1997 TOYOTA SUPRA turn signal

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

228
RADIATOR FAN AND AUTOMATIC
1. HEATER BLOWER OPERATION
MANUAL BLOWER OPERATION
WHEN THE BLOWER CONTROL SW IS SET TO ANY BLOWER SPEEDS, THE A/C AMPLIFIER OPERATES AND THE
CURRENT TO DRIVE THE BLOWER MOTOR FLOWS FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI
OF THE BLOWER MOTOR CONTROL RELAY. THE CURRENT ACTIVATES THE RELAY AND THE VOLTAGE APPLIED TO
TERMINAL +B OF THE BLOWER MOTOR CONTROL RELAY IS OUTPUT AT TERMINAL M+ AS THE VOLTAGE FOR THE
SELECTED BLOWER SPEED. THE CURRENT THEN FLOWS FROM TERMINAL M+ OF THE BLOWER MOTOR
CONTROL RELAY TO TERMINAL 2  TERMINAL 1 TERMINAL M- OF THE BLOWER MOTOR CONTROL RELAY 
TERMINAL GND GROUND, AND THE BLOWER MOTOR OPERATES AT THE BLOWER SPEED SELECTED.
AUTO FUNCTION
WHEN THE AUTO SW IS TURNED ON, THE A/C AMPLIFIER CALCULATES THE REQUIRED VENT TEMPERATURE BASE
ON THE SET TEMPERATURE AND INPUT FROM EACH SENSOR. THEN TERMINAL BLW OF THE A/C AMPLIFIER
INPUTS CURRENT TO TERMINAL SI OF THE BLOWER MOTOR CONTROL RELAY IN CONFORMITY WITH THE
REQUIRED VENT OUTPUT. THIS CURRENT ACTIVATES THE BLOWER MOTOR CONTROL RELAY SO THAT CURRENT
FLOWS FROM TERMINAL M+ OF THE BLOWER MOTOR CONTROL RELAY TERMINAL 2 OF THE BLOWER MOTOR
TERMINAL 1 TERMINAL M- OF THE BLOWER MOTOR CONTROL RELAY TERMINAL GND GROUND,
ACTIVATING THE BLOWER MOTOR. THE BLOWER MOTOR THEN OPERATES AT DIFFERENT STEPS IN CONFORMITY
WITH VARIABLE CURRENT FLOW OUTPUT FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI OF HE
BLOWER MOTOR CONTROL RELAY.
2. OPERATION OF AIR INLET CONTROL SERVO MOTOR
(SWITCHING FROM FRESH TO RECIRC)
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF THE AIR INLET
CONTROL SERVO MOTOR TERMINAL 5 TERMINAL AIR OF THE A/C AMPLIFIER TERMINAL GND 
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT RECIRC POSITION.
(SWITCHING FROM RECIRC TO FRESH)
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF THE AIR INLET
CONTROL SERVO MOTOR TERMINAL 3 TERMINAL AIF OF THE A/C AMPLIFIER TERMINAL GND 
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT FRESH POSITION.
3. OPERATION OF AIR VENT MODE CONTROL SERVO MOTOR
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL IG OF THE A/C
AMPLIFIER
(SWITCHING FROM DEF TO FACE)
THE CURRENT FROM TERMINAL AOF OF THE A/C AMPLIFIER TERMINAL 1 OF THE AIR VENT MODE CONTROL
SERVO MOTOR TERMINAL 2 TERMINAL AOD OF THE A/C AMPLIFIER TERMINAL GND GROUND. THE
MOTOR ROTATES AND THE DAMPER MOVES TO FACE SIDE. WHEN THE DAMPER OPERATES WITH THE A/C SW AT
FACE POSITION, THE DAMPER POSITION SIGNAL IS INPUT FROM TERMINAL 3 OF THE SERVO MOTOR TO THE
TERMINAL TP0 OF THE A/C AMPLIFIER. AS A RESULT, CURRENT TO THE SERVO MOTOR CIRCUIT IS CUT OFF BY
THE AMPLIFIER, SO THE DAMPER STOPS AT THAT POSITION.
(SWITCHING FROM FACE TO DEF)
THE CURRENT FLOWS FROM TERMINAL AOD OF THE A/C AMPLIFIER TERMINAL 2 OF THE AIR VENT MODE
CONTROL SERVO MOTOR TERMINAL 1 TERMINAL AOF OF THA A/C AMPLIFIER TERMINAL GND 
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT THAT POSITION.
4. OPERATION OF AIR MIX CONTROL SERVO MOTOR
WHEN THE TEMPERATURE SW IS TURNED TO THE COOLº SIDE, THE CURRENT FLOWS FROM TERMINAL AMC OF
THE A/C AMPLIFIER TERMINAL 1 OF THE AIR MIX CONTROL SERVO MOTOR MOTOR TERMINAL 2 
TERMINAL AMH OF THE A/C AMPLIFIER TERMINAL GND GROUND AND THE MOTOR ROTATES. THE
DAMPER OPENING ANGLE AT THIS TIME IS INPUT FROM TERMINAL 3 OF SERVO MOTOR TO TERMINAL TP OF THE
A/C CONTROL ASSEMBLY, THIS IS USED TO DETERMINE THE DAMPER STOP POSITION AND MAINTAIN THE SET
TEMPERATURE.
WHEN THE TEMPERATURE CONTROL SW IS TURNED TO THE WARMº SIDE, THE CURRENT FLOWS FROM
TERMINAL AMH OF THE A/C AMPLIFIER TERMINAL 2 OF THE AIR MIX CONTROL SERVO MOTOR MOTOR 
TERMINAL 1 TERMINAL AMC OF THE A/C AMPLIFIER, ROTATING THE MOTOR IN REVERSE AND SWITCHING
THE DAMPER FROM COOL TO WARM SIDE.
SYSTEM OUTLINE

