Lexus RX300 (MCU15). Service manual - part 75

W02655

Marks

–

INTRODUCTION

FOR ALL OF VEHICLES

IN–11

LEXUS RX300   (RM785E)

To avoid erasing the memory of each memory sys-
tem, never use a back–up power supply from anoth-
er battery.

(3)

Even in cases of a minor collision where the SRS
does not deploy, the steering wheel pad, front pas-
senger airbag assembly, side airbag assembly and
seat belt pretensioner should be inspected (See
page RS–14, RS–28, RS–41, and BO–190).

(4)

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

(5)

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

(6)

Never disassemble and repair the airbag sensor as-
sembly, steering wheel pad, front passenger airbag
assembly, side airbag assembly or seat belt preten-
sioner in order to reuse them.

(7)

If the airbag sensor assembly, steering wheel pad,
front passenger airbag assembly, side airbag as-
sembly or seat belt pretensioner have been
dropped, or if there are cracks, dents or other de-
fects in the case, bracket or connector, replace
them with new ones.

(8)

Do not directly expose the airbag sensor assembly,
steering wheel pad, front passenger airbag, assem-
bly, side airbag assembly or seat belt pretensioner
to hot air or flames.

(9)

Use a volt/ohmmeter with high impedance (10 kΩ/V
minimum) for troubleshooting of the electrical cir-
cuit.

(10) Information labels are attached to the periphery of

the SRS components. Follow the instructions on the
notices.

(11) After work on the supplemental restraint system is

completed, check the SRS warning light (See page
DI–305).

(c)

SPIRAL CABLE (in Combination Switch)
The steering wheel must be fitted correctly to the steering
column with the spiral cable at the neutral position, other-
wise cable disconnection and other troubles may result.
Refer to SR–18 of this manual concerning correct steer-
ing wheel installation.

B02398

Example:

Correct

Wrong

Z13950

Example:

IN–12

–

INTRODUCTION

FOR ALL OF VEHICLES

LEXUS RX300   (RM785E)

(d)

STEERING WHEEL PAD (with Airbag)
(1)

When removing the steering wheel pad or handling
a new steering wheel pad, it should be placed with
the pad top surface facing up.
Storing the pad with its metallic surface facing up-
ward may lead to a serious accident if the airbag in-
flates for some reason. In addition do not store a
steering wheel pad on top of another one.

(2)

Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)

(3)

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

(4)

Store the steering wheel pad where the ambient
temperature remains below 93°C (200°F), without
high humidity and away from electrical noise.

(5)

When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) under the
steering column near the combination switch con-
nector before starting work.

(6)

When disposing of a vehicle or the steering wheel
pad alone, the airbag should be deployed using an
SST before disposal (See page RS–16).
Carry out the operation in a safe place away from
electrical noise.

B04701

Example:

Correct

Wrong

Z13951

Example:

–

INTRODUCTION

FOR ALL OF VEHICLES

IN–13

LEXUS RX300   (RM785E)

(e)

FRONT PASSENGER AIRBAG ASSEMBLY
(1)

Always store a removed or new front passenger air-
bag assembly with the airbag deployment direction
facing up.
Storing the airbag assembly with the airbag deploy-
ment direction facing down could cause a serious
accident if the airbag inflates.

(2)

Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)

(3)

Grease should not be attached to the front passen-
ger airbag assembly and the airbag door should not
be cleaned with detergents of any kind.

(4)

Store the airbag assembly where the ambient tem-
perature remains below 93°C (200°F), without high
humidity and away from electrical noise.

(5)

When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) installed on
the assembly before starting work.

(6)

When disposing of a vehicle or the airbag assembly
alone, the airbag should be deployed using an SST
before disposal (See page RS–30).
Perform the operation in a safe place away from
electrical noise.

B04702

Example:

Correct

Wrong

B01546

Example:

IN–14

–

INTRODUCTION

FOR ALL OF VEHICLES

LEXUS RX300   (RM785E)

(f)

SIDE AIRBAG ASSEMBLY
(1)

Always store a removed or new side airbag assem-
bly with the airbag deployment direction facing up.
Storing the airbag assembly with the airbag deploy-
ment direction facing down could cause a serious
accident if the airbag inflates.

(2)

Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)

(3)

Grease should not be attached to the side airbag
assembly and the surface should not be cleaned
with detergents of any kind.

(4)

Store the airbag assembly where the ambient tem-
perature remains below 93°C (200°F), without high
humidity and away from electrical noise.

(5)

When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) under the
seat before starting work.

(6)

When disposing of a vehicle or the side airbag as-
sembly alone, the airbag should be deployed using
an SST before disposal (See page RS–42).
Perform the operation in a safe place away from
electrical noise.