1991 LEXUS SC400 airbag

FRONT PASSENGER AIRBAG
ASSEMBLY
INSPECTION ITEMS
RS042±01
1. VEHICLES NOT INVOLVED IN A COLLISION
(a) Perform a diagnostic system check.(See page RS±59)
(b) Perform a visual check which includes the following items
with the front passenger airbag assembly installed in the
vehicle.
wCheck for cuts, minute cracks or marked discoloration
of the front passenger airbag door.
2. VEHICLE 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 airbag assembly removed from the vehicle.
wCheck for cuts, cracks in, or marked discoloration of the
front passenger airbag door.
w Check for cuts, cracks in, or chipping of connectors and
wire harness.
w Check for deformation of the instrument panel and
instrument panel reinforcement.
HINT:
w If the instrument panel and instrument panel
reinforcement is deformed, never repair it. Always
replace it with a new one.
w There should be no interference between the
instrument panel and front passenger airbag door. The
clearance should be uniform all the way around when
the new airbag assembly is installed on the instrument
panel.
CAUTION: For replacement of the airbag assembly, see
page RS±30 , ªFRONT PASSENGER AIRBAG ASSEMBLY
REMOVAL AND INSTALLATIONº and be sure to follow
the correct procedure.
RS±28
±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLY
WhereEverybodyKnowsYourName

IF THE AIRBAG IS DEPLOYED
(a) Perform a diagnostic system check. (See page RS±59)
(b) Perform a visusal check which includes the following items
with the airbag assembly removed from vehicle.
wCheck for deformation of the instrument panel and
instrument panel reinforcement.
w Check for damage to the connector and wire harness.
HINT:
w If the instrument panel and instrument panel
reinforcement is deformed, never repair it. Always
replace it with a new one.
w There should be no interference between the
instrument panel and front passenger airbag door. The
clearance should be uniform all the way around when
the new airbag assembly is installed on the instrument
panel.
REPLACEMENT REQUIREMENTS
RS01M±06
In the following case, replace the front passenger airbag as-
sembly, instrument panel, instrument panel reinforcement.
CAUTION: For replacement of the front passenger airbag
assembly, see page RS±30, ªFRONT PASSENGER AIR-
BAG ASSEMBLY REMOVE AND INSTALLATIONº and be
sure to follow the correct procedure.
w If the airbag has been deployed.
w If the front passenger airbag assembly has been found
to be faulty in troubleshooting.
w If the front passenger airbag assembly or instrument
panel reinforcement has been found to be faulty during
the check in item 1±(b) or 2±(b).
w If the front passenger airbag assembly has been
dropped.
±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLYRS±29
WhereEverybodyKnowsYourName

COMPONENTS
RS043±01
FRONT PASSENGER AIRBAG
ASSEMBLY REMOVAL AND
INSTALLATION
RS044±01
NOTICE:
wIf the wiring connector of the supplemental restraint
system is disconnected with the ignition switch at ON or
ACC, diagnostic trouble codes will be recorded.
w Never use airbag parts from another vehicle. When
replacing parts, replace with new parts.
RS±30±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLY
WhereEverybodyKnowsYourName

1. DISCONNECT NEGATIVE (±) TERMINAL CABLE FROMBATTERY
CAUTION: Work must be started after 90 second from the
time the ignition switch is turned to the LOCK position
and the negative (±) terminal cable is disconnected from
the battery (See page RS±2).
2. REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER
(a) Using a clip remover, remove 2 clips.
(b) Remove the under cover.
3. DISCONNECT AIRBAG CONNECTER
(a) Remove the glove compartment door finish plate inside the glove compartment.
NOTICE: When handling the airbag connector, take care
not to damage the airbag wire harness.
(b) Pull up the connector.
(c) Disconnect the airbag connector.
4. REMOVE GLOVE COMPARTMENT ASSEMBLY
(a) Remove the 2 console box hole covers.
(b) Remove the 4 screws and clip.
(c) Remove the glove compartment assembly.
±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLYRS±31
WhereEverybodyKnowsYourName

5. REMOVE GLOVE COMPARTMENT DOOR LOCKMOUNTING BRACKET
Remove the 2 screws, disconnect the door lock mounting
bracket.
(a) Remove the 3 screws, 2 nuts and bolt.
6. REMOVE FRONT PASSENGER AIRBAG ASSEMBLY
(b) Pull out the front pass enger airbag assembly from the
instrument panel.
NOTICE: When removing the front passenger airbag as-
sembly, take care not to pull the airbag wire harness.
CAUTION:
w When storing the front passenger airbag assembly, keep
the upper surface of the front passenger airbag assembly
facing upward.
w Never disassemble the front passenger airbag assembly.
7. INSTALL FRONT PASSENGER AIRBAG ASSEMBLY
(a) Install and torque the 2 nuts and the bolt.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
(b) Install the 3 screws.
NOTICE:
w Make sure the front passenger airbag assembly is
installed to the specified torque.
w If the front passenger airbag assembly has been
dropped, or there are cracks, dents or other defects in the
case or connector, replace the front passenger airbag
assembly with a new one.
w When installing the front passenger airbag assembly,
take care that the wiring do not interfere with other parts
and are not pinched between other parts.
RS±32±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLY
WhereEverybodyKnowsYourName

8. INSTALL FOLLOWING PARTS:
(a) Glove compartment door lock mounting bracket
(b) Glove compartment assemblyNOTICE: When installing the glove compartment assem-
bly, carefully pull out the airbag wire harness from the
glove compartment upper hole.
(c) Airbag connector
(d) Glove compartment door finish plate
(e) No.2 instrument panel under cover
9. CONNECT NEGATIVE (±) TERMINAL CABLE TO BATTERY
±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLYRS±33
WhereEverybodyKnowsYourName

FRONT PASSENGER AIRBAG
ASSEMBLY DISPOSAL
RS01P±02
When scrapping vehicles equipped with an supplemental re-
straint system or disposing of a front passenger airbag as-
sembly, always first deploy the airbag in accordance with the
procedure described below.
If any abnormality occurs with the airbag deployment, con-
tact the SERVICE DEPT. of TOYOTA MOTOR SALES,
U.S.A., INC..
Never dispose of a front passenger airbag assembly
which has an undeployed airbag.
When disposing of a front passenger airbag assembly with
an airbag deployed in a collision, follow the same procedure
given under ªWhen scrapping vehicle, step 5. DISPOSAL OF
FRONT PASSENGER AIRBAG ASSEMBLYº (See page
RS±36 ).
PRECAUTIONS FOR AIRBAG DEPLOYMENT
w The airbag produces a sizeable exploding sound when
it deploys, so perform the operation out±of±doors and
where it will not create a nuisance to nearby residents.
w When deploying the airbag, always use the specified
SST: SRS AIRBAG DEPLOYMENT TOOL (SST
09082±00700). Perform the operation in a place away
from electrical noise.
w When deploying an airbag, perform the operation from
at least 10 m (33 ft) away from the front passenger
airbag assembly.
w The front passenger airbag assembly is very hot when
the airbag is deployed, so leave it alone for at least 30
minutes after deployment.
w Use gloves and safety glasses when handling a front
passenger airbag assembly with deployed airbag.
w Always wash your hands with water after completing the
operation.
w Do not apply water, etc., to a front passenger airbag
assembly deployed airbag.
RS±34
±
SUPPLEMENTAL RESTRAINT SYSTEM FRONT PASSENGER AIRBAG ASSEMBLY
WhereEverybodyKnowsYourName

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 ASSEMBLYRS±35
WhereEverybodyKnowsYourName