicle battery is discon-
nected before proceeding.
lConnect red clip of deployment tool to battery positive termi-
nal and black clip to negative terminal.
Make sure the polarity is correct. The right side lamp in the
tool, marked ``deployment tool power'', should glow with a
green light. If the right side lamp glows red, reverse the
connections to the battery.
SBF812EA
SRS005-B
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Installation Ð Air Bag Module and Spiral
Cable (Cont'd)
RS-14

Deployment tool check
Press the deployment tool switch to the ``ON'' position. The left
side lamp in the tool, marked ``air bag connector voltage'' should
illuminate. If it does not illuminate, replace the tool.
Air bag deployment tool lamp illumination chart
(Battery connected)
Switch operationLeft side lamp, green*
``AIR BAG CONNEC-
TOR VOLTAGE''Right side lamp, green*
``DEPLOYMENT TOOL
POWER''
OFF OFF ON
ON ON ON
*: If this lamp glows red, the tool is connected to the battery incorrectly.
Reverse the connections and make sure the lamp glows green.
DEPLOYMENT PROCEDURES FOR AIR BAG
MODULE (OUTSIDE OF VEHICLE)
Unless the vehicle is being scrapped, deploying the air bag in the
vehicle is not recommended. This may cause damage to the
vehicle interior.
Anchor air bag module in a vise secured to a firm foundation
during deployment.
Deployment of driver's air bag module (outside of
vehicle)
1. Using wire, secure air bag module to air bag module bracket
(SST: KV99105300).
CAUTION:
Use wire of at least 1 mm (0.04 in) diameter.
2. Firmly secure air bag module bracket (SST: KV99105300)
with air bag module attached, in a vise.
3. Connect deployment tool (SST: KV99106400) to air bag
module connector.
SBF266H
SRS232-B
SRS233-B
SRS234-B
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Disposal of Air Bag Module (Cont'd)
RS-15

4. Connect red clip of deployment tool to battery positive termi-
nal and black clip to negative terminal.
5. The lamp on the right side of the tool, marked ``deployment
tool power'', should glow green, not red.
6. Press the button on the deployment tool. The left side lamp
on the tool, marked ``air bag connector voltage'', will illumi-
nate and the air bag module will deploy.
CAUTION:
When deploying the air bag module, stand at least5m(16
ft) away from the air bag module.
DEPLOYMENT OF AIR BAG MODULE WHILE
MOUNTED IN VEHICLE
When disposing of a vehicle, deploy air bag module while it is
mounted in vehicle.
CAUTION:
When deploying air bag module, ensure vehicle is empty.
1. Disconnect both battery cables and wait 3 minutes.
2. Disconnect air bag module connector.
3. Connect deployment tool (SST: KV99106400) to air bag
module.
4. Connect red clip of deployment tool to battery positive termi-
nal and black clip to negative terminal.
5. The lamp on the right side of the tool, marked ``deployment
tool power'', should glow green, not red.
6. Press the button on the deployment tool. The left side lamp
on the tool, marked ``air bag connector voltage'', will illumi-
nate and the air bag module will deploy.
CAUTION:
lPlace the vehicle outdoors with an open space of at least
6 m (20 ft) on all sides when deploying the air bag mod-
ule while mounted in the vehicle.
DISPOSING OF AIR BAG MODULE
Deployed air bag module is very hot. Before disposing of air bag
module, wait at least 30 minutes. Seal it in a plastic bag before
disposal.
CAUTION:
lNever apply water to a deployed air bag module.
lBe sure to wear gloves when handling a deployed air
bag module.
lNo poisonous gas is produced upon air bag module
deployment. However, be careful not to inhale gas since
it irritates throat and can cause choking.
lDo not attempt to disassemble air bag module.
lAir bag module cannot be re-used.
lWash your hands clean after finishing work.
SRS235-B
SBF240F
SRS006-B
SBF276H
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Disposal of Air Bag Module (Cont'd)
RS-16

How to Perform Trouble Diagnoses for Quick
and Accurate Repair
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a problem. It is important to fully understand the symptoms
or conditions for a customer complaint.
INFORMATION FROM CUSTOMER
WHAT ........ Vehicle model
WHEN ....... Date, Frequencies
WHERE ..... Road conditions
HOW .......... Operating conditions, Symptoms
PRELIMINARY CHECK
Check that the following parts are in good order.
lBattery [Refer to MA section (``GENERAL MAINTENANCE'').]
lFuse [Refer to EL section (``Fuse'', ``POWER SUPPLY ROUTING'').]
lSystem component-to-harness connections
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using ``AIR BAG'' warning lamp.
Note: CONSULT cannot be used for trouble diagnoses.
CAUTION:
lDo not use a circuit tester to check SRS harness connectors unless instructed to in this Service
Manual.
lDo not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged,
replace it with a new one.
lKeep ground portion clean.
WORK FLOW
ACTION ITEMREFERENCE ITEM
Check in
Listen to customer complaints and requests.
Perform preliminary check.bPreliminary check (RS-17)
cPerform self-diagnosis using ``AIR BAG'' warning lamp.bDIAGNOSTIC PROCEDURE
(RS-19)
Repair/Replace
NGFinal check Ð Self-diagnosis using ``AIR BAG'' warning lamp.
OK
bDIAGNOSTIC PROCEDURE
(RS-19)
Check out
.
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
2WD models
RS-17