high beam TOYOTA SUPRA 1997 Service Repair Manual

25 SUPRAÐ NEW FEATURES
NEW FEATURES
 EXTERIOR DESIGN
1. Headlights, Turn Signal Light and Front Bumper
Multi±reflector type headlights, which contain a multiple paraboloid reflector, have been adopted for the
high±beam headlights. Accordingly, the lens cut in headlights has been significantly decreased to improve the
appearance.
The shape of the turn signal light lenses has been matched to the curvature of the bumper in order to make them
appear integrated with the bumper. In addition, clear lenses are used, and the parking lights gave been changed from
those enclosed in the headlights to those enclosed in the turn signal lights.
A bar has been added to the air intake opening in the center of the front bumper.
2. Rear Combination Light
The lens cut of the rear combination lights has been changed from the vertical cut to the lateral cut. In addition, the
rear combination lights have adopted multi±reflectors. As a result of these changes a light design has been achieved
to give a sensor for translucency and depth.

BE-8
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1986 Author
: Date
:
1997 SUPRA (RM502U) Security Indicator Light does not light up.
1. Light Emitting Diode
2. Theft Deterrent and Door Lock ECU
3. Wire Harness
DI-608
A/T Shift Position Indicator Light does not light up.
1. Bulb
2. Park/Neutral Position Switch
3. Light Control Rheostat
4. Meter Circuit
5. Wire Harness
DI-354
DI-423
BE-43
BE-40
MANU Indicator Light does not light up.
1. Bulb
2. ECM
3. Meter Circuit
4. Wire Harness
BE-40
O/D OFF Indicator Light does not light up.
1. Bulb
2. O/D Main Switch
3. ECM
4. Meter Circuit
5. Wire Harness
BE-43
DI-1
DI-145
BE-40
TRAC Indicator Light does not light up.
1. Bulb
2. ABS and Traction ECU
3. Meter Circuit
4. Wire Harness
BE-40
Turn Indicator Light does not light up.
1. Bulb
2. Turn Signal and Hazard Warning System
3. Meter Circuit
4. Wire Harness
BE-25
BE-40
High Beam Indicator Light does not light up.
1. Bulb
2. Headlight and Taillight System
3. Meter Circuit
4. Wire Harness
BE-15
BE-40
CRUISE Indicator Light does not light up.
1. Bulb
2. Cruise Control ECU
3. Meter Circuit
4. Wire Harness
DI-660
BE-40
SNOW Indicator Light does not light up.
1. Bulb
2. Traction ECU
3. Meter Circuit
4. Wire Harness
BE-40
ELECTRIC TENSION REDUCER SYSTEM
SymptomSuspect AreaSee page
Tension Reducer does not operate.
(Driver's and Passenger's)1. ECU-IG fuse (J/B No.1)
2. Wire Harness
Tension Reducer does not operate. (Only one side)
1. Buckle Switch
2. Tension Reducer Solenoid
3. Wire HarnessBE-54
BE-43

Z09366
HEAD
TAIL
Connector ºAºFlash
BE0DS-02
Z09181
34
2 14
3
1
2
Z05930
3
5
21
531 2
- BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
BE-17
1995 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT LIGHT CONTROL SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF-No continuity
TAILA2 - A11Continuity
HEADA2 - A11 - A13Continuity
If continuity is not as specified, replace the switch.
2. INSPECT HEADLIGHT DIMMER SWITCH CONTINU-
ITY
Switch positionTester connectionSpecified condition
FlashA9 - A12 - A14Continuity
Low beamA3 - A9Continuity
High beamA9 - A12Continuity
If continuity is not as specified, replace the switch.
3. INSPECT HEADLIGHT CONTROL RELAY CONTINU-
ITY
ConditionTester connectionSpecified condition
Constant3 - 4Continuity
Apply B+ between
terminal 3 and 4.1 - 2Continuity
If continuity is not as specified, replace the relay.
4. INSPECT TAILLIGHT RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
5. Light Auto Turn Off System:
INSPECT INTEGRATION RELAY CIRCUIT (See page
BE-13)