229
AIR CONDITIONING
5. AIR CONDITIONING OPERATION
THE A/C AMPLIFIER RECEIVES VARIOUS SIGNALS, I.E., THE ENGINE RPM FROM THE IGNITER, OUTLET
TEMPERATURE SIGNAL FROM THE A/C THERMISTOR, COOLANT TEMPERATURE FROM THE ENGINE COOLANT
TEMP. SENSOR AND THE LOCK SIGNAL FROM THE A/C COMPRESSOR, ETC.
WHEN THE ENGINE IS STARTED AND THE A/C SW (HEATER CONTROL SW) IS ON, A SIGNAL IS INPUT TO THE A/C
AMPLIFIER. AS A RESULT, THE GROUND CIRCUIT IN A/C AMPLIFIER IS CLOSED AND CURRENT FLOWS FROM HTR
FUSE TO TERMINAL 1 OF THE A/C MAGNETIC CLUTCH RELAY  TERMINAL 2 TERMINAL ACMG OF THE ENGINE
CONTROL MODULE TERMINAL A/C TERMINAL MGC OF THE A/C AMPLIFIER TERMINAL GND 
GROUND, TURNING THE RELAY ON, SO THAT THE A/C MAGNETIC CLUTCH IS ON AND THE A/C AMPLIFIER
OPERATES.
AT THE SAME TIME, THE ENGINE CONTROL MODULE DETECTS THE MAGNETIC CLUTCH IS ON AND THE A/C
AMPLIFIER IS OPERATING AND OPENS DIRECTION TO AVOID LOWERING THE ENGINE RPM DURING A/C
OPERATING.
WHEN ANY OF THE FOLLOWING SIGNALS ARE INPUT TO THE A/C AMPLIFIER, THE A/C AMPLIFIER OPERATES TO
TURN OFF THE AIR CONDITIONING.
*ENGINE RPM SIGNAL IS HIGH.
*COOLANT TEMP. SIGNAL IS HIGH.
*A SIGNAL THAT THE TEMPERATURE AT THE AIR OUTLET IS LOW.
*A SIGNAL THAT THERE IS A LARGE DIFFERENCE BETWEEN ENGINE SPEED AND COMPRESSOR SPEED.
*A SIGNAL THAT THE REFRIGERANT PRESSURE IS ABNORMALLY HIGH OR LOW.

