1991 LEXUS SC400 Service Repair Manual

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Page 217 of 4087

LEXUS SC400 1991 Service Repair Manual
FRONT AIRBAG SENSOR
1. Never reuse the front airbag sensors involved in a collisionwhen the airbag has deployed. (Replace both the left and
right airbag sensors.)
2. Install the front airbag sensor

Page 218 of 4087

$LEXUS SC400 1991 Service Repair Manual 3. Grease should not be applied to the steering wheel pad and the pad should not b\ e cleaned with detergents of any kind. 4. Store the steering wheel pad where the ambient temperature remains below$

Page 219 of 4087

LEXUS SC400 1991 Service Repair Manual
OPERATION
FUNCTION OF COMPONENTS
1. FRONT AIRBAG SENSORA front airbag sensor is mounted inside each of the front
fenders. The sensor unit is a mechanical type. When the sen-
sor detects decelerati

Page 220 of 4087

$LEXUS SC400 1991 Service Repair Manual 6. AIRBAG CONNECTORSAll connectors in the airbag system are colored yellow to distinguish them \ from other connectors. Connec- tors having special functions and specifically designed for airbags are$

Page 221 of 4087

$LEXUS SC400 1991 Service Repair Manual HINT: The illustration shows connectors (3) and (4). Connector (1) has \ a short spring plate on the fe- male terminal side, but the operating principle is the same. (3) Electrical Connection Check M$

Page 222 of 4087

$LEXUS SC400 1991 Service Repair Manual (4) Connector Twin±Lock MechanismWith this mechanism connectors (male and female connectors) are locked by \ two locking devices to increase connection reliability. If the primary lock is incomplet$

Page 223 of 4087

$LEXUS SC400 1991 Service Repair Manual INSPECTION ITEMS AND REPLACEMENT REQUIREMENTS If a Vehicle is brought in for an airbag system inspection, or if a vehicle wh\ ich has been involved in a collision is inspected, perform the inspection$

INSPECTION ITEMS AND REPLACEMENT REQUIREMENTS
If a Vehicle is brought in for an airbag system inspection, or if a vehicle wh\
ich has been involved in a collision
is inspected, perform the inspection in accordance with the following proc\
edure. If any problems are discovered,
replace the affected part with a new one.
Steering Wheel Pad (with Airbag), Steering Wheel and Spiral
Cable
INSPECTION ITEMS
1. VEHICLES NOT INVOLVED IN A COLLISION(a) Perform a diagnostic system check (See page AB±30).
(b) Perform a visual check which includes the following items with the steering wheel pad (with airbag) installed in the vehicle.
w 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 AB±30).
(b) Perform a visual check which includes the following items with the steering wheel pad (with airbag) removed from the vehicle.
w Check for cuts or cracks in, or marked discoloration of the
steering wheel pad top surface and grooved portion.
w Check for cuts and cracks in, or chipping of connectors and
wire harnesses.
w Check for deformation of the horn button contact plate of
the steering wheel.
HINT: w 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.
w 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 AB±14, ªREMOVAL AND INSTALLATIONº and be
sure to follow the correct procedure.
IF THE AIRBAG IS DEPLOYED
(a) Perform a diagnostic system check (See page AB±30).
(b) Perform a visual check which includes the following items with the steering wheel pad (with airbag) removed from the vehicle.
w Check for deformation of the horn button contact plate of
the steering wheel.
w Check for damage to the spiral cable connector and wire
harness.
AB±9SRS AIRBAG ± Inspection Items and Replacement Requirements
WhereEverybodyKnowsYourName

Page 224 of 4087

$LEXUS SC400 1991 Service Repair Manual HINT: w If the horn button contact plate of the steering wheel is deformed, never \ repair it. Always replace the steering wheel assembly with a new one. w There should be no interference between the$

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