TOYOTA SUPRA 1997 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 1997, Model line: SUPRA, Model: TOYOTA SUPRA 1997Pages: 1807, PDF Size: 39.36 MB
Page 1431 of 1807
Z05953
Spacer
Housing
Female Male
R10587
When Connector is Connected When Connector is Disconnected
Short Spring Plate
Housing
Housing
Terminal
ConnectorsShort Spring PlateSquib
Closed CircuitSquib Short Spring Plate ONContacting Male Terminal Short Spring Plate
RS-4
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
1943 Author: Date:
1997 SUPRA (RM502U)
(a) All connectors in the SRS are colored in yellow to distin-
guish them from other connectors. Connectors having
special functions and specifically designed for the SRS
are used in the locations shown above to ensure high reli-
ability. These connectors use durable gold-plated termi-
nals.
(1) Terminal Twin-Lock Mechanism
Each connector has a two-piece component con-
sisting of a housing and a spacer. This design en-
ables the terminal to be locked securely by two lock-
ing devices (the retainer and the lance) to prevent
terminals from coming out.
(2) Airbag Activation Prevention Mechanism
Each connector contains a short spring plate. When
the connector is disconnected, the short spring
plate automatically connects the power source and
grounding terminals of the squib.
Page 1432 of 1807
R12076Airbag Sensor AssemblyDisconnection
Detection
PinSRS
Warning
Light
W02758
Half Connection Complete Connection
Terminal for
Diagnosis
Disconnection Detection PinTerminal for
Diagnosis
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-5
1944 Author: Date:
1997 SUPRA (RM502U)
HINT:
The type of connector shown on the previous page is used for
connectors º2º, º3º and º4º in the diagram on the previous page.
Terminal side, but the operating principle is the same.
(3) Electrical Connection Check Mechanism
This mechanism electrically checks that connectors
are connected correctly and completely. The electri-
cal connection check mechanism is designed so
that the disconnection detection pin connects with
the diagnosis terminals when the connector hous-
ing lock is locked.
HINT:
The illustration shows connector º1º, º2º, º3º.
Page 1433 of 1807
AB0089
Secondary Lock
Primary LockLockLock
Primary Lock Incomplete
(Secondary Lock Prevented)Primary Lock Complete
(Secondary Lock Permitted)Twin-Lock Completed
Z14034
Fig.1
Fig.2Power Source
Safing
Sensor
Squibs
Deceleration
Sensor RS-6
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
1945 Author: Date:
1997 SUPRA (RM502U)
(4) Connector Twin-Lock Mechanism
With this mechanism connectors (male and female
connectors) are locked by 2 locking devices to in-
crease the connection reliability. If the primary lock
is incomplete, ribs interfere and prevent the sec-
ondary lock.
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the deceleration sen-
sor go on simultaneously. When a deceleration force acts
on the sensors, 2 squibs in the driver airbag and front pas-
senger airbag ignite and generate gas. The gas discharg-
ing into the driver airbag and front passenger airbag rap-
idly increases the pressure inside the bags, breaking
open the steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag's rear or
side.
Page 1434 of 1807
RS06N-02
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS-7
1946 Author: Date:
1997 SUPRA (RM502U)
STEERING WHEEL PAD AND SPIRAL CABLE
COMPONENTS
Page 1435 of 1807
RS0OM-01
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS-9
1948 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. VEHICLES NOT INVOLVED IN A COLLISION
(a) Do a diagnostic system check.
(See page DI-557)
(b) Do a visual check which includes the following items with
the steering wheel pad (with airbag) installed in the ve-
hicle.
Check cuts, minute cracks or marked discoloration on the
steering wheel pad top surface and in the grooved por-
tion.
2. VEHICLE INVOLVED IN A COLLISION AND AIRBAG IS
NOT DEPLOYED
(a) Do a diagnostic system check.
(See page DI-557)
(b) Do a visual check which includes the following items with
the steering wheel pad (with airbag) removed from the ve-
hicle.
Check cuts minute cracks or marked discoloration
on the steering wheel pad top surface and in the
grooved portion.
Check cuts and cracks in wire harness, and chip-
ping in connectors.
Check the deformation of the horn button contact
plate of the steering wheel.
HINT:
If the horn button contact plate of the steering wheel is de-
formed, never repair it. Always replace the steering wheel
assembly with a new one.
Page 1436 of 1807
RS-10
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
1949 Author: Date:
1997 SUPRA (RM502U)
There should be no interference between the steering
wheel pad and 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 SR-1 1, SR-21 and be sure to follow the correct proce-
dure.
3. VEHICLE INVOLVED IN A COLLISION AND AIRBAG IS
DEPLOYED
(a) Do a diagnostic system check.
