1997 TOYOTA SUPRA steering

POWER STEERING
PRESSURE SW
DOOR LOCK MOTOR AND
DOOR UNLOCK
DETECTION SW LH
DOOR KEY LOCK AND
UNLOCK SW LH
REMOTE CONTROL
MIRROR AND MIRROR
HEATER LH
POWER WINDOW MASTER
SW
PERSONAL LI GHT
AIRBAG
SENSOR
ASSEMBLY
POWER MAIN RELAY
INTEGRATION RELAY
LIGHT CONTROL SW
[COMB. SW]
DI MME R SW
[COMB. SW]
DAYTIME RUNNING
LI GHT RELAY NO . 3MAIN HEATED
OXYGEN SENSOR
(
BANK 1 SENSOR 1)
MAIN HEATED
OXYGEN SENSOR
(
BANK 2 SENSOR 1)
(
E1)
CRUISE CONTROL
ECU
KI CK DOWN SW
CRUISE CONTROL SW
[C OMB . SW ]
UNLOCK WA RNI NG SW
KEY INTERL OCK
SOLENOI D
[UNLOCK WARNING SW]
WIPER AND WASHER SW
[C OMB . SW ]
RHEOSTAT
RE MOTE CO NT ROL
MIRROR SW
TELLTALE LIGHT LH
TURN SIGNAL
FL AS HER I17 E27
E28
I17
I 9
I 2
I 2
I 3
I 3
I 1 B 1 B 1 B 1IJ118
ED E28
4
IE(
E01)
(
E02)
W- B
W- B
IB513
W- B
(
*1) W- B
(
*1)(
*4) BR BR BR
BR
BR
BR
BR BR
BR
BR
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B W- BW- B W- B W- B
W- B W- B W- B W- B W- B W- B W- B
W- B
W- B
W- BBR
BR BR BR W- B W- B
(
E1)
(
E2)W- B
W- B
W- B
W- B W- B DA TA L I NK
CONNECTOR 2
DA TA L I NK
CONNECTOR 1
E NGI NE CONTROL
MODULE
(
A/T) BR
(
E03)
I 2W- B
W- B
W- B(
*2)
(
*1)
(
*1)(
*1)
(
*2) SUB HE ATED OXYGE N
SENSOR
(
BANK 1 SENSOR 2)E28
BR A A BR
J 2
JUNCTION
CONNE CTOR
BR
CRUISE CONTROL
ACTUATOR W- B
IB617
W- B
I 9 : * 3
I 4 : * 4
1H13
1K12
1E18
1J1
1K6 1D10
1F6
1G3
IG4
1K5
241
* 4 : 2JZ- GE *2 : USA * 1 : CANADA * 3 : 2JZ- GTE

1 21 2
2 1
1 2
E28 E28
IEIJ1 11
IJ 2 12 IJ2 3A 4 A 20
B 24 B46 A3A18 B25 B7
3 12 8
4 OIL THG KD M G2 G-
W- B W- BB- R
O
BR- Y W- B W- B
W- B W- B
W- B
G- Y
W
GG- YY
G- W G- W WB- R
Y- L
(
SHIELDED)(
SHIELDED) STP TE1FROM P OWER SOURCE SYSTEM (
SEE PAGE 56)
STOP LIGHT
SW DA TA L INK
CONNECTOR 1
S11 D 1
Y A/T FLUID TEMP. SENSOR
EGR GAS TEMP. SENSOR
KICK DOWN SWA 5
E 1
K 4
ELECTRONICALLY CONTROLLED
TRANSMISSION PATTERN
SELECT SW E 8 ENGINE CONTROL MODULEA E 9 , E10B
B 26G1
R
B 27NE
B
1234
DISTRIBUTOR D 4
BR A 32PS
1 2
BR- W BRPOWER STEERING
PRESSURE SW P 3
B 65
W- B
E2
1J 11H 13
NORMAL
MANUAL
NE G1 G2 G-
TE1 +B
15A
STOP
1I 10
152
ELECTRONICALLY CONTROLLED TRANSMISSION

