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 1442 of 1807

AB0158
SSTBattery
R05752
SST
AB0164
RS-16
- SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
1955 Author: Date:
1997 SUPRA (RM502U)
(c) Confirm functioning of the SST.
SST 09082-00700
(d) Install the SST.
CAUTION:
Place the disc wheel on the level ground.
Connect the SST connector to the steering wheel pad
connector.
SST 09082-00700
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock. Also, se-
cure some slack for the SST wire harness inside the disc
wheel.
(e) Cover the steering wheel pad with cardboard box or tires.
Covering method using cardboard box:
Cover the steering wheel pad with the cardboard
box and weight the cardboard box down in 4 places
with at least 196 N (20 kg, 44 lb).
Size of cardboard box:
Must exceed the following dimensions:
x=460 mm (18.11 in.)
When dimension of the cardboard box exceeds the di-
ameter of the disc wheel with tire to which the steer-
ing wheel pad is tied -
x=460 mm (18.11 in.) + width of tire
y= 650 mm (25.59 in.)
NOTICE:
If a cardboard box smaller than the specified size is used,
the cardboard box will be broken by the shock from the air-
bag deployment.
Page 1451 of 1807

R13455
10 m (33 ft) or more
RS-26
- SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
1965 Author: Date:
1997 SUPRA (RM502U)
(c) Install the SST.
(1) Connect the connector of SST to the front passen-
ger airbag assembly connector.
SST 09082-00700
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(2) Move the SST to at least 10 m (33 ft) from the front
of the vehicle.
(3) Close all the doors and windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(4) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the negative (+) termi-
nal.
(d) 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.
(e) Dispose of the front passenger airbag assembly.
CAUTION:
The front passenger airbag assembly is very hot
when the airbag is deployed, so leave it alone for at
least 30 minutes after deployment.
Use gloves and safety glasses when handling a front
passenger airbag assembly with deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a front passenger airbag
assembly with deployed airbag.
(1) When scrapping a vehicle, deploy the airbag and
scrap the vehicle with the front passenger airbag
assembly still installed.
(2) When moving a vehicle for scrapping which has a
front passenger airbag assembly with deployed air-
bag, use gloves and safety glasses.
Page 1452 of 1807

AB0163
Wire Harness
Diameter
Stripped Wire Harness Section
- SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
RS-27
1966 Author: Date:
1997 SUPRA (RM502U)
2. DEPLOYMENT WHEN DISPOSING OF FRONT PAS-
SENGER AIRBAG ASSEMBLY ONLY
NOTICE:
When disposing of the front passenger airbag assem-
bly 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 front passenger airbag assembly.
(See page RS-21)
CAUTION:
When removing the front passenger airbag assembly,
work must be started after 90 seconds from the time
the ignition switch is turned to the ºLOCKº position
and the negative (-) terminal cable is disconnected
from the battery.
Store the front passenger airbag assembly with the
airbag deployment direction facing upward.
(b) Fix the front passenger airbag assembly to tire.
(1) Using a service-purpose wire harness for the ve-
hicle, tie down the front passenger airbag assembly
to the tire.
Wire harness: Stripped wire harness section
1.25 mm
2
or more (0.0019 in.2 or more)
HINT:
To calculate the square of the stripped wire harness section:
Square = 3.14 X (Diameter)
2 divided by 4
CAUTION:
If a wire hsrness which is too thin or some other thing is
used to tie down the front passenger airbag assembly it
may be snapped by the shock when the airbag is deplayed.
This is highly dangerous. Always use a wire harness for ve-
hicle use which is at least 1.25 mm
2
(0.0019 in2).
(2) Wrap the wire harness around the tire, passing the
wire harness through the installation holes indi-
cated by arrows in the installation.
Page 1454 of 1807

R09690
Battery
SSTFront Passenger
Airbag Assembly
10 mm (33 ft) or more
R09687
- SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
RS-29
1968 Author: Date:
1997 SUPRA (RM502U)
(e) Install the SST.
Connect the connector of SST to the front passenger air-
bag assembly connector.
SST 09082-00700
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(f) Deploy the airbag.
(1) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the battery negative
(-) terminal.
(2) Confirm that no-one is within 10 m (33 ft) area
around the tire which the front passenger airbag as-
sembly is tied to.
(3) 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.
(g) Dispose of the front passenger airbag assembly.
CAUTION:
The front passenger airbag assembly is very hot
when the airbag is deployed, so leave it alone for at
least 30 minutes after deployment.
Use gloves and safety glasses when handling a front
passenger airbag assembly with deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a front passenger airbag
assembly with deployed airbag.
(1) Remove the front passenger airbag assembly from
the tire.
(2) Place the front passenger airbag assembly in a vi-
nyl bag, tie the end tightly and dispose of it in the
same way as other general parts.
Page 1462 of 1807

P03244
Lock
Press Down
P03245
LockInsert
P13048
SST
P12072
Fuel Pump
Connector SF-2
- SFI (2JZ-GTE)SFI SYSTEM
1328 Author: Date:
1997 SUPRA (RM502U)
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (-) cables.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal con-
tact can further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) When inspecting a connector with a volt/ohmmeter
(1) Carefully take out the water-proofing rubber if it is
a water-proof type connector.
(2) Insert the test probe into the connector from the wir-
ing side when checking the continuity, amperage or
voltage.
(3) Do not apply unnecessary force to the terminal.
(4) After checking, install the water-proofing rubber on
the connector securely.
(j) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842-30060
8. FUEL SYSTEM
(a) When disconnecting the high pressure fuel line, a large
amount of gasoline will spill out, so observe the following
procedures:
(1) Disconnect the fuel pump connector.
(2) Start the engine. After the engine has stopped on
its own, turn off the ignition switch.