(See page DI-557)
(b) Do a visual check which includes the following items with
the steering wheel pad (with airbag) removed from the ve-
hicle.
Check the deformation on the horn button contact
plate of the steering wheel.
Check the damage on the spiral cable connector
and wire harness.
HINT:
If the horn button contact plate of the steering wheel is de-
formed, never repair it. Always replace the steering wheel
assembly with a new one.
There should be no interference between the steering
wheel pad and steering wheel, and the clearance should
be uniform all the way around when the new steering
wheel pad is installed on the steering wheel.
Page 1437 of 1807
RS0ON-01
AB0152
SST
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS-1 1
1950 Author: Date:
1997 SUPRA (RM502U)
DISPOSAL
HINT:
When a scrapping vehicle equipped with an SRS or disposing
of a steering wheel pad (with airbag), always first deploy the air-
bag in accordance with the procedure described below. If any
abnormality occurs with the airbag deployment, contact the
SERVICE DEPT. of TOYOTA MOTOR SALES, U.S.A., INC.
When disposing of a steering wheel pad with an airbag
deployed in a collision, follow the same procedure given in step
1-(g) in ºDISPOSALº.
CAUTION:
Never dispose of a steering wheel pad which has an
undeployed airbag.
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.
When deploying the airbag, always use the specified
SST (SRS Airbag Deployment Tool). Perform the op-
eration in a place away from electrical noise.
SST 09082-00700, 09082-00760
When deploying an airbag, perform the operation at
least 10 m (33 ft) away from the steering wheel pad.
The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.
Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
Page 1438 of 1807
AB0158
SSTBattery
AB0152
SST
AB0158
SSTBattery
H01580
SST
RS-12
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
1951 Author: Date:
1997 SUPRA (RM502U)
1. AIRBAG DEPLOYMENT WHEN SCRAPPING VE-
HICLE
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Confirm functioning of the SST.
CAUTION:
When deploying the airbag, always use the specified SST:
SRS Airbag Deployment Tool.
SST 09082-00700
(1) Connect the SST to the battery.
Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip to the battery neg-
ative (-) terminal.
HINT:
Do not connect the yellow connector which will be connected
with the supplemental restraint system.
(2) Confirm functioning of the SST.
Press the SST activation switch, and check that the
LED of the SST activation switch lights up.
CAUTION:
If the LED lights up when the activation switch is not being
pressed, SST malfunction is probable, so definitely do not
use the SST.
(b) Install the SST.
CAUTION:
Check that there is no looseness in the steering wheel and
steering wheel pad.
(1) Remove the finish panel lower and finish panel low-
er LH.
(2) Remove the heater to register duct No. 2.
(3) Disconnect the airbag connector of the spiral cable.
Page 1439 of 1807
R13455
10 m (33 ft) or more
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS-13
1952 Author: Date:
1997 SUPRA (RM502U)
(4) Connect the SST connector to the airbag connector
of the spiral cable.
SST 09082-00700
(5) Move the SST at least 10 m (33 ft) away from the
front of the vehicle.
(6) Close all the doors and window of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(7) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the negative (-) termi-
nal.
(c) Deploy the airbag.
(1) Confirm that no one is inside the vehicle or within 10
m (33 ft) area around the vehicle.
(2) Press the SST activation switch and deploy the air-
bag.
HINT:
The airbag deploys simultaneously as the LED of the SST ac-
tivation switch lights up.
(d) Dispose of steering wheel pad (with airbag).
CAUTION:
The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.
Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
(1) When scrapping a vehicle, deploy the airbag and
scrap the vehicle with the steering wheel pad still
installed.
(2) When moving a vehicle for scrapping which has a
steering wheel pad with deployed airbag, use
gloves and safety glasses.
Page 1440 of 1807
R05748
L
M RS-14
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
1953 Author: Date:
1997 SUPRA (RM502U)
2. DEPLOYMENT WHEN DISPOSING OF STEERING
WHEEL PAD ONLY
NOTICE:
When disposing of the steering wheel pad (with air-
bag) only, never use the customers vehicle to deploy
the airbag.
Be sure to follow the procedure given below when de-
ploying the airbag.
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Remove the steering wheel pad.
(See page SR-1 1)
CAUTION:
When storing the steering wheel pad, keep the upper sur-
face of the pad facing upward.
(b) Fix the steering wheel pad to the disc wheel with tire.
(1) Install the 2 bolts with washers in the 2 bolt holes on
the steering wheel pad.
Bolt:
L: 35. mm (1.387 in.)
M: 6.0 mm (0.236 in.)
Pitch: 1.0 mm (0.039 in.)
NOTICE:
Tighten the bolts by hand until the bolts become diffi-
cult to turn.
Do not tighten the bolts too much.