2001 NISSAN PICK-UP Repair Manual

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along
with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal
collision. The SRS composition which is available to NISSAN MODEL D22 is as follows (The composition
varies according to the destination and optional equipment.):
Driver air bag module (located in the center of the steering wheel), front passenger air bag module (located
on the instrument panel on passenger side), seat belt pre-tensioner, a diagnosis sensor unit, warning lamp,
wiring harness and spiral cable.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow harness connector.
PRECAUTION
RS-3002

Precautions for SRS ªAIR BAGº and ªSEAT
BELT PRE-TENSIONERº Service
+Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
+Before servicing the SRS, turn ignition switch ªOFFº, disconnect battery ground cable 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.
+Diagnosis sensor unit must always be installed with their arrow marks ª
Sº 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.
+The 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.
+Handle air bag module carefully. Always place driver and passenger air bag modules with the pad side
facing upward.
+Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
+After 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
KV99108200
Deployment tool adapters for
seat belt pre-tensioner
NT721
KV99108300
Deployment tool adapters for
passenger air bag
NT776
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-3003

Tool number
Tool nameDescription
KV99109700
Deployment tool adapter for
driver air bag
JRS995
Commercial Service Tool
Tool name Description Specification
Tamper resistant torx
socket
NT757
Size: T30
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Special Service Tools (Cont'd)
RS-3004

Removal and Installation Ð Diagnosis
Sensor Unit
CAUTION:
+Before servicing SRS, turn the ignition switch off, disconnect battery ground cable and wait at
least 3 minutes.
+Do not use old bolts and nuts after removal; replace with new ones.
+Check diagnosis sensor unit for proper installation.
+Check 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.
+Check diagnosis sensor unit brackets to ensure they are free of deformities and rust.
+After replacement of diagnosis sensor unit, check SRS function and perform self-diagnosis for
SRS. Refer to ªSelf-diagnosisº for details. (RS-3020)
+Do not attempt to disassemble diagnosis sensor unit.
+Replace diagnosis sensor unit if it has been dropped or sustained an impact.
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver and passenger air bag module connectors.
Also, disconnect seat belt pre-tensioner connector (Models
for the Middle East).
2. Remove instrument panel. Refer to Service Manual (Pub.
No. SM9E-D22BE0E), ªINSTRUMENT PANELº in BT sec-
tion.
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:
+To install, reverse the removal procedure sequence.
+After replacement, perform self-diagnosis for SRS. Refer
to ªSelf-diagnosisº for details (RS-3020).
CAUTION:
+Do not use old hex bolts and ground bolt; replace with
new bolts and ground bolt.
SRS990
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-3005

Removal Ð Driver Air Bag Module and Spiral
Cable
CAUTION:
+Before servicing SRS, turn the ignition switch OFF, dis-
connect battery ground cable and wait at least 3 min-
utes.
+Always work from the side of air bag module.
1. Remove side lid. Using the TAMPER RESISTANT TORX
SOCKET (T30), remove left and right special bolts. Air bag
module can then be removed.
2. Remove the lower lid.
3. Disconnect the air bag harness connector. Then remove
driver air bag module.
CAUTION:
When removal of driver air bag module connector, insert the
lock using flat-blade driver with tape. Then push up the lock.
SRS397-B
PHIA0017E
SHIA0239E
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-3006

CAUTION:
+Always place air bag module with pad side facing
upward.
+Do not attempt to disassemble air bag module.
+Do not use old bolts after removal; replace with new
ones.
+Do not insert any foreign objects (screwdriver, etc.) into
air bag module connector.
+Replace air bag module if it has been dropped or sus-
tained an impact.
+Do not expose the air bag module to temperatures
exceeding 90ÉC (194ÉF).
+Do 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:
+Do 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:
+Do not attempt to disassemble spiral cable.
+Do 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.
SRS443
SBF814E
SBF239F
SRS384
SRS384
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal Ð Driver Air Bag Module and
Spiral Cable (Cont'd)
RS-3007

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).
CAUTION:
+The 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.
:29-39Nzm (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
8. Fix driver air bag module harness and harness connector to
clamp.
9. Connect air bag module connector and horn connector.
10. Position air bag module and tighten with new special bolts.
+Always service the air bag module from the side.
11. Install all lids.
12. Perform self-diagnosis to ensure entire SRS operates prop-
erly. (Use CONSULT-II or warning lamp check.) Refer to
RS-3020.
Before performing self-diagnosis, connect both battery
cables.
13. 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.
SRS165
SRS166
SHIA0144E
PHIA0017E
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Installation Ð Driver Air Bag Module and
Spiral Cable (Cont'd)
RS-3008

If air bag warning lamp blinks or stays ON (at the Usermode),
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.
14. Perform self-diagnosis again to check that no malfunction is
detected.
Removal Ð Front Passenger Air Bag Module
CAUTION:
+Before servicing SRS, turn the ignition switch off, dis-
connect battery ground cable and wait for at least 3 min-
utes.
+Always work from the side of or under air bag module.
1. Remove glove box assembly. Refer to ªINSTRUMENT
PANELº in BT section of Service Manual (Pub. No. SM9E-
D22BG0) for details.
2. Disconnect passenger air bag module connector.
3. Remove bolts and special hex using the TAMPER RESIS-
TANT TORX (Size T30) from front passenger air bag mod-
ule.
4. Remove instrument panel assembly. Refer to Service
Manual (Pub. No. SM9E-D22BE0E) ªINSTRUMENT PANELº
in BT section for details.
5. Remove air duct from instrument panel.
6. Remove the bolts from left and right sides of front passen-
ger air bag module. Then remove the air bag module from
the instrument panel assembly.
+The air bag module is heavy and should be supported using
both hands during removal.
CAUTION:
+Always place air bag module with pad side facing
upward.
+Do not attempt to disassemble air bag module.
+Do not use old bolts after removal; replace with new
bolts.
+Do not insert any foreign objects (screwdriver, etc.) into
air bag module connector.
+Replace air bag module if it has been dropped or sus-
tained an impact.
+Do not expose the air bag module to temperatures
exceeding 90ÉC (194ÉF).
+Do not allow oil, grease or water to come in contact with
the air bag module.
SRS991
SRS570
SBF814E
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Installation Ð Driver Air Bag Module and
Spiral Cable (Cont'd)
RS-3009