Z07503
Wire Harness Side
Z09181
34
2 143
12 BE-18
- BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
1996 Author
: Date
:
1997 SUPRA (RM502U)
6. INSPECT DOOR COURTESY SWITCH CONTINUITY
(See page BE-28)
7. CANADA models only:
INSPECT D.R.L. MAIN RELAY CIRCUIT
Disconnect the connector from relay and inspect the connector
on wire harness side, as shown.
Tester connectionConditionSpecified condition
5 - GroundHeadlight dimmer switch position Low beam or
high beamNo continuity
5 - GroundHeadlight dimmer switch position FlashContinuity
8 - GroundParking brake switch position OFFNo continuity
8 - GroundParking brake switch position ONContinuity
16 - GroundHeadlight dimmer switch position Low beamNo continuity
16 - GroundHeadlight dimmer switch position Flash or High
beamContinuity
13 - GroundConstantContinuity
18 - GroundConstantContinuity
2 - GroundIgnition switch position LOCK or ACCNo voltage
2 - GroundIgnition switch position ONBattery positive voltage
11 - GroundEngine StopNo voltage
11 - GroundEngine RunningBattery positive voltage
15 - Ground
17 - GroundConstantBattery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuit connected to
other parts.
8. INSPECT D.R.L. NO.2 RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant3 - 4Continuity
Apply B+ between
terminals 3 and 4.1 - 2Continuity
If continuity is not as specified, replace the relay.

I02078
Cruise Control Indicator :Fuel Gauge
:Engine Coolant Temperature Gauge
:Tachometer
:Speedometer
D.R.L. :Daytime Running Light
* :Engine Oil Level Delay Circuit
F
E
T
S
F
E
T
S C8
A10
A11
A9
A8
A13
C11
C10
B13
B12
B2
A1
C7
C5
A14
A7
A6
A3
C1
C2
C13
A5P
R
N
D
2
LB4
B10
B6
B7
B8
B11
B1
C9
A16
C4
C6
A15
A2
B3
C12 Fuel Level Warning
MANU Indicator
O/D OFF Indicator
Brake Warning
Bulb Check Relay
TRAC Indicator
Right Turn Indicator
High Beam Indicator
Master Warning
Illumination
SNOW IndicatorLeft Turn Indicator
No. Wire Harness Side
Brake Fluid Level Warning Switch
Parking Brake Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Headlight Dimmer Switch
ECT ECU
Cruise Control ECU
TRAC ECU
Ground (Engine)
Engine Coolant Temperature Sender Gauge
Fuel Sender Gauge
Ground (Signal)
Turn Signal Switch
Starter Relay Generator L Terminal Igniter
Park/Neutral Position Switch (A/T Vehicle) A1
2
3
5
6
7
8
9
10
11
13
14
15
16
BGAUGE Fuse
O/D OFF Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Park/Neutral Position Switch (P)
Park/Neutral Position Switch (N)
ECT ECU
Ground (Power)
Park/Neutral Position Switch (D)
Park/Neutral Position Switch (2)
Park/Neutral Position Switch (L) Park/Neutral Position Switch (R) 1
2
3
6
7
8
10
11
124
13
Engine Oil Level Sensor
Turn Signal Switch
Ground (Power)
Fuel Sender Gauge
GAUGE Fuse
Vehicle Speed Sensor (Terminal 2)
Vehicle Speed Sensor (Terminal 3)
USA:TAIL (RH) Fuse, PANEL Fuse
Light Control Rheostat Telltail Light RH (Terminal 11)
Telltail Light LH (Terminal 1)
Telltail Light LH (Terminal 6) 1
2
6
7
8
10
11
124
135
9 CCANADA:D.R.L. No.3 Relay
Clutch Start Switch (M/T Vehicle)
CANADA:D.R.L. No.3 Relay
CANADA:D.R.L. No.3 Relay
- BODY ELECTRICALCOMBINATION METER
BE-41
2019 Author
: Date
:
1997 SUPRA (RM502U)

