1997 TOYOTA SUPRA relay

12
12
12
12
12
12
12
12 12
1212
12
12
122
73
4
8 6
E 7
2 2 2
2 2 2 2
2 2 22
2
2
2
2
2
2
2
2
2 2 2 2 IB14
1 3 2 3 4 21
3
5
1
4
2 W- R W- RW
W- R R
B
W- RW
W- L
G
B- Y
B- R B- W
R
R
R- W R- Y
B
B
R- L W W
L- YY B- O B- WG- RW WR L- Y
B
W
(
*1)(
*2) (
*2)(
*2)
(
USA) 120A ALT
20A RAD NO. 1
7. 5A DOME
7. 5A ALT- S
15A HAZ- HORN60A POWER
60A ABS NO. 1
50A HTR
30A FAN
(
*2)
30A EFI NO. 1
30A EFI NO. 2
(
*2)
30A ABS NO. 2
(
*2)
7. 5A TRAC
(
*2)R- WTO DIMMER SW
[COMB. SW]
TO STARTER
FROM PA RK/ NEUTRA L
POSITION SW
(
A/T)
CLUTCH START SW
(
M/T)
TO DAYTIME
RUNNING LIGHT
RELAY (
MAIN) TO GENERATOR
ºBº
IGNITI ON SW I19
HEADLIGHT
RELA Y
STARTER RELAY
DIMMER RELAY
(
DAYTIME RUNNING
LIGHT RELAY NO. 2)
(
*1) 2
1250A AM1 (
US A)
60A AM1 (
*1)
2 2W2
W
TO GENERATOR
ºBº W
WW
(
*1)
(
*1)(
*1)
(
*1)(
*1) W
L- O
L- OTO THEFT
DETERRENT AND
DOOR LOCK
CONTROL ECU 7. 5A OBD- E 7 : * 2
E2 0 : * 3 E 7 : * 2
E20 : * 3
AM2 AM1ACC
IG1
ST1IG2
1J 41B 4
1230A AM22A1
1250A MAIN
15A FOG2B 1
BATTE RY
56
POWER SOURCE

58
POWER SOURCE
HEADLIGHT RELAY (USA)
2-1 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION OR THE DIMMER SW AT FLASH POSITION
HEADLIGHT RELAY (CANADA)
2-1 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION OR THE DIMMER SW AT FLASH POSITION
: CLOSED WITH THE ENGINE RUNNING AND THE PARKING BRAKE LEVER RELEASED (PARKING BRAKE SW
OFF)
TAILLIGHT RELAY
5-3 : CLOSED WITH THE LIGHT CONTROL SW AT TAIL OR HEAD POSITION
I19 IGNITION SW
2-3 : CLOSED WITH THE IGNITION KEY AT ACC OR ON POSITION
2-4 : CLOSED WITH THE IGNITION KEY AT ON OR ST POSITION
7-6 : CLOSED WITH THE IGNITION KEY AT ON OR ST POSITION
7-8 : CLOSED WITH THE IGNITION KEY AT ST POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
I1929
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO.2 (ENGINE COMPARTMENT LEFT)
423R/B NO.4 (LEFT KICK PANEL)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1C20FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
()
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2B22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E732ENGINE ROOM MAIN WIREE2034ENGINE ROOM MAIN WIRE
I1 9
X234
X678
SERVICE HINTS

6
30A
AM2 22
222 1
MB 1
A152 31
IB2 12 EA1 3IJ213
I 4E16 E16
IF2 13
IF2 10 EA2 1IJ11
IGNITION SW
50A
MAIN
BATTERY
STARTERTHEFT DETERRENT
AND DOOR LOCK
CONTROL ECU STARTER
RELAY
TO BULB CHECK RELAY
[COMB. METER]PARK /NEUTRA
POSITION SW
(
A/T) CLUTCH
START SW
(
M/T)
B S 2 , S 3A I19
T13 C 9P 2 B- R B- W
B- O
B- W
B B- W
B
B
L- OIJ1 2B
(
A/ T)
B
(
M/T)
B- WB
(
A/T) B- W
(
A/ T)
B
(
M/T)B- W B- W
BB- W L- OB B
L- OB
B
B
(
A/T)
255
W- R W- R
IB1 4
22
B
(
A/T)
B
E17 : A/T
E16 : M/T I 4
B
B
(
A/T)
(
M/ T)(
M/ T)
(
A/ T)
(
A/T)
(
A/ T)
I20 IJ29
B- W
81J 6
1K 47. 5A
ST
11
2A 1
SRLY
7AM2 IG2
ST2
LP
N6
60
STARTING AND IGNITION (2JZ-GTE)

