NISSAN PATROL 2000 Electronic Repair Manual

Wiring Diagram
TRA001
STABILIZER RELEASE DEVICE
RA-1002

TRA001M
STABILIZER RELEASE DEVICE
Wiring Diagram (Cont'd)
RA-1003

RESTRAINT SYSTEM
SECTION
RS
MODIFICATION NOTICE:
+Side air bag has been adopted as optional equipment.
+Diagnosis sensor unit has been changed.
+Seat belt pre-tensioner with load limiter has been added.
+Deployment procedure of seat belt pre-tensioner has been changed.
CONTENTS
PRECAUTION...................................................... 1002
Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº ... 1002
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)1003
Precautions for SRS ªAIR BAGº and ªSEAT
BELT PRE-TENSIONERº Service ................... 1003
Special Service Tools ...................................... 1003
Description ....................................................... 1004
Built-in Type Side Air Bag ............................... 1004
Seat Belt Pre-tensioner with Load Limiter ....... 1005
SRS Component Parts Location...................... 1005
Maintenance Items........................................... 1006
Removal and Installation Ð Diagnosis Sensor
Unit, Seat Belt Pre-tensioner with Load Limiter
and Satellite Sensor......................................... 1008
Removal Ð Driver Air Bag Module and Spiral
Cable ................................................................ 1009Installation Ð Driver Air Bag Module and
Spiral Cable ..................................................... 1011
Removal Ð Side Air Bag Module.................... 1012
Installation Ð Side Air Bag Module................. 1013
Disposal of Air Bag Module and Seat Belt
Pre-tensioner.................................................... 1015
TROUBLE DIAGNOSES Ð Supplemental
Restraint System (SRS)..................................... 1019
Trouble Diagnoses Introduction ....................... 1019
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ........................................ 1021
Schematic ........................................................ 1023
Wiring Diagram Ð SRS Ð/LHD Models ......... 1024
Wiring Diagram Ð SRS Ð/RHD Models ........ 1028
Self-diagnosis................................................... 1032
Trouble Diagnoses for Air Bag Warning Lamp1050
COLLISION DIAGNOSIS..................................... 1052

RS

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 for certain
types of collision. The SRS composition which is available to NISSAN MODEL Y61 is as follows (The com-
position varies according to the destination and optional equipment.):
+For a frontal collision
The Supplemental Restraint System consists of 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-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
+For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of
front seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision),
wiring harness, warning lamp (one of components of air bags for a frontal collision).
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 should 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. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTION
RS-1002

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 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.
+Diagnosis 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.
+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 and front side air bag modules (built-in type) with the stud bolt side facing down.
+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
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
built-in type side air bag and
passenger air bag modules
NT780
KV99108200 (KV999R0020)
Deployment tool adapters for
seat belt pre-tensioner
NT721
*: Special tool or commercial equivalent
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-1003

Description
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in the ªONº or ªSTARTº
position.
The collision modes for which supplemental restraint systems are activated are different among the SRS
systems. For example, the driver air bag module and passenger air bag module are activated in a frontal
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 air bag modulejÐÐ
Passenger air bag modulejÐÐ
Seat belt pre-tensioner (Driver side)jÐÐ
Seat belt pre-tensioner (Passenger side)jÐÐ
Side air bag module (LH) ÐjÐ
Side air bag module (RH) Ð Ðj
Built-in Type Side Air Bag
Front side air bag is built-in type.
The front seat backs with built-in type side air bag have the labels
shown in figures at left.
SRS585-A
SRS755
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-1004

Seat Belt Pre-tensioner with Load Limiter
The seat belt pre-tensioner system with load limiter is installed
to both the driver's seat and the front passenger's seat. It oper-
ates simultaneously with the SRS air bag system in the event of
a frontal collision with an impact exceeding a specified level.
When a frontal collision with an impact exceeding a specified
level occurs, seat belt slack resulting from clothing or other fac-
tors is immediately taken up by the pre-tensioner. Vehicle pas-
sengers are securely restrained.
When passengers in a vehicle are thrown forward in a collision
and the restraining force of the seat belt exceeds a specified
level, the stopper-A pin will break, allowing the ring gear to
rotate. At this point, resistance force from the belt housing is
applied to the wire attached to the ring gear so that the wire
keeps a constant level of tension (resistance against further rota-
tion of the ring gear in the normal direction). As the ring gear
stopper-A rotates and reaches the stopper-B position, it will
cease its rotation, causing the seat belt webbing to stop extend-
ing. By the mechanism previously described, the load limiter
permits the specified extension of the seat belt and a relaxation
of the chest-area seat belt web tension while maintaining force.
SRS Component Parts Location
SRS501
SRS756
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-1005