BE2820
Multipath
BE2821
Fade Out
N17398
Example :
HeadCapstan
Pinch Roller
- BODY ELECTRICALAUDIO SYSTEM
BE-73
2051 Author
: Date
:
1997 SUPRA (RM502U)
(b) Multipath
One type of interference caused by the bounce of radio
waves off of obstructions is called ºmultipathº. Multipath
occurs when a signal from the broadcast transmitter an-
tenna bounces off buildings and mountains and interferes
with the signal that is received directly.
(c) Fade Out
Because FM radio waves are of higher frequencies than
AM radio waves, they bounce off buildings, mountains,
and other obstructions. For this reason, FM signals often
seem to gradually disappear or fade away as the vehicle
goes behind a building or other obstruction. This is called
ºfade outº.
4. COMPACT DISC PLAYER
Compact Disc (hereafter called ºCDº) Players use a laser beam
pick-up to read the digital signals recorded on the CD and re-
produce analog signals of the music, etc. There are 4.7 in. (12
cm) and 3.2 in. (8 cm) discs in the CD player.
HINT:
Never attempt to disassemble or oil any part of the player unit.
Do not insert any object other than a disc into the magazine.
NOTICE:
CD players use an invisible laser beam which could cause
hazardous radiation exposure. Be sure to operate the play-
er correctly as instructed.
5. Tape Player/Head Cleaning:
MAINTENANCE
(a) Raise the cassette door with your finger.
Next, using a pencil or similar object, push in the guide.
(b) Using a cleaning pen or cotton applicator soaked in clean-
er, clean the head surface, pinch rollers and capstans.

FOR THE TOYOTA DEALER
COLLISION REPAIR INFORMATION
TITLE: WELDING HIGH STRENGTH PAGE 1 of 5
STEEL (H.S.S.)
SECTION: WELDING BULLETIN #27
MODELS: ALL TOYOTA MODELS
DATE: JULY 1988
In today's body shop environment high strength steel (H.S.S.) body parts are frequently
welded during collision damage repairs. Typical uses for H.S.S. are the front cross
member, front body outer pillar, floor side member and door side impact protection beam.
Because H.S.S. is used in these areas of potential high stress, repairs must
be done
properly to maintain the structural integrity of the vehicle.
Two types of H.S.S. are used. Solution hardened H.S.S. is used for door panels, hood
outer panel, etc., while precipitation hardened H.S.S. is used for door impact beams and
bumper reinforcements. It is not necessary to distinguish solid solution hardened steel from
ordinary steels for repair purposes.
The location of H.S.S. parts can be found in the Toyota Repair Manual for Collision
Damage under the Body Panel Construction section. A sample chart from the 1987 Camry
Collision Repair Manual is on page 3 of this bulletin. A list of available Toyota Collision
Repair manuals is on page 4.
REPAIR GUIDELINES
H.S.S. and ordinary steel parts in Toyota vehicles are welded using the same methods.
The following precautions apply:

Use either spot welding or MIG/MAG (shield gas) welding. MIG/MAG (shield
gas) welding should only be done by an experienced body shop person.

Only braze body components previously brazed at the factory and as indicated in
the Toyota Repair Manual for Collision Damage.

Do not use an oxy±acetylene torch
for fusion welding auto bodies. The large
heat affected zone may destroy galvanized coatings and cause excessive panel
distortions. In addition, an oxy±acetylene torch will reduce the strength and
increase the brittleness of H.S.S.

STEREO POWER
AMPLIFIER
RADIO AND PLAY ER
BLOWER MOTOR
CONTROL RELAY
SEAT HEATER RELAY
(
PASSENGER' S SEAT)
SEAT HEATER
(
PASSENGER' S SEAT)
BUCKLE SW RH
DOOR COURTESY SW RH
HIGH BEAM INDICATOR
LIGHT [COMB. METER]
TRACTION CONTROL SW
SHIFT LOCK ECU
ELECTRONICALLY
CONTROLLED
TRANSMISSION
PATTERN SELECT SW
O/D MAIN SWSEAT HEATER SW
DA YTIME RUNNING
LIGHT RELAY (
MAIN) (
EP)
(
GND)
HE ATE R CONTROL SW
CI GARETTE LI GHTER
CL O CK
AU TO AN TENNA
CONTROL RELAY GLOVE BOX LIGHT SW
THEFT DETERRENT
AND DOOR LOCK
CONTROL ECU
PPS ECU
DOOR LOCK CONTROL
SW RH RE MOTE CONTROL
MIRROR AND MIRROR
HE A TE R RH
DOOR LOCK MOTOR AND
DOOR UNL OCK
DE TECTION S W RH DOOR KEY LOCK AND
UNLOCK SW RH IG
IH I24 I24 I23
I23
I 2
I11
I10I21
B 2 B 2 I25
B 2 IL116 IF311
IK11
IF114
I18
I18IF
I14(
E2)
(
VER1)COMBINATION
METER
A/C
AMPLIFIER
W- B
(
*2)W- B
(
*1)
W- B
(
*2)
W- B
(
*1)
W- B
(
*3)
W- B
(
A/T)
W- B
(
*1)
W- B
(
*1) W- B
(
*1)W- B
(
*1)W- B
(
*1) W- B
(
*1)
W- B
(
*1)
W- BW- B
W- B W- BR- L W- B W- B W- B
W- B W- B W- B W- B W- B W- BW- B
W- BW- B
W- B W- B W- B W- B W- B W- B W- B W- B
W- B
W- B BR BR BR
A
A
A
A
A
A A
A
W- B W- BW- B
W- B W- B
W- B W- B W- B
JUNCTION
CONNECTOR J 1
I11 : * 3
I 4 : * 4 (
*1)(
*1) (
*6)
(
GND)
(
GND)ABS ECU
W- BW- B
(
A/T)
(
A/T)
DA TA LI NK
CONNECTOR 3 W- B I 3
I14
BR
W- BW- BW- B (
*5)
COMBINATION METER
TELLTALE LIGHT RH
FUEL SENDERI 8
I 3
IE13
BP11
BR BRBR
BR
BR
BR
BR
W- B
I10 : * 3
I 9 : * 4I18 : * 3
I 4 : * 4
I18 : * 3
I 4 : * 4
I11 : * 3
I 1 : * 4
242
J GROUND POINT

