1998 NISSAN PICK-UP Repair Manual

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

Wiring Diagram Ð SRS Ð
HRS034
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
2WD models
RS-18

Self-diagnosis
DIAGNOSTIC PROCEDURE (without CONSULT)
Checking SRS operation by using ``AIR BAG'' warning lamp
Ð User mode
1. After turning ignition switch from ``OFF'' to ``ON'', ``AIR BAG''
warning lamp operates.
2. Compare ``AIR BAG'' warning lamp operation to the chart
below.
Note: CONSULT cannot be used for trouble diagnoses.
``AIR BAG'' warning lamp operation Ð User mode
SRS405
MRS106
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
2WD models
RS-19

REPAIR PROCEDURES
CAUTION:
Before servicing air bag, turn the ignition switch off and disconnect both battery cables and wait at
least 3 minutes.
Warning lamp operation Explanation Repair order
Warning lamp blinks.*Open or short in the air bag module cir-
cuit.1. Visually check the wiring harness and connectors.
2. Replace air bag module.
3. Replace steering wheel assembly (including diagnosis
sensor unit). Malfunctioning diagnosis sensor unit
Warning lamp does not illu-
minate at all.Meter fuse is blown.
1. Check meter fuse.
2. Visually check the wiring harnesses and connectors.
3. Check warning lamp LED.
4. Replace spiral cable.
5. Replace steering wheel assembly (including diagnosis
sensor unit).
6. Replace combination meter. Open in the warning lamp power supply
circuit
Short circuit between the warning lamp
and diagnoses sensor unit.
Malfunctioning LED
Malfunctioning combination meter
Malfunctioning diagnosis sensor unit
Warning lamp is continu-
ously ON.SRS air bag fuse is blown.1. Check air bag fuse.
2. Visually check the wiring harnesses and connectors for
combination meter, diagnosis sensor unit and spiral
cable.
3. Replace spiral cable.
4. Replace steering wheel assembly (including diagnosis
sensor unit). Open in circuit between the warning
lamp and diagnoses sensor unit.
Malfunctioning diagnosis sensor unit
*: After air bag is deployed, the warning lamp might blink due to an open circuit in the air bag module.
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is eliminated
using the air bag warning lamp each time repair is finished. If malfunction is still observed, proceed to the next step. When
malfunction is eliminated, further repair work is not required.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
2WD models
Self-diagnosis (Cont'd)
RS-20

To repair the SRS ``AIR BAG'', perform the following steps:
When SRS is activated in a collision:
V1Remove the air bag module.
V2Remove the steering wheel assembly.
V3Check the spiral cable using the table shown below:
lIf the spiral cable shows any visible damage such as dents, cracks, or deformation, replace it with
a new one.
V4Install new steering wheel assembly.
V5Install new air bag module.
V6Conduct self-diagnosis using ``AIR BAG'' warning lamp to ensure that entire SRS operates properly.
Refer to RS-19 for details.
When SRS is not activated in a collision:
V1Check the SRS components using the table shown below:
lIf the SRS components show any visible damage such as dents, cracks, or deformation, replace
them with new ones.
V2Conduct self-diagnosis using ``AIR BAG'' warning lamp to ensure that entire SRS operates properly.
Refer to RS-19 for details.
SRS inspection
Part SRS is activated SRS is NOT activated
Air bag module REPLACE
Install with new
bolts.1. Remove air bag module. Check harness cover and connectors for damage, ter-
minals for deformities, and harness for binding.
2. Install air bag module into the steering wheel to check fit and alignment with the
wheel.
3. No damage found, reinstall with new bolts.
4. If damagedÐREPLACE. Air bag must be deployed before discarding.
Steering wheel
assembly (including
diagnosis sensor
unit)REPLACE 1. Visually check steering wheel for deformities.
2. Check harness and connectors for damage, and terminals for deformities.
3. Check diagnosis sensor unit for dents, cracks or deformities.
Do not remove diagnosis sensor unit from steering wheel.
4. Install air bag module to check fit or alignment with steering wheel.
5. If no damage is found, reinstall the steering wheel assembly.
6. If damagedÐREPLACE.
Spiral cable 1. Check spiral cable for dents, cracks or deformities.
2. Check connectors and protective tape for damage.
3. Check steering wheel for noise, binding or heavy operation.
4. If no damage is found, reinstall it.
5. If damagedÐREPLACE.
Harness and Con-
nectors1. Check connectors for poor connection, damage, and terminals for deformities.
2. Check harness for binding, chafing, cuts, or deformities.
3. If no damage is found, reinstall the harness and connectors.
4. DamagedÐREPLACE damaged section of harness. Do not attempt to repair, splice or modify any SRS
harness.
COLLISION DIAGNOSIS Ð 2WD models
RS-21