1
234
9 SUPRA
2AC C
IG1 AM1 4
221J 5
1J 4
12 IF1 17 IF11E 14 1E19 1 A4 4IF1 3IB1
7
1H
11
1H3
1C
7
1A
1C 4
IE4 44 2A
BI BJ EB1 22
22
16 IB2
10
2 1
EA IH15 B 6 A
7A 1B 41E 7 I19
IGNITION SW
H10
HAZ ARD
SW50A AM1(
US A)
60A AM1(
Cana da)
120 A A LT
15A
HA Z- H ORN
7. 5A
TU RN
B1 F TB TR B2 TL
OFF
ON
BAT TERY
Lef t kic k
panelRigh t kic k
pan el Front side
of left
fender Lower
back
panel
cent er Le ft quarter
pi lla r
R 9
REA R TURN SIGNAL
LI GHT LH
[REAR COMB. LI GHT LH] R1 0
RE AR TUR N SIGNA L
LIGHT RH
[ REAR CO MB . L IGH T R H]F 7
FRONT TURN SIGNAL
LIGHT L H F 8
FRONT TURN SIGNAL
LIGHT RH TURN SIGN AL
I NDICATOR L IGHT
[COMB. METER]
J 1
JUNC TION
CO NNE CTORH 8
HORN LHH 9
HOR N RHC13
HOR N S W
[COMB . SW]To Theft Deterr ent
an d Door Lock Control
ECU< 14- 4>
C1 0 A , C1 2 B
HORN
REL AYL- R
L- BL- R L - R
W- B W- B L- B L- B
L- B
G- Y
G- B
W- B W- B W- BW- B W- B
W- B W- B
G- B G- Y G- B G- Y
W- RR- B R- B G- Y G- B G- B
G- Y
B G- RW
W W
W W WL- R G- Y
G- B G- B
G- Y
G- Y
W- B
W- B R- B W- R
R- B WW
B- Y
A 6 6 10 8
5 8 1
RH
LHTB TR TL
21 2
2 22
31
55 5 6 9 7
1
1 1
3
A11 BL
E
W- B
13 9 8 7 6 5 4 3 2 1 10111216 11 10 9 8 5 4 3 2 1 12131467 15 A C10 BL UE BC1 2 TURN SIGNA L INDICA TOR LI GHT
[COMB. METER]
TUR N
SI GNAL
FLA SHERC13
TURN SI GNAL SW
[COMB. SW]
LH RH
Fron t side o f
r igh t fe nder 12 2
WP ower Source Turn Signal and Hazard W arning Light Horn
W
K OVERALL ELECTRICAL WIRING DIAGRAM

5
678
26 SUPRA(
Cont' d)
11B 4B 14A 9B 13A 16A 6A 2A 3A 15A 6B 1C 4C 10C 6C 7C 8C 11C 12B 13B
3C 13 C 7B 12 C 2C 5A 1A 10B1B2B 5B 8A 9A 8B 10A 11A13 IF2
33 II1 24 II1 19 II1
5 BP1 3 B P1 1 B P 1
2 1
IF1
EB IH 14 IB2 1IE1 2IE1 3 IE115 I F1 29 I I1
EC
See Illumination
Sy stem< 8- 4>
See Turn Signal
and Haza rd War ning
Light Sys tem< 9- 3>
See Headlight
Sys tem< 5- 3> < 6- 4>
See Cr uise Co ntrol
Sys te m< 17- 2>To Rheostat< 8- 4> L
2
D
N
R
P
MA NU
O/D OFF
TURN RH
TURN LH
HIGH B EAM
SN OW
CRUISE
BRAKE
SPE EDFUEL FUEL TACHO MA ST ER
Fr om Engine Cont rol Mo dule
<3- 7>Fro m Ignite r< 2- 4>
DELAYBUL B
CHE CK
REL AY
E 7
ENGINE OIL
L EV EL SEN SOR
E 4
EN GI NE COO LANT
TEMP. SENDERF14
F UEL SEND ER
From Daytime Running
Light Relay(
Main)
<6- 1>P 5
P ARKING BRAK E
SWJ 1
JUNCTION
CO NNECT OR
B 2
BR AKE FL UID LE VEL
WARNIN G SW
BR- WW- B
BR - W
B B- W
B- W(
*2)
B- WW- B W- B
W- B R- W(
*1)
BR - W(
*2)
R- W
BR- W
B- W
BRBR
G BR Y- R Y- GY- BBR BR
Y- B
Y- G Y- GY- BBR
Y- L(
*1)
Y- R(
*2)
GBRBR
R- GR- Y
L- R L- W Y- GY
B- W Y
L- W
L- R
R
R- G
R- YB- W(
Ca nada)
B- W(Ca nada)
BR- WBR - W B- W( Canada)
BR- W
BR- WDIODE
(* 2) (
USA * 1)
(USA)
(
Can ada)
(
Canada)(
US A) (
US A) (
*1)
112
ILLUMINATION
*1 : 2JZ- GTE
*2 : 2JZ- GE
WATER
TEMP .
A A 123 COMB IN ATI O N ME TER C10 B , C1 1 C , C1 2 A
Front side of
intake manifoldLeft kic k pa ne lRight kick pa nel Front side of
le ft fender
G- O
A
1
2 4 4
Combination M eter
A
B
C
D
E
F
To G e ne r a t o r
<1- 4
B- W(
*1)
From A/C Amplifier
<27- 5>
From Dayt ime Running
Lig ht Rela y(
Mai n)
<6- 2>
SLI P
7A
See Tra ction Cont rol
System< 20- 2>
See Electronically Controlled
Transmission and A/T Indicator
System <15-6><16-6>
From Park/Neutral Position
SW (A/T) <1-3>
From Clutch Start SW (M/T)
<1-3>
See Electronically Controlled
Transmission and A/T Indicator
System <15-6><16-6>
K

