1997 TOYOTA SUPRA power steering

152
II1 12 II121 IF12IF111
I14
I14
I 5
15 16 5 8
76 32 109D+ D- P+ P- E1 E2AB TC AB TC
511 12 4
P- B B- Y B
P- B
B- O
GR
BW-R
B- Y (
*1)
P- B (
*1)
B
R B
P- B
B
P- B B
P- B
SRS WARNING
LIGHT
[TELLTALE
LIGHT RH] T 6DATA LINK
CONNE CTOR 1DATA LINK
CONNECTOR 2 D 1 D 5 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
IE 12
12
A27 A2 8IG2 ACC LA TC
AIRBAG SQUIB
(
STEERING WHEEL
PAD)AIRBAG SQUIB
(
FRONT PASSENGER
AIRBAG ASSEMBLY) AIRBAG SENSOR ASSEMBLY
W- BR
W
L
Y
W- B
W- B
A34
B (
*2)
R (
*2)
*2 : 2JZ- GE *1 : 2JZ- GTE
7. 5A
IGN15A
CIG10A
ECU- B
1G 10 1G61E13
1E3 1E4
1G7 1G9
1G 31G4
1J 1

SPIRAL
CABLE
200
SRS

MA01F-02
MA-4
- MAINTENANCEUNDER HOOD
41 Author
: Date
:
1997 SUPRA (RM502U)
UNDER HOOD
GENERAL MAINTENANCE
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. WINDSHIELD WASHER FLUID
Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
Check that the coolant level is between the ºFULLº and ºLOWº lines on the see-through reservoir.
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
5. BATTERY ELECTROLYTE LEVEL
Check that the electrolyte level of all battery cells is between the upper and lower level lines on the case.
6. BRAKE AND CLUTCH FLUID LEVELS
Check that the brake and clutch fluid levels are near the upper level line on the see-through reservoirs.
7. ENGINE DRIVE BELT
Check drive belt for fraying, cracks, wear or oil contamination.
8. ENGINE OIL LEVEL
Check the level on the dipstick with the engine turned off.
9. POWER STEERING FLUID LEVEL

Check the level on the dipstick.

The level should be in the ºHOTº or ºCOLDº range depending on the fluid temperature.
10. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking brake applied, shift the selector into all positions from ºPº to ºLº,
and then shift into ºPº position.
(c) Pull out the dipstick and wipe off the fluid with a clean rag. Re-insert the dipstick and check that the
fluid level is in the HOT range.
(d) Do this check with the fluid at normal driving temperature (70 - 80°C, 158 - 176°F).
HINT:
Wait until the engine cools down (approx. 30 min.) before checking the fluid level after extended driving at
high speeds, in hot weather, in heavy traffic or pulling a trailer.
11. EXHAUST SYSTEM
If any change in the sound of the exhaust or smell of the exhaust fumes is noticed, have the cause located
and corrected.

RS06L-02
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-1
1940 Author
: Date
:
1997 SUPRA (RM502U)
SRS AIRBAG
PRECAUTION
NOTICE:

The SUPRA is equipped with SRS, which comprises a driver airbag, front passenger airbag.
Failure to carry out service operations in the correct sequence could cause the SRS to unex-
pectedly deploy during servicing, possibly leading to a serious accident. Further, if a mistake
is made in servicing the SRS, it is possible that the SRS may fail to operate when required. Be-
fore performing servicing (including removal or installation of parts, inspection or replace-
ment), be sure to read the following items carefully, then follow the correct procedures de-
scribed in the repair manual.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly and airbag sensor assembly should be inspected (See page RS-9
, RS-22 and RS-34).

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly or air-
bag sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly or airbag sensor assembly has been
dropped, or if there are cracks, dents or other defects in the case, bracket or connector, replace
them with new ones.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.

After work on the SRS is completed, perform the SRS warning light check (See page DI-557).

If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
CAUTION:

Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº
position and the negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds
from disconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)

When the negative (-) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back- up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

Do not expose the steering wheel pad, front passenger airbag assembly or airbag sensor as-
sembly directly to hot air or flames.

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.

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.

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.

SR13T-01
SR-2
- STEERINGTROUBLESHOOTING
1886 Author
: Date
:
1997 SUPRA (RM502U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, repair or replace these parts.
SymptomSuspect AreaSee page
Hard steering
1. Tires (Improperly inflated)
2. Power steering fluid level (Low)
3. Drive belt (Loose)
4. Front wheel alignment (Incorrect)
5. Steering system joints (Worn)
6. Suspension arm ball joints (Worn)
7. Steering column (Binding)
8. Power steering gear
9. PPS systemSA-2
SR-4
-
SA-3
-
SA-30
SA-35
-
-
SR-54
Poor return
1. Tires (Improperly inflated)
2. Front wheel alignment (Incorrect)
3. Steering column (Binding)
4. Power steering gearSA-2
SA-3
-
-
Excessive play
1. Steering system joints (Worn)
2. Suspension arm ball joints (Worn)
3. Intermediate shaft, Universal joint, Sliding yoke (Worn)
4. Front wheel bearing (Worn)
5. Power steering gear
6. PPS system-
SA-30
SA-35
-
SA-12
-
SR-54
Abnormal noise
1. Power steering fluid level (Low)
2. Steering system joints (Worn)
3. Power steering gearSR-4
-
-

SR13U-01
R07281
Normal
Abnormal
- STEERINGPOWER STEERING FLUID
SR-3
1887 Author
: Date
:
1997 SUPRA (RM502U)
POWER STEERING FLUID
BLEEDING
1. CHECK FLUID LEVEL
(See page SR-4)
2. JACK UP FRONT OF VEHICLE AND SUPPORT IT
WITH STANDS
3. TURN STEERING WHEEL
With the engine stopped, turn the steering wheel slowly from
lock to lock several times.
NOTICE:
Take care that some fluid remains in the oil reservoir.
4. LOWER VEHICLE
5. START ENGINE
Run the engine at idle for a few minutes.
6. TURN STEERING WHEEL
(a) With the engine at idling, turn the steering wheel to left or
right full lock and keep it there for 2-3 seconds, then turn
the wheel to the opposite full lock and keep it there for 2-3
seconds.
(b) Repeat (a) several times.
7. STOP ENGINE
8. CHECK FOR FOAMING OR EMULSIFICATION
If the system has to be bled twice specifically because of foam-
ing or emulsification, check for fluid leaks in the system.
9. CHECK FLUID LEVEL
(See page SR-4)