62
STARTING AND IGNITION (2JZ-GTE)
I19 IGNITION SW
7-8 : CLOSED WITH THE IGNITION SW AT ST POSITION
7-6 : CLOSED WITH THE IGNITION SW AT ON OR ST POSITION
P2 PARK/NEUTRAL POSITION SW (A/T)
6-5 : CLOSED WITH THE A/T SHIFT LEVER IN P OR N POSITION
C9 CLUTCH START SW (M/T)
1-2 : CLOSED WITH THE CLUTCH PEDAL FULLY DEPRESSED
S2 (A), S3 (B) STARTER
POINTS CLOSED WITH THE PARK/NEUTRAL POSITION SW ON AND THE IGNITION SW AT ST POSITION (A/T)
POINTS CLOSED WITH THE CLUTCH START SW ON AND THE IGNITION SW AT ST POSITION (M/T)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C124I3B25J229
C224I625N125 (2JZ-GTE)
C324 (2JZ-GTE)I725P225 (2JZ-GTE)
C928I825S2A25 (2JZ-GTE)
D124 (2JZ-GTE)I925S3B25 (2JZ-GTE)
E9B29I1025T1329
E10A29I1125
I2A25I1929
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 ( ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)IK20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA132(2JZ-GTE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA232ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ138ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EC32 (2JZ-GTE)FRONT SIDE OF INTAKE MANIFOLD
ED32 (2JZ-GTE)REAR SIDE OF INTAKE MANIFOLD
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E11I4
E1632ENGINE WIREI1738COWL WIRE
E17I20
SERVICE HINTS

123
LIG S B
IC REGULATOR
BW
W
B- O Y- G
Y- G
Y
WY
W
BATTERY
GENERATORAAA B 123 1 II1 34 II123
W
W
A G 1 , G 2B FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
EA2 4
EA3 2(
*1)
(
*2)
W
W
W
I14
Y- G Y- G
Y- G FROM
COMBINATION
METERCHARGE WARNING LIGHT
[ TELL TAL E LI GHT RH] T 6 Y- G
TO DAYTIME RUNNING
LIGHT RELAY(
MAIN)
1E 81E1210A
GA UGE 7. 5A
IGN
22
7. 5A
ALT- S 22
11 120A
ALT
2A 1
68
CHARGING*1 : 2JZ- GTE
*2 : 2JZ- GE

69
G2 (A) GENERATOR
(A) 3-GROUND :13.9-15.1 VOLTS WITH THE ENGINE RUNNING AT 2000 RPM AND 25
C (77
F)
13.5-14.3 VOLTS WITH THE ENGINE RUNNING AT 5000 RPM AND 115
C (239
F)
(A) 1-GROUND ;0-4 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE ENGINE NOT RUNNING
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
G1B24 (2JZ-GTE)G2A24 (2JZ-GTE)T629G1B26 (2JZ-GE)G2A26 (2JZ-GE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: 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)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA232ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA334ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I1438INSTRUMENT PANEL WIRE
1
123 B
G 1ABLACK
12 X X X3T 6 G 2
SERVICE HINTS

