TOYOTA LAND CRUISER 1998 Factory Repair Manual

C51019H20054
Stopper
Locking PartSpring
Slider
Locking Arm
Rebounded by Slider
(Spring)Stopper
H20055
Z14034
Fig.1
Fig.2Power Source
Safing
Sensor
Squibs
Deceleration Sensor
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-1 1
2286 Author
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2004 LAND CRUISER (RM1071U)
(4) Half connection prevention mechanism:
If the connector is not completely connected, the
connector is disconnected due to the spring opera-
tion to the extent that no continuity exists.
(5) Connector lock mechanism:
Locking the connector lock button securely con-
nects the connector.
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the deceleration sen-
sor go on simultaneously. When a deceleration force acts
on the sensors, 2 squibs in the driver airbag and front pas-
senger airbag ignite and generate gas. The gas discharg-
ing into the driver airbag and front passenger airbag rap-
idly increases the pressure inside the bags, breaking
open the steering wheel pad and instrument panel.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag's rear or
side.

H02763
Outer
H02764
Lock of connector is released
Disconnection is completed
H02768
Outer
Outer
Connection is completed RS-12
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2287 Author
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2004 LAND CRUISER (RM1071U)
14. DISCONNECTION OF CONNECTORS FOR FRONT
AIRBAG SENSOR, SIDE AND CURTAIN SHIELD AIR-
BAG SENSOR AND CURTAIN SHIELD AIRBAG SEN-
SOR
(a) While holding both flank sides of the outer, slide the outer
in the direction shown by an arrow.
(b) Lock of the connectors is released, and then disconnect
the connectors.
HINT:
Be sure to hold both flank sides of the outer. If holding the top
and bottom sides, it will obstruct disconnection.
15. CONNECTION OF CONNECTORS FOR FRONT AIR-
BAG SENSOR, SIDE AND CURTAIN SHIELD AIRBAG
SENSOR AND CURTAIN SHIELD AIRBAG SENSOR
(a) Align the male connector (of the side of sensor) and fe-
male connector in the same direction as shown in the il-
lustration and fit them in without rubbing.
(b) As they are fitted in, the outer slides rearward. Press it un-
til the outer returns to its original position again.
If fitting stops half way, connectors will separate.
(c) Be sure to insert until they are locked. After fitting in, pull
them slightly to check that they are locked. (When locked,
make sure that the outer returns to its original position and
sound to be fit in can be heard.)

H01584
Slider
Disconnection is completed Slider
H01585
SliderSlider
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-13
2288 Author
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2004 LAND CRUISER (RM1071U)
HINT:
Do not fit in while holding the outer.
When fitting in, the outer slides. Do not touch it.
16. DISCONNECTION OF SIDE AIRBAG CONNECTOR
(a) Place a finger on the slider.
(b) Slide the slider to release lock.
(c) Disconnect the connector.
17. CONNECTION OF SIDE AIRBAG CONNECTOR
(a) Align a lock part of male connector and a slider of female
connector in the same direction as shown in the illustra-
tion, fit them in without rubbing.
(b) Be sure to insert until they are locked. After fitting in pull
them slightly to check that they are locked. (When locked,
make sure that the outer returns to its original position and
sound to be fit in can be heard.)
HINT:
As the slider slides, do not touch it.
Be careful not to deform the release board. If the release
board is deformed, replace it with a new one.

H01586
Slider
Disconnection is completed Slider
RS-14
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2289 Author
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2004 LAND CRUISER (RM1071U)
18. DISCONNECTION OF CONNECTORS FOR CURTAIN
SHIELD AIRBAG ASSEMBLY AND FRONT PAS-
SENGER AIRBAG ASSEMBLY
(a) Place a finger on the slider.
(b) Slide the slider to release lock.
(c) Disconnect the connector.

H01587
Slider
Slider
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-15
2290 Author
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2004 LAND CRUISER (RM1071U)
19. CONNECTION OF CONNECTORS FOR CURTAIN
SHIELD AIRBAG ASSEMBLY AND FRONT PAS-
SENGER AIRBAG ASSEMBLY
(a) Align a lock part of male connector and a slider of female
connector in the same direction as shown in the illustra-
tion, fit them in without rubbing.
(b) Be sure to insert until they are locked. After fitting in pull
them slightly to check that they are locked. (When locked,
make sure that the outer returns to its original position and
sound to be fit in can be heard.)
HINT:
As the slider slides, do not touch it.
Be careful not to deform the release board. If the release
board is deformed, replace it with a new one.

RS0B6-06
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-1
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2004 LAND CRUISER (RM1071U)
SRS AIRBAG
PRECAUTION
CAUTION:

The LAND CRUISER is equipped with SRS, which comprises a driver airbag, front passenger
airbag, side airbag and curtain shield airbag. Failure to carry out service operations in the cor-
rect sequence could cause the SRS to unexpectedly deploy during servicing, possibly leading
to a serious accident. Further, if a mistake is made in servicing the SRS, it is possible that the
SRS may fail to operate when required. Before performing servicing (including removal or
installation of parts, inspection or replacement), be sure to read the following items carefully,
then follow the correct procedures described in the repair manual.