222 22
222 22
112
E 2
EA 15A
HEAD
(
LH- UPR)7. 5A
DRL15A
HEAD
(
RH- UPR)15A
HEAD
(
RH - LW R)15A
HEAD
(
LH- LWR)
HEADLIGH
LO RHHEADLIGHT
LO LH H 4 H 3 R
R- W
R
R
R R- W
R- B R- Y
R- B W- B W- B
W- B
111 11 222 22E 7
E 7
E 2E 2
1 2
1 2
B 1B3
B 2B4A1A5A2
A3
3 2IB1 2
IF1 6
E 2IF1 14
EA EB I E
TO FOG LIGHT
RELAY W- B
W- B
W- BW- B
W- B
W- B
R- WR- L
R- BR- L R
W- B
IB5 13
W- B
R- L R- W R- W R- WR- L
R- B
R- Y
R- W
R- Y
W- B
W- BHIGH BEAM
INDICATOR LIGHT
[COMB. METER] DAYTIME RUNNING
LIGHT RELAY NO. 3 HEADLIGHT
HI LHHEADLIGHT
HI RH
C12 H 1 H 2R- W
R- W
R- W
B D 2 , D 3A
R- B
E 2
2
T
98
HEADLIGHT (CANADA)

15A
HEAD (
RH)
(
USA)
25
6
1
IF2 13 IF1 6IB1 2
IF2 1IF24IF114
IE1 1IE12IE13
BP1 5 BP13BP11 II1 24 II1 19 A 2A 16 A15 B6
A 7A6A3A9A8B8A10 A11 A13
II1 29
SLIP
CRUISE
HIGH BEAM
WATER TEMP.
FUEL
FUEL
TACHO
IJ213
IE EC IFI 3 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
IJ29
EXT
I 4
E10
C 9
P 2
COMBINATION METER FROM HEADLIGHT HI RH
FUEL SENDERIGNITER
ENGINE CONTROL MODULE
CLUTCH START
SW
PARK/NEUTRAL POSITION
SW Y- G
Y- B
BR BRY- B Y- GBR Y- RR- LO W
Y- G
Y- B
BR
B- W B- W
B- W BRBR Y- L (
*3) R- L W- BW
O TO THROTTLE E CU
TO CRUISE CONTROL
ECU
TO DI MME R SW
[COMB. SW]
ENGINE COOLANT TEMP. SENDER
LH
RH TURNB
(
A/T)
B
(
M/T)B- W
(
M/T) R- W
(
*1)
B- W
G- B
G- Y R- W R- W
R- W
G- B
G- YB- WB
B BR
BR
(
*4)
(
*3) (
*1)
BULB
CHECK RELAY
123416FROM TURN SIGNAL SW
[COMB. SW]
1 2
(
*2)
E 4
C
C10 , C11
, C1 2
BA
(
*3)
1I 4
B (
*3)
Y- R (
*4)
(
A/ T)
(
A/T)(
A/T) (
*2)
TACO
F14
2
P
N
1E 19 1E14 1H 11 1H7
7. 5A
ST
1K 4
220
COMBINATION METER