183
THE PPS (HYDRAULIC REACTION TYPE) CONTROLS THE HYDRAULIC PRESSURE APPLIED TO THE HYDRAULIC
REACTION CHAMBER IN THE GEAR BOX CONTROL UNIT USING THE PPS ECU, TO CHANGE THE STEERING FORCE
AND PROVIDE OPTIMUM STEERING FEELING AT ANY VEHICLE SPEEDS AND UNDER ANY STEERING CONDITIONS.
(PPS OPERATION)
WHEN THE IGNITION SW IS TURNED ON THE STARTING CURRENT FLOWS FROM THE ECU-IG FUSE TO TERMINAL
4 OF THE PPS ECU. THE PPS ECU MONITORS VEHICLE SPEED, INPUT SIGNAL TO TERMINAL 5 OF THE ECU.
WHEN THE VEHICLE SPEED IS LOW, THE PPS ECU SENDS A HIGHER-CURRENT FROM TERMINAL 1 OF THE ECU 
TERMINAL 1 OF THE SOLENOID VALVE TERMINAL 2 TERMINAL 2 OF THE ECU TERMINAL 6 
GROUND, INCREASING THE SOLENOID VALVE OPENING ANGLE TO PROVIDE COMFORTABLE STEERING
OPERATION. WHEN THE VEHICLE SPEED IS HIGH, THE PPS ECU DECREASES THE SOLENOID VALVE OPENING
ANGLE BY REDUCING THE CURRENT TO THE VALVE TO PROVIDE RESPONSIVE STEERING FEELING.
P1 PPS SOLENOID
1-2 : APPROX. 7.7 W (25
C, 77
F)
P4 PPS ECU
4-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
6-GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C10A28P127 (2JZ-GE)V1025 (2JZ-GTE)
C12B28P429V1027 (2JZ-GE)
P125 (2JZ-GTE)T629
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
IH36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I838INSTRUMENT PANEL WIREI1438INSTRUMENT PANEL WIRE
SYSTEM OUTLINE
SERVICE HINTS

197
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following
precautionary instructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the supplemental restraint system are difficult to confirm, so the diagnostic trouble
codes become the most important source of information when troubleshooting.
When troubleshooting the supplemental restraint system, always inspect the diagnostic trouble codes before
disconnecting the battery.

Work must be started after 90 seconds from the time the Ignition SW is set to the LOCKº position and the
negative (-) terminal cable is disconnected from the battery.
(The supplemental restraint system is equipped with a back-up power source so that if work is started within 90
seconds of disconnecting the negative (-) terminal cable of the battery, the SRS may be activated.)
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.
When work is finished, reset the clock and audio system as before and adjust the clock.
To avoid erasing the memory of each memory system, never use a back-up power supply from outside the
vehicle.

When removing the steering wheel pad or handling a new steering wheel pad, 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 with its metallic surface up may lead to a serious accident if the SRS inflates for some reason.)

Always store a removed or new front passenger airbag assembly with the airbag door facing up. Storing the
airbag assembly with the airbag door facing down could cause a serious accident if the airbag inflates.

Store the steering wheel pad where the ambient temperature remains below 93C (200F), without high humidity
and away from electrical noise.

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

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, airbag sensor assembly.

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

Do not reuse a steering wheel pad.
After evaluating whether the airbag sensor assembly is damaged or not, decide whether or not to reuse it.
(See the Repair Manual for the method for evaluating the airbag sensor assembly.)

When troubleshooting the supplemental restraint system, use a high-impedance (Min. 10 kW/V) tester.

The wire harness of the supplemental restraint system is integrated with the cowl wire harness assembly. The
vehicle wiring harness exclusively for the airbag system is distinguished by corrugated yellow tubing, as are the
connectors.

Do not measure the resistance of the airbag squibs.
(It is possible this will deploy the airbag and is very dangerous.)

If the wire harness used in the supplemental restraint system is damaged, replace the whole wire harness
assembly.

INFORMATION LABELS (NOTICES) are attached to the periphery of the SRS components. Follow the
instructions on the notices.