IG04X-02
CHECK POWER SUPPLY TO IGNITION COIL AND
IGNITER
SPARK TEST
Replace camshaft position sensor.
CHECK RESISTANCE OF IGNITION COIL (See step 3)
1. Turn ignition switch to ON.
2. Check that there is battery positive voltage at ignition coil positive
CHECK CONNECTION OF IGNITION COIL AND IGNITER
Resistance: Cold Hot
Primary 0.68 - 0.98 W
CHECK RESISTANCE OF CAMSHAFT POSITION
Resistance:
ColdHot
835 - 1,400 W1,060 - 1,645 W
CHECK IGT SIGNAL FROM ECM
(See page DI-252)
TRY ANOTHER IGNITER
Replace ignition coil. Connect securely.
Check wiring between ignition switch
to ignition coil and igniter.
Check wiring between ECM and igniter,
and then try another ECM.
NO
OK
OK
OK
OKBAD
BAD
BAD
BAD
BAD
SENSOR (See step 4)0.54 - 0.84 W
(+) terminal.
CHECK RESISTANCE OF CRANKSHAFT POSITION
Resistance:Cold Hot
1,630 - 2,740 W2,065 - 3,225 W SENSOR (See step 5)
BADReplace crankshaft position sensor. OK
- IGNITION (2JZ-GTE)IGNITION SYSTEM
IG-1
1495 Author
: Date
:
1997 SUPRA (RM502U)
IGNITION SYSTEM
ON-VEHICLE INSPECTION
NOTICE:
ºColdº and ºHotº in these sentences express the tempera-
ture of the coils themselves. ºColdº is from -10°C (14°F) to
50°C (122°F) and ºHotº is from 50°C (122°F) to 100°C
(212°F).
1. INSPECT IGNITER AND SPARK TEST
Check that the spark occurs.
(1) Remove the ignition coil. (See page IG-6)
(2) Remove the spark plug.
(3) Install the spark plug to the ignition coil, and connect
the ignition coil connecter.
(4) Ground the spark plug.
(5) Check if spark occurs while engine is being
cranked.
NOTICE:
To prevent excess fuel being injected from the injectors
during this test, do not crank the engine for more than 5 -
10 seconds at a time.
If a spark does not occur, do the test as follows:

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.

RS0OL-01
AB0250Spiral Cable
R06853
RS-2
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
1941 Author
: Date
:
1997 SUPRA (RM502U)
OPERATION
1. STEERING WHEEL PAD (with AIRBAG)
The inflater and bag of the SRS are stored in the steering wheel
pad and cannot be disassembled. The inflater contains a squib,
igniter charge, gas generant, etc., and inflates the bag when
instructed by the airbag sensor assembly.
2. SPIRAL CABLE (in COMBINATION SWITCH)
A spiral cable is used as an electrical joint from the vehicle body
side to the steering wheel.
3. FRONT PASSENGER AIRBAG ASSEMBLY
The inflater and bag of the SRS are stored in the front passen-
ger airbag assembly and cannot be disassembled. The inflater
contains a squib, igniter charge and gas generant, etc., and in-
flates the bag when instructed by the airbag sensor assembly.
4. SRS WARNING LIGHT
The SRS warning light is located on the combination meter. It
goes on to alert the driver of trouble in the system when a mal-
function is detected in the airbag sensor assembly. In normal
operation conditions when the ignition switch is turned to the
ACC or ON position, the light goes on for about 6 seconds and
then goes off.
5. AIRBAG SENSOR ASSEMBLY
The airbag sensor assembly is mounted on the floor inside the
lower center finish panel. The airbag sensor assembly consists
of an airbag sensor, safing sensor, diagnosis circuit and ignition
control, drive circuit, etc. It receives signals from the airbag sen-
sor and judges whether the SRS must be activated or not.