Lexus SC300 / Lexus SC400. Manual - part 786

4. PLACE 

TIRES

(a)  Place at least 2 tires under the tire to which the front

passenger airbag assembly is tied.

(b) Place 

at 

least 2 tires over the tire to which the front passenger

airbag assembly is tied. The top tire should have the wheel
installed.

(c)  Tie the tires together by 2 wire harnesses.

CAUTION: Make sure that the wire harnesses are tight. It
is very dangerous if looseness in the tires coming free
through the shock of the airbag deploying.
HINT: Place the SST connect and wire harness inside tires.
Provide at least 1 m (3 ft) of slack for the wire harness.

5. INSTALL 

SST

Connect 

the SST connector to the front passenger airbag as-

sembly connector.
SST 09082–00700
NOTICE: To avoid damaging the SST connector and wire
harness, do not lock the secondary lock of the twin lock.

6. AIRBAG 

DEPLOYMENT

(a)  Connect the SST red clip to the battery positive (+) terminal

and the black clip to the battery negative (–) terminal.

(b)  Confirm that no–one is within 10 m (33 ft) of the tire the front

passenger airbag assembly is tied to.

(c)  Press the SST activation switch and deploy the airbag.

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY

RS–39

7. DISPOSAL OF FRONT PASSENGER AIRBAG

ASSEMBLY
CAUTION:

•

The front passenger airbag assembly is very hot when

the airbag is deployed, so leave it alone for at least 30

minutes after deployment.

•

Use gloves and safety glasses when handling a front

passenger airbag assembly with deployed airbag.

•

Do not apply water, etc., to a front passenger airbag

assembly with deployed airbag.

•

Always wash your hand with water after completing the

operation.

(a)  Remove the front passenger airbag assembly from the tire.
(b)  Place the front passenger airbag assembly in a vinyl bag, tie

the end tightly and dispose of it the same way as other
general parts.

RS–40

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY

FRONT AIRBAG SENSOR

INSPECTION ITEMS

RS015–0C

1. 

VEHICLES NOT INVOLVED IN A COLLISION
Perform a diagnostic system check.
(See page 

RS–59

)

2. 

VEHICLES INVOLVED IN A COLLISION

(a)  Perform a diagnostic system check.

(See page 

RS–59

)

(b)  If the front fender of the car or its periphery is damaged,

perform visual check for damage to the front airbag sensor,
which includes the following items even if the airbag was not
deployed:

•

Bracket deformation.

•

Peeling of paint from the bracket.

•

Cracks, dents or chips in the case.

•

Cracks and dents in, or chipping and scratches of the
connector.

•

Peeling off of the label or damage to the series number.

Also refer to the body dimension drawings in the BODY sec-
tion and check the dimensions and mounting surface angle
of the body area where the front airbag sensors are mounted.
(The SRS may malfunction, or may not work, if the mounting
angle or dimensions of the sensor mount are not correct.)

REPLACEMENT REQUIREMENTS

RS016–06

In the following cases, replace the front airbag sensor.
NOTICE: for replacement of the front airbag sensor, see
page 

RS–42

, “FRONT AIRBAG SENSOR REMOVAL AND

INSTALLATION” and be sure to follow the correct proce-
dure.

•

If the SRS has been deployed in a collision.

(Replace both the left and right airbag sensors.)

•

If the front airbag sensor has been found to be faulty in
troubleshooting.

•

If the front airbag sensor has been found to be faulty
during the check in item 2–(b).

•

If the front airbag sensor has been dropped.

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT AIRBAG SENSOR

RS–41

COMPONENTS

RS045–01

FRONT AIRBAG SENSOR
REMOVAL AND INSTALLATION

RS046–01

NOTICE:

•

If the wiring connector of the supplemental restraint

system is disconnected with the ignition switch at ON or

ACC, diagnostic trouble codes will be recorded.

•

Never use SRS parts from another vehicle. When

replacing parts, replace with new parts.

•

Never reuse the sensor involved in a collision when the

SRS has deployed.

•

Never repair a sensor in order to reuse it.

RS–42

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT AIRBAG SENSOR