Lexus SC300 / Lexus SC400. Manual - part 126

2.  When the components of the second system which

need to be removed are few in number and can be
removed as a unit:

An abbreviated diagram of the parts and the name of the se-
cond system are included inside the larger component dia-
gram.
HINT: 

For  more detail than is given in the abbreviated dia-

gram, refer to the component diagram on the page number
referred to by the ”See page” next to the diagram title.
Example:

–

BODY

General Information

BO–7

SRS

 AIRBAG

(See page 

AB–2

)

The LEXUS SC300 is equipped with an SRS (Supplemental Restraint System) airbag.
Failure to carry out service operations in the correct sequence could cause the airbag system to deploy,
possibly leading to a serious accident.
When removal or installation of airbag parts and the yellow wire harness and connector for the airbag is
necessary, refer to the precautionary notices in the AB section before performing the operation.

Work must be started after 20 seconds or longer from the time the ignition switch is set to the LOCK
position and the negative (–) terminal cable is disconnected from the battery.
(The airbag system is equipped with a back–up power source so that if work is started within 20 se-
conds of disconnecting the negative (–) terminal cable of the battery, the airbag may be deployed.

To avoid erasing the memory of each memory system, never use a back–up power supply from
outside the vehicle.

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

The front airbag sensor set bolt has been anti–rust treated. When the sensor is removed, always
replace the set bolt with a new one.

If the front airbag sensors, center airbag sensor or steering wheel pad have been dropped, or if there
are cracks, dents or other defects in the case, bracket or connector, replace them with new ones.

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

Do not expose the front airbag sensors, center airbag sensor or steering wheel pad directly to hot air
or flames.

The airbag system’s wire harness is integrated with the cowl wire harness assembly. The wires for the
airbag wire harness are encased in a yellow corrugated tube. All the connectors for the system are
also a standard yellow color. If the airbag system wire harness becomes disconnected or the
connector becomes broken due to an accident, etc., repair or replace it as shown on page 

AB–20

.

The steering wheel must be fitted correctly to the steering column with the spiral cable at the neutral
position; otherwise, cable disconnection and other troubles may result. Refer to page 

AB–14

 of this

manual concerning correct steering wheel installation.

When removing the steering wheel pad or handling a new steering wheel pad, it should be placed with
the pad top surface facing up. In this case, the twin–lock type connector lock lever should be in the
locked state and care should be taken to place it so the connector will not be damaged. (Storing the
pad with its metallic surface up may lead to a serious accident if the airbag inflates for some reason.)

Grease should not be applied to the steering wheel pad and the pad should not be cleaned with
detergents of any kind.

Store the steering wheel pad where the ambient temperature remains below 93



C (200



F), without

high humidity and away from electrical noise.

Information labels are attached to the periphery of the airbag components. Follow the notices.

When the ignition switch is at ACC or ON and the airbag warning light remains on, the center airbag
sensor assembly has detected a malfunction code. (See page 

AB–30

).

BO–8

–

BODY

General Information

PREPARATION

EQUIPMENT

Part Name

Note

Clip remover

–

Torque wrench

–

Hexagon wrench

–

Torx driver

–

Hog ring pliers

–

Tape

For applying to the tip of the tools to avoid scratching parts or
painted surfaces of the body

Double–stick tape

–

Adhesive tape

For applying to the body surfaces around the parts to avoid
scratching painted surface

Instant adhesive

–

Adhesive

–

Cleaner

–

Knife

–

Shop rag

–

Sealer gun

–

Brush

–

Putty spatula

–

Glass plate or like object

For mixing the adhesive on

Wooden block or like object

For tying both piano wire ends

Plastic sheet

For placing between the piano wire and the safety pad to avoid
scratching the safety pad

LUBRICANT

Item

Capacity

Classification

Item

Liters

US qts

lmp. qts

Classification

MP grease

–

–

–

–

–

BODY

Preparation

BO–9

SSM (SPECIAL SERVICE MATERIALS)

Part Name

Part No.

Use etc.

Windshield glass adhesive set No. 15

08850–00070

Contents of set:

Main agent 500 g (17.64 oz.)
Hardening agent 75 g (2.65 oz.)

Windshield glass adhesive set No. 35

08850–00080

Hardening agent 75 g (2.65 oz.)
Primer G [for glass] 20 g (0.71 oz.)
Primer M [for body] 20 g (0.71 oz.)
Sponge for applying primer

Windshield glass adhesive set No. 45

08850–00090

S onge for a

lying  rimer

Piano wire 0.6 mm dia. X 1 m

(0.024 in. dia. X 39.37 in.)

Cartridge

Auto glass sealer

08833–00030

or equivalent

–

1. 

CHOOSE SUITABLE ADHESIVE SET
Use an adhesive set suitable for the ambient temperature.

2. 

CHECK ADHESIVE USABLE TIME
After mixing main and hardening agents, finish glass installa-
tion within the specified time as shown.
Example: For glass installation in an ambient temperature of
25

°

C (77

°

F), apply adhesive set No. 35 within 45 minutes.

3. 

CHECK ADHESIVE HARDENING TIME
After main and hardening agents are mixed, leak tests should
be made only after the hardening time has elapsed.
Example: The hardening time for adhesive set No. 35 with an
ambient temperature of 25

°

C (77

°

F) is 2 1/2 hours.

NOTICE:  Do not drive the vehicle until at least double
the hardening time has elapsed.

BO–10

–

BODY

Preparation