Work must be started 90 seconds after the ignition switch is turned to the ºLOCKº position and
the negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds
from disconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
curtain shield airbag assembly, airbag sensor assembly, front airbag sensor, side and curtain
shield airbag sensor assembly, curtain shield airbag sensor assembly or seat position sensor
assembly directly to hot air or flames.
NOTICE:

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

Even in the case of a minor collision where the SRS does not deploy, the steering wheel pad,
front passenger airbag assembly, side airbag assembly, curtain shield airbag assembly, airbag
sensor assembly, front airbag sensor, side and curtain shield airbag sensor assembly, curtain
shield airbag sensor assembly and seat position sensor assembly should be inspected (See
page RS-18, RS-32, RS-47, RS-60, RS-71, RS-76, RS-81, RS-87 and RS-92).

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, curtain shield airbag assembly, airbag sensor assembly, front airbag sensor,
side and curtain shield airbag sensor assembly, curtain shield airbag sensor assembly or seat
position sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain
shield airbag assembly, airbag sensor assembly, front airbag sensor, side and curtain shield
airbag sensor assembly, curtain shield airbag sensor assembly or seat position sensor assem-
bly has been dropped, or if there are cracks, dents or other defects in the case, bracket or con-
nector, replace it with new one.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notice.

After work on the SRS is completed, perform the SRS warning light check (See page DI-692).

RS-2
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
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When the negative (-) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back- up power supply from outside the vehicle.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.

RS0B8-10
H20921
Column Upper Cover Spiral Cable
Steering Wheel
Lower No. 3 Cover
Column Lower Cover
Steering Wheel Pad
: Specified torqueSteering Wheel Lower No. 2 Cover
Torx Screw
Steering
WheelTorx Screw
Lower No. 1 Panel
Cowl Side Trim LH
Front Door Scuff Plate LH
Front Door Opening
Trim LH
Instrument Cluster Finish Panel
8.8 (90, 78 in.´lbf)8.8 (90, 78 in.´lbf)
50 (510, 37)
N´m (kgf´cm, ft´lbf) RS-16
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
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2004 LAND CRUISER (RM1071U)
STEERING WHEEL PAD AND SPIRAL CABLE
COMPONENTS

RS0VJ-01
AB0152
SST
AB0158
SSTBattery RS-20
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
2295 Author
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2004 LAND CRUISER (RM1071U)
DISPOSAL
HINT:
When scrapping vehicle equipped with an SRS or disposing of
a steering wheel pad (with airbag), always first deploy the air-
bag in accordance with the procedure described below. If any
abnormality occurs with the airbag deployment, contact the
SERVICE DEPT. of TOYOTA MOTOR SALES, U.S.A., INC.
CAUTION:

Never dispose of a steering wheel pad of which airbag
has not been deployed.

The airbag produces a sizeable exploding sound
when it deploys, so perform the operation out-of-
doors and where it will not create a nuisance to
nearby residents.

When deploying the airbag, always use the specified
SST (SRS Airbag Deployment Tool). Perform the op-
eration in a place away from electrical noise.
SST 09082-00700

When deploying an airbag, perform the operation at
least 10 m (33 ft) away from the steering wheel pad.

The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.

Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.

Always wash your hands with water after completing
the operation.

Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
1. AIRBAG DEPLOYMENT WHEN SCRAPPING VE-
HICLE
HINT:
Have a battery ready as the power source to deploy the airbag.

AB0152
SST
AB0158
SSTBattery
H01580
SST
H20952
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS-21
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2004 LAND CRUISER (RM1071U)
(a) Check the function of the SST.
CAUTION:
When deploying the airbag, always use the specified SST:
SRS Airbag Deployment Tool.
SST 09082-00700
(1) Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip to the battery neg-
ative (-) terminal.
HINT:
Do not connect the yellow connector of the SST which will be
connected with the supplemental restraint system.
(2) Press the SST activation switch, and check that the
LED of the SST activation switch comes on.
CAUTION:
If the LED lights up while the activation switch is not being
pressed, a malfunction on SST is probable, so never use
the SST.
(3) Disconnect the SST from the battery.
(b) Install the SST.
CAUTION:
Check that there is no looseness in the steering wheel and
steering wheel pad.
(1) Remove the front door scuff plate LH.
(2) Remove the cowl side trim LH.
(3) Remove the front door opening trim LH.
(4) Remove the lower No. 1 panel.
(5) While turning the steering wheel right or left, remove
the 3 screws and column lower cover.
(6) Disconnect the airbag connector of the spiral cable.