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

201
THE SRS IS A DRIVER AND PASSENGER PROTECTION DEVICE WHICH HAS A SUPPLEMENTAL ROLE TO THE SEAT
BELTS.
WHEN THE IGNITION SW IS TURNED TO ACC OR ON, THE CURRENT FROM THE CIG FUSE FLOWS TO TERMINAL 16
OF THE AIRBAG SENSOR ASSEMBLY. ONLY WHEN THE IGNITION SW IS ON DOES THE CURRENT FROM THE IGN
FUSE FLOW TO TERMINAL 15 OF THE AIRBAG SENSOR ASSEMBLY.
IF AN ACCIDENT OCCURS WHILE DRIVING, DECELERATION CAUSED BY A FRONTAL IMPACT IS DETECTED BY THE
SENSOR IN THE AIRBAG SENSOR ASSEMBLY, AND WHEN THE FRONTAL IMPACT EXCEEDS A SET LEVEL (WHEN
THE SAFING SENSOR BUILT INTO THE AIRBAG SENSOR ASSEMBLY IS ON, THE FLOOR SENSOR BUILT INTO THE
AIRBAG SENSOR ASSEMBLY IS ON AND THE AIRBAG SENSOR ASSEMBLY IS ON), THE CURRENT FROM THE CIG OR
THE IGN FUSE FLOWS THROUGH THE AIRBAG SENSOR ASSEMBLY TO TERMINALS 7 AND 3 OF THE AIRBAG
SENSOR ASSEMBLY TO TERMINAL 1 OF THE AIRBAG SQUIB " TERMINAL 2 "TERMINALS 6 AND 2 OF THE
AIRBAG SENSOR ASSEMBLY "THE FLOOR SENSOR BUILT INTO THE AIRBAG SENSOR ASSEMBLY "TERMINAL 9,
TERMINAL 10 OR BODY GROUND "GROUND. WHEN THE SAFING SENSOR BUILT INTO THE AIRBAG SENSOR
ASSEMBLY IS ON, AND FLOOR SENSOR BUILT INTO THE AIRBAG SENSOR ASSEMBLY IS ON, ONE OF THE
ABOVE-MENTIONED CIRCUITS IS ACTIVATED SO THAT THE CURRENT FLOWS TO THE AIRBAG SQUIBS, CAUSING
IT TO OPERATE.
THE AIRBAG STORED INSIDE THE STEERING WHEEL PAD IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE
SHOCK TO A DRIVER.
SIMULTANEOUSLY, THE AIRBAG STORED INSIDE THE PASSENGER'S INSTRUMENT PANEL IS INSTANTANEOUSLY
EXPANDED TO SOFTEN THE SHOCK TO A PASSENGER.
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A2728D124 (2JZ-GTE)T629
A2828D126 (2JZ-GE)
A3428D528
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1G20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I538INSTRUMENT PANEL WIREI1438INSTRUMENT WIRE
SYSTEM OUTLINE

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.

MA01E-01
MA-2
- MAINTENANCEINSIDE VEHICLE
39 Author
: Date
:
1997 SUPRA (RM502U)
INSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
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. LIGHTS
(a) Check that the headlights, stop lights, taillights, turn signal lights, and other lights are all working.
(b) Check the headlight aim.
3. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers function properly.
4. HORN
Check that it is working.
5. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
6. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
7. WINDSHIELD DEFROSTER
Check that air comes out from the defroster outlet when operating the heater or air conditioner.
8. REAR VIEW MIRROR
Check that it is mounted securely.
9. SUN VISORS
Check that they move freely and are mounted securely.
10. STEERING WHEEL
Check that it has the specified freeplay. Be alert for changes in steering condition, such as hard steering,
excessive freeplay or strange noises.
11. SEATS
(a) Check that the seat adjusters operate smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the head restraints move up and down smoothly and that the locks hold securely in any
latch position.
(d) For fold-down seat backs, check that the latches lock securely.
12. SEAT BELTS
(a) Check that the seat belt system such as the buckles, retractors and anchors operate properly and
smoothly.
(b) Check that the belt webbing is not cut, frayed, worn or damaged.