1997 TOYOTA SUPRA steering

Steering Wheel Pad
(with Airbag) Junction Block No. 1Center Airbag Sensor Assembly Front Airbag Sensor LHFront Passenger Airbag Assembly Front Airbag Sensor RHSRS Warning Light
Spiral Cable
Locations of SRS Components
HANDLING PRECAUTIONS ON RELATED COMPONENTS
1. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Servicing vehicle with a Supplemental Restraint System (referrerd to as the SRS in the remainder of this
manual) installed.
When handling SRS components (removal, installation or inspection, etc.), always follow the directions
given in the repair manual for the relevant model year to prevent the occurrence of accidents and airbag
malfunction.
Also take the following precautions when repairing the body:

Work must be started after 90 seconds or longer from the time the ignition switch is set to the LOCK
position and the negative (-) terminal cable is disconnected from the battery.
(The airbag system is equipped with a backup power source so that if work is started within 20 seconds
of disconnecting the negative (-) terminal cable of the battery, the airbag may be deployed.)
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio
systems will be cancelled. So before starting work, make a record of the contents memorized by each
memory system. Then when work is finished, reset the clock and audio systems as before.
When the vehicle has tilt and telescopic steering, power seat, outside rear view mirror and power shoul-
der belt anchorage, which are all equipped with memory function, it is not possible to make a record of
the memory contents. So when the operation is finished, it will be necessary to explain this fact to the
customer, and request the customer to adjust the features and reset the memory.

When using electric welding, first disconnect the SRS connector (yellow color and 2 pins) under the
steering column near the combination switch connector on the glove compartment finish plate and lower
the front scuff plate before starting work.
INTRODUCTIONIN-6

Front Fender Area

Before repairing the body, remove the SRS parts if, during repair, shocks are likely to be applied to
the sensors due to vibrations of the body or direct tapping with tools or other parts.

Do not expose the SRS parts directly to hot air or flames.
NOTICE:
1) The maximum ambient temperature tolerance is 120
°C (248°F) for the front airbag sensor,
105
°C (221°F) for the center airbag sensor assembly and 93°C (200°F) for the steering wheel
pad, and front passenger airbag assembly. If it is possible that the ambient temperature may
reach or exceed the temperature limit, remove the sensors and the steering wheel pad from
the vihicle or protect them with a hot insulation material before starting work.
2) Prior to welding, remove adjacent SRS parts from the vehicle or protect there with fire-proof
covers.

If the front fender or periphery of the vehicle is damaged, visually inspect for damage to the front
airbag sensor using the inspection procedures described in section RS of the repair manual for the
relevant model year.
Also check that the dimensions of the body where the front airbag sensor is installed match those
in the body dimension drawings.
(The airbag may malfunction, or may not work, if the mounting angle or dimensions of the sensor
mount are not correct.)

If the vehicle is damaged, visually inspect for damage to the steering wheel pad using the inspection
procedures described in section RS of the repair manual for the relevant model year.

When removing or handling the steering wheel pad, and front passenger airbag assembly keep the
pad upper surface facing upward. Also, lock the lock lever of the twin lock type connector at the rear
of the pad and take care not to damage the connector.
(Storing the pad or front passenger airbag assembly with its metalic surface up may lead to a serious
accident if the airbag inflates for some reason.)

Store the steering wheel pad and the front passenger airbag assembly where the ambient tempera-
ture remains below 93°C (200°F), without high humidity and away from electrical noise.

Be careful not to let painting materials contact the SRS parts.

Information labels are attached to the periphery of the SRS components. Follow the NOTICES.

Store the airbag assembly where the ambient temperature remains below 93°C (200°F), without high
humidity and away from electrical noise.
INTRODUCTIONIN-7

Light Failure Sensor Fuel Pump ECURear Wiper Relay
5. COMPONENTS ADJACENT TO THE BODY PANELS Locations of ECUs (Cont'd)
Many ECUs are mounted in this vehicle.
Take the following precautions during body repair to prevent damage to the ECUs.

Before starting electric welding operations, disconnect the negative (-) terminal cable from the battery.
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio
systems will be cancelled. So before starting work, make a record of the contents memorized by each
memory system. Then when work is finished, reset the clock and audio systems as before.
When the vehicle has tilt and telescopic steering, power seat and outside rear view mirror, which are all
equipped with memory function, it is not possible to make a record of the memory contents.
So when the operation is finished, it will be necessary to explain this fact to the customer, and request
the customer to adjust the features and reset the memory.

Do not expose the ECUs to ambient temperatures above 80°C (176°F).
NOTICE: if it is possible the ambient temperature may reach 80°C (176°F) or more, remove the ECUs
from the vehicle before starting work.

Be careful not to drop the ECUs and not to apply physical shocks to them.
Various types of component parts are mounted directly on or adjacently to the body panels.
Strictly observe the following precautions to prevent damaging these components and the body panels
during handling.

Before repairing the body panels, remove their components or apply protective covers over the
components.

Before prying components off using screwdriver or a scraper, etc., attach protective tape to the tool
tip or blade to prevent damaging the components an the body paint.

Before removing components from the outer surface of the body, attach protective tape to the body
to ensure no damage to painted areas.
HINT: Apply touch-up paint to any damaged paint surfaces.

