Lexus SC300 / Lexus SC400. Manual — part 780

PREPARATION

SST (SPECIAL SERVICE TOOLS)

RS00X–04

RECOMMENDED TOOLS

RSOOY–04

EQUIPMENT

RS00Z–04

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Torque wrench

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Bolt Length: 35 mm (1.38 in.) Pitch: 1.0 mm (0.039 in.)
Diam.: 6.0 mm (0.236 in.)

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Airbag disposal

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Tire Width: 185 mm (7.28 in.) Inner diam.: 360mm (14.17 in.)

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Airbag disposal

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Tire with disk wheel Width: 185 mm (7028 in.)
Inner diam.: 360 mm (14.17 in.)

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Airbag disposal

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Vinyl bag

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Airbag disposal

–

SUPPLEMENTAL RESTRAINT SYSTEM

PREPARATION

RS–15

STEERING WHEEL PAD AND
SPIRAL CABLE

INSPECTION ITEMS

RS04B–01

1.

VEHICLES NOT INVOLVED IN A COLLISION

(a) Perform diagnostic system check. (See page

RS–59

)

(b) Perform a visual check which includes the following items

with the steering wheel pad (with airbag installed in the
vehicle.

•

Check for cuts, minute cracks or marked discoloration
of the steering wheel pad top surface and grooved
portion.

2.

VEHICLES INVOLVED IN A COLLISION
IF THE AIRBAG IS NOT DEPLOYED

(a) Perform a diagnostic system check. (See page

RS–59

)

(b) Perform a visual check which includes the following items

with the steering wheel pad (with airbag) removed from the
vehicle.

•

Check for cuts or cracks in, or marked discoloration of
the steering wheel pad top surface and grooved portion.

•

Check for cuts and cracks in, or chipping of connectors
and wire harness.

•

Check for deformation of the horn button contact plate
of the steering wheel.

HINT:

•

If the horn button contact plate of the steering wheel is
deformed, never repair it. Always replace the steering
wheel assembly with a new one.

•

There should be no interference between the steering
wheel pad and the steering wheel, and the clearance
should be uniform all the way around when the new
steering wheel pad is installed on the steering wheel.

CAUTION: For removal and installation of the steering
wheel pad, see page

RS–18

, “STEERING WHEEL PAD

AND SPIRAL CABLE REMOVAL AND INSTALLATION”
and be sure to follow the correct procedure.

RS–16

–

SUPPLEMENTAL RESTRAINT SYSTEM

STEERING WHEEL PAD AND SPIRAL CABLE

IF THE AIRBAG IS DEPLOYED

(a) Perform a diagnostic system check. (See page

RS–59

)

(b) Perform a visual check which includes the following items

with the steering wheel pad (with airbag) removed from he
vehicle.

•

Check for deformation of the horn button contact plate
of the steering wheel.

•

Check for damage to the spiral cable connector and wire
harness.

HINT:

•

If the horn button contact plate of the steering wheel is
deformed, never repair it. Always replace the steering
wheel assembly with a new one.

•

There should be no interference between the steering
wheel pad and the steering wheel, and the clearance
should be uniform all the way around when the new
steering pad is installed on the steering wheel.

REPLACEMENT REQUIREMENTS

RS011–02

In the following cases, replace the steering wheel pad, steer-
ing wheel or spiral cable.
CAUTION: For replacement of the steering wheel pad,
see page

RS–18

, “STEERING WHEEL PAD AND SPIRAL

CABLE REMOVAL AND INSTALLATION” and be sure to
follow the correct procedure.

•

If the airbag has been deployed.

•

If the steering wheel pad or spiral cable has been found
to be faulty in troubleshooting.

•

If the steering wheel pad, steering wheel or spiral cable
has been found to be faulty during the check in item
1–(b) or 2–(b).

•

If the steering wheel pad has been dropped.

–

SUPPLEMENTAL RESTRAINT SYSTEM

STEERING WHEEL PAD AND SPIRAL CABLE

RS–17

COMPONENTS

RS04D–01

STEERING WHEEL PAD AND SPIRAL
CABLE REMOVAL AND INSTALLATION

RS04D–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.

1.

DISCONNECT NEGATIVE (–) TERMINAL CABLE FROM
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

).

RS–18

–

SUPPLEMENTAL RESTRAINT SYSTEM

STEERING WHEEL PAD AND SPIRAL CABLE