Maintenance Items
CAUTION:
Do not use electrical test equipment to check SRS circuit.
1. Check operation of ªAIR BAGº and ªSEAT BELTº warning
lamps (ªSEAT BELTº warning lamp can be used for check-
ing seat belt pre-tensioner on models except for Europe.).
After turning ignition key to ªONº position, both warning
lamps illuminate. The ªAIR BAGº warning lamp will go off
after about 7 seconds if no malfunction is detected. The
ªSEAT BELTº warning lamp will also go off after about 7
seconds after seat belt has been fastened and no malfunc-
tion is detected. (When seat belt has not been fastened, the
warning lamp continues to illuminate until seat belt is fas-
tened.)
If any of the following warning lamp conditions occur, imme-
diately check the air bag or seat belt pre-tensioner system.
Refer to RS-1032 for details.
+The ªAIR BAGº or ªSEAT BELTº warning lamp does not illu-
minate when the ignition switch is turned ªONº.
+The ªAIR BAGº or ªSEAT BELTº (with seat belt fastened)
warning lamp does not go off about 7 seconds after the igni-
tion switch is turned ªONº.
+The ªAIR BAGº or ªSEAT BELTº (with seat belt fastened)
warning lamp blinks after about 7 seconds after the ignition
switch is turned ªONº.
2. Visually check SRS components
(1) Diagnosis sensor unit
+Check diagnosis sensor unit and bracket for dents, cracks or
deformities.
+Check connectors for damage, and terminals for deformities.
(2) Air bag module and steering wheel
+Remove 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.
+Install driver air bag module to steering wheel to check fit or
alignment with the wheel.
+Check steering wheel for excessive free play.
+Install passenger air bag module to instrument panel to
check fit or alignment with the instrument panel.
+Install side air bag module to seat back to check fit and
alignment with the seat.
(3) Spiral cable
+Check spiral cable for dents, cracks, or deformities.
+Check connectors and protective tape for damage.
+Check steering wheel for noise, binding or heavy operation.
(4) Main harness and body harness
+Check connectors for poor connections, damage, and termi-
nals for deformities.
+Check harnesses for binding, chafing or cut.
(5) Seat belt pre-tensioner
+Check harness cover and connectors for damage, terminals
for deformities, and harness for binding.
+Check belts for damage and anchors for loose mounting.
+Check retractor for smooth operation.
SRS222-B
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-1006

+Perform self-diagnosis for seat belt pre-tensioner using seat
belt warning lamp or CONSULT-II. Refer to ªSelf-diagnosisº
for details.
(6) Satellite sensor
+Check satellite sensor (including bracket portion) for dents,
cracks or deformities.
+Check connectors for damage, and terminals for deformities.
CAUTION:
Replace previously used special bolts, ground bolt and nuts
coated with bonding agent.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items (Cont'd)
RS-1007

Removal and Installation Ð Diagnosis
Sensor Unit, Seat Belt Pre-tensioner with
Load Limiter and Satellite Sensor
CAUTION:
+Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.
+Do not use old bolts and nuts coated with bonding agent after removal; replace with new ones.
+Check diagnosis sensor unit, seat belt pre-tensioner with load limiter and satellite sensor for
proper installation.
+Check diagnosis sensor unit and satellite sensor to ensure they are free of deformities, dents,
cracks or rust. If they show any visible signs of damage, replace them with new ones.
+Check diagnosis sensor unit brackets to ensure they are free of deformities and rust.
+After replacement of diagnosis sensor unit, seat belt pre-tensioner and satellite sensor, check
SRS function and perform self-diagnosis for SRS. Refer to ªSelf-diagnosisº for details. (RS-1032)
+Do not attempt to disassemble diagnosis sensor unit, seat belt pre-tensioner with load limiter and
satellite sensor.
+Replace diagnosis sensor unit, seat belt pre-tensioner and satellite sensor if it has been dropped
or sustained an impact.
+Do not expose seat belt pre-tensioner to temperatures exceeding 80ÉC (176ÉF).
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver, passenger and side air bag module con-
nectors. Also, disconnect seat belt pre-tensioner connector.
2. Remove console finisher, console box assembly and instru-
ment panel stay cover. Refer to ªINSTRUMENT PANELº in
BT section.
3. Disconnect diagnosis sensor unit connector.
4. 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:
+To install, reverse the removal procedure sequence.
+After replacement, perform self-diagnosis for SRS. Refer
to ªSelf-diagnosisº for details (RS-1032).
CAUTION:
+Do not use old special bolts coated with bonding agent;
replace with new coated special bolts.
SRS757
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-1008