Lexus SC300 / Lexus SC400. Service manual — part 785

When scrapping vehicle

HINT: Have a battery ready as the power source to deploy the
airbag.

1.

DISCONNECT NEGATIVE (–) TERMINAL CABLE FROM
THE BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the LOCK posi-
tion and the negative (–) terminal cable is disconnected
from the battery (See page

RS–2

).

2.

DISCONNECT AIRBAG CONNECTOR

(a) Remove the glove compartment door finish plate inside the

glove compartment.
NOTICE: When handling the airbag connector, take care
not to the airbag wire harness.

(b) Pull up the connector.
(c) Disconnect the airbag connector.

3.

CONFIRM FUNCTIONING OF SST
(See page

RS–27

)

SST 09082–00700

4. INSTALL

SST

(a) Connect the SST connector to the front passenger airbag

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

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY

RS–35

(b) Move the SST to at least 10 m (33 ft) from the front of the

vehicle.

(c) Close all the doors and windows of the vehicle.

NOTICE: Take care not change the SST wire harness.

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

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

5. DEPLOY

AIRBAG

(a) Confirm that no–one is inside the vehicle or within 10 m (33

ft) of the vehicle.

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

HINT: The airbag deploys simultaneously as the LED of the
SST activation switch lights up.

6. DISPOSAL OF FRONT PASSENGER AIRBAG

ASSEMBLY
NOTICE:

•

The front passenger airbag assembly is very out not

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 hands with water after completing the

operation.

When scrapping a vehicle, deploy the airbag and scrap the
vehicle with the front passenger airbag assembly still
installed.

RS–36

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY

When disposing of front passenger
airbag assembly only

When disposing of the front passenger airbag assembly
only, never use the customer’s vehicle to deploy the air-
bag.
Remove the front passenger airbag assembly from the ve-
hicle and be sure to follow the procedure given below when
deploying the airbag.

HINT: Have a battery ready as the power source to deploy the
airbag.

1.

REMOVE FRONT PASSENGER AIRBAG ASSEMBLY
CAUTION:

•

When removing the front passenger airbag assembly,

work must be started after 90 seconds from the time the

ignition switch is turned to the LOCK position and the

negative (–) terminal cable is disconnected from the

battery.

•

Store the front passenger airbag assembly with the

airbag door facing up.

2.

FIX FRONT PASSENGER AIRBAG ASSEMBLY TO TIRE
Using a service–purpose wire harness for vehicle, tie down
the front passenger airbag assembly to the tire.

Wire harness: Stripped wire harness section

1.25 mm

2

or more (0.0019 in

2

or more).

HINT: To calculate the square of the stripped wire harness
section–

Square = 3.14 x (Diameter)

2

divided by 4

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY

RS–37

CAUTION: If a wire harness which is too thin or some oth-
er thing is used to tie down the front passenger airbag as-
sembly, it may be snapped by the shock when the airbag
is deployed, this is highly dangerous.
Always use a wire harness for vehicle use which is at
least 1.25 mm

2

(0.0019 in)

2

.

(1) Wrap the wire harness around the tire, passing the wire

harness at least 3 times through the installation hole on
the left and right sides of the front passenger airbag as-
sembly.

(2) Position the front passenger airbag assembly inside the

tire with the airbag door facing inside.

Tie the wire harness to the tire.

Tire size: Must exceed the following dimensions

Width 185 mm (7.28 in.)

Inner diam 360 mm (14.17 in.)

CAUTION:

•

Make sure the wire harness is tight. It is very dangerous

if a loose wire harness results in the front passenger

airbag assembly coming free due to the shock of the

airbag deploying.

•

Always tie down the front passenger airbag assembly

with the airbag door facing inside.

NOTICE: The tire will be marked by the airbag deploy-
ment, so use a redundant tire.

3.

CONFIRM FUNCTIONING OF SST
(See page

RS–27

)

SST 09082–00700

RS–38

–

SUPPLEMENTAL RESTRAINT SYSTEM

FRONT PASSENGER AIRBAG ASSEMBLY