Before drilling or cutting sections, make sure that there are no wires, etc. on the reverse side.
INTRODUCTIONIN-9

ABS Antilock Brake System
A/C Air Conditioner
assy assembly
ECT Electronic Controlled Transmission
ECU Electronic Control Unit
e.g. Exempli Gratia (for Example)
Ex. Except
FWD Front Wheel Drive Vehicles
4WD Four Wheel Drive Vehicles
in. inch
LH Left-hand
LHD Left-hand Drive
MIG Metal Inert Gas
M/Y Model Year
PPS Progressive Power Steering
RH Right-hand
RHD Right-hand Drive
SRS Supplemental Restraint System
w/ with
w/o without
ABBREVIATIONS USED IN THIS MANUAL
For convenience, the following abbreviations are used in this
manual.
INTRODUCTIONIN-16

BO6850
BO6850mm (in.) Imaginary
Standard
Line
(Two-Dimensional Distance)
Imaginary
Standard
Line
(Three-Dimensional Distance)
Symbol Name Hole dia. Symbol Name Hole dia.
A, a Steering gear box installation hole front 12 (0.47) E, e Lower arm installation hole-front25y16
(0.98y0.63)
B, b Upper arm installation hole front 14 (0.55) F, f Lower arm installation hole rear25y16
(0.98y0.63)
C, cSuspension crossmember installation
hole front-lower15 (0.59) G, g Upper arm installation hole rear 14 (0.55)
D, dSteering gear box installation hole-
lower12 (0.47) H, hSuspension crossmember installation
hole rear-lowerRH 15y13
(0.59 x 0.51)
LH 13 (0.51)
FRONT SUSPENSION CROSSMEMBER
BODY DIMENSIONSDI-10

Steering Wheel Pad (PUR)
Quarter Wheel Housing Inner Cover (PP)
Rear Combination Lamp (PMMA/PC/PP)
Instrument Panal Passenger
Air Bag (PVC/PUR)
Center Stop Lamp (PMMA/ABS)
Deck Trim Side Board (PP)
Quarter Vent Duct (PP)
Front Fender
Mudguard (PP)
Air Conditioner Unit (PP)
Licence Plate Lamp (PC/PP)
Rear Bumper Cover (PUR) Fuel Filler Opening Lid (PBT)
Rear Side Marker
Lamp (PMMA/ABS)
Fuel Tank Filler
Pipe Protector
(PE)
Back Door Trim Board (PP/PE) Fuel Tank (PE)
Deck Trim Rear Cover (PP/PE)
HINT:
w Resin material differs with model.
/ Made up of 2 or more kinds of materials.
PLASTIC BODY PARTSPP-6

SRS AIRBAG COMPONENT REPLACEMENT (cont'd) PAGE 5 of 6
Component Replacement Notes
Note 1 ± Replace the following items:

Instrument panel

Center console bracket support
Note 2 ± Replace the following items if deformed:

Instrument panel

Instrument panel reinforcement

Glove compartment

Glove compartment door
Note 3 ± Replace the following items:

Instrument panel reinforcement

Glove compartment

Glove compartment door
Note 3a ± Replace the following items:

Instrument panel

Instrument panel reinforcement

Glove compartment door
Note 4 ± If the SRS wire harness assembly is damaged:

Use a repair wire specially designed for use in the SRS airbag system at the front
sensor (P/N 82988±24010).
OR

Replace the entire wire harness assembly.
Note 4a ± Replace wire harness if damaged.

Repair only if wire harness connector is damaged.
Note 4b ± Replace wire harness if damaged.
Note 5 ± Replace the following items if deformed:

Steering wheel

Spiral cable
Note 6 ± Replace center airbag sensor assembly if:

Center airbag sensor assembly has been found faulty in troubleshooting

Center airbag sensor assembly has been found faulty during the following checks:
1. Deformation of the bracket or case
2. Vinyl seal broken
3. Damage to connector

Center airbag sensor assembly has been dropped.

SRS COMPONENT REPLACEMENT (cont'd) PAGE 4 of 4
Component Replacement Notes
Note 1 ± Visually inspect and replace the following items if deformed:
Instrument panel and center console bracket support
Note 2 ± Visually inspect and replace the following items if deformed:
Instrument panel and Instrument panel reinforcement
Glove compartment and glove compartment door
Note 2a ± Same as note 2 without involving the glove compartment.
Note 3 ± If the SRS wire harness is damaged only at the connectors to the front
sensors:
Use a repair wire specially designed for use in the SRS airbag system at the front sensor
(PN 82988±24010/50010/33010).
OR
Replace the entire wire harness assembly.
Note 3a ± Replace the entire wire harness if damaged or has been found to be faulty
during troubleshooting.
Note 4 ± Replace the following items if deformed or if diagnostic tests show a fault:
Steering wheel (If the horn button contact plate has been deformed, never attempt to
repair it±always replace the steering wheel).
Spiral cable
Note 5 ± Replace center airbag sensor assembly if:
Center airbag sensor assembly has been found faulty in troubleshooting.
Center airbag sensor assembly shows evidence of the following:
1. Deformation of the bracket or case
2. Vinyl seal broken
3. Damage to connector
Center airbag sensor assembly has been dropped.
Note 6 ± Replace side impact sensors and side airbag assembly with seat cover if
deployed. Side airbag circuits are independent from each other, and one
side may deploy while the other does not.
Note 7 ± 1998 Tacoma is equipped with a passenger airbag cutoff switch. If the
switch is ªOFFº when impact occurs, replace the switch. If the switch is in
the ªONº position when impact occurs, and the passenger airbag deploys,
check the switch as directed by the Repair Manual.