70
ENGINE CONTROL (2JZ-GTE)
THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE
ENGINE, TRANSMISSION ETC. AN OUTLINE OF THE ENGINE CONTROL IS GIVEN HERE.
1. INPUT SIGNALS
(1) ENGINE COOLANT TEMP. SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. WHICH IS INPUT INTO
TERMINAL THW OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW METER AND DETECTS THE INTAKE AIR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE.
(3) OXYGEN DENSITY SIGNAL CIRCUIT
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSOR SIDE AND
INPUT AS A CONTROL SIGNAL TO TERMINAL OX1, OXS OF THE ENGINE CONTROL MODULE.
(4) RPM SIGNAL CIRCUIT
CRANKSHAFT POSITION IS DETECTED BY THE CRANKSHAFT POSITION SENSOR. CRANKSHAFT POSITION IS
INPUT AS A CONTROL SIGNAL TO TERMINAL NE OF THE ENGINE CONTROL MODULE.
(5) THROTTLE POSITION SIGNAL CIRCUIT
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE AS A CONTROL SIGNAL,
WHICH IS INPUT INTO TERMINAL VTA1 OF THE ENGINE CONTROL MODULE. WHEN THE VALVE IS COMPLETELY
CLOSED, THE CONTROL SIGNAL IS INPUT INTO TERMINAL IDL1.
(6) VEHICLE SPEED CIRCUIT
THE VEHICLE SPEED IS DETECTED BY VEHICLE SPEED SENSOR NO. 1 INSTALLED IN THE TRANSMISSION AND
THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW DETECTS WHETHER THE SHIFT POSITION IS IN Nº AND  Pº OR NOT, AND
THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE.
(8) A/C SW SIGNAL CIRCUIT
THE OPERATING VOLTAGE OF THE A/C MAGNETIC CLUTCH IS DETECTED AND THE SIGNAL IS INPUT INTO
TERMINAL ACMG OF ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE. WITH THE
IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE START-UP POWER SUPPLY IS
APPLIED TO TERMINAL +B OF THE ENGINE CONTROL MODULE VIA EFI MAIN RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL
MODULE.
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW METER AND THE SIGNAL IS INPUT TO TERMINAL
VG OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(11) STOP LIGHT SW SIGNAL CIRCUIT
THE STOP LIGHT SW IS USED TO DETECT WHETHER THE VEHICLE IS BRAKING OR NOT AND THE SIGNAL IS
INPUT INTO TERMINAL STP OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING
CRANKING IS DETECTED AND THE SIGNAL IS INPUT IN TERMINAL STA OF THE ENGINE CONTROL MODULE AS
A CONTROL SIGNAL.
(13) ENGINE KNOCK SIGNAL CIRCUIT
ENGINE KNOCKING IS DETECTED BY KNOCK SENSOR FRONT AND REAR SIDE AND THE SIGNAL IS INPUT
TERMINALS KNK1 AND KNK2 AS A CONTROL SIGNAL.
SYSTEM OUTLINE

7
8 6
30A
EFI
NO. 230A
EFI
NO. 1
52 31
52 31
6
5
M 4
BI EB22
22
22 22
22
IC2 11 IB1 5 IB1 4
BP1 6 IC2 10 IC212 IJ213
BP12EA14
E1 6
16
B V- WG B- RB- Y
B- RB- Y
B- W
W- B
G
W- BB- W
B- W
GL
L- RV- W W- B W- B
W- BW- B LB- W B- W B- W
L LB- R B- W W- R W- R B
B- Y
IGNITION SW
PARK/NEUTRAL POSITION SW (
A/T)
I19
P 2
FROM POWER SOURCE SYS TEM (
SEE PAGE 56)
EFI NO. 2
RELAY
EFI MAIN
RELAY
BATTERYFUEL PUMP
ECU
FUEL PUMP F14F15
B
22 11
E 7
B- W
E 7
B- R
B- R B- R B- R
B
TO STARTER
RELAYE16 : M/T
E17 : A/T
(
A/T)
B- W
I 4B
(
A/ T)(
A/T)
2 1
IJ1 2
B B- W B- W
B(
M/T) (
M/T) (
M/T)
(
A/ T)(
A/T)
(
A/T)
CLUTCH STA RT SW (
M/T) C 9
P
N
85 2EFPC FP +B DI
AM2 IG2
ST2
7. 5A
ST
1K 41J 6
2
30A AM2
2A 11 2
5
W- B
72
ENGINE CONTROL (2JZ-GTE)