1986 TOYOTA SUPRA relay

57
* 1 : C AN AD A
12
12
12
12
12
E8 E72
2
2
2
2 2
2
2
2
2 1J3 1J8
1J630A DOOR
30A DEFOG
25 13 1H12
1C7 1B2
1J5
1K7
44
IC2544 5
13
2 W±L
P±L
B± Y
B±W
B±O
R
R±WR±W
R±W R±YR R±B R±WR±B W±L
BBB R
(
USA)
R
(
*
1)
W±LY
7. 5A RAD NO. 2
15A CIG
7. 5A ST
7. 5A IGN
15A HEAD(
LH)(
FOR USA)
15A HEAD(
LH± LW R)(
FO R CANADA)
15A HEAD(
RH)(
FOR USA)
15A HEAD(
RH±LWR)(
FO R CANADA)
7. 5A DRL(
FOR CANADA)
15A HEAD(
LH± UP R)
(
F O R C AN AD A)
15A HEAD(
RH±UPR)
(
F O R C AN AD A)TAI LLI G HT
RELAY
10A TAIL 10A PANEL
15A STOP
10A ECU±B 20A WIPER
7. 5A TURN
10A ECU±IG
7. 5A HTR
10A GAUGE
15A SEAT±HTR
(
FOR CANADA)
10A MIR±HTRTO A/C
AMPLIFIERREAR WINDOW
DEFOGGER
RELAY 1
32
4
E7
(
*
1)(
*
1) (
*
1)(
*
1)
(
*
1) (
*
1)
R
(
*
1)
(
USA)
R±G
(
*1) R
(
*
1)RTO LIGHT CONTROL SW
[C O M B. S W ]

58
POWER SOURCE
HEADLIGHT RELAY (FOR USA)
2±1 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
HEADLIGHT RELAY (FOR CANADA)
2±1 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
: CLOSED WITH ENGINE RUNNING AND PARKING BRAKE LEVER RELEASED (PARKING BRAKE SW OFF)
TAILLIGHT RELAY
5±3: CLOSED WITH LIGHT CONTROL SW AT TAIL OR HEAD POSITION
I19 IGNITION SW
7±5 : CLOSED WITH IGNITION KEY AT ACC OR ON POSITION
7±4 : CLOSED WITH IGNITION KEY AT ON OR ST POSITION
2±3 : CLOSED WITH IGNITION KEY AT ON OR ST POSITION
7±8 : CLOSED WITH 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
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
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
E 732ENGINE ROOM MAIN WIREE 832ENGINE ROOM MAIN WIRE
SERVICE HINTS

60
STARTING AND IGNITION (FOR 2JZ±GTE)
7
28
3 AM2 AM1ACC
IG1
ST1
IG2
ST2
30A
AM2 22
21J 6
1J 4
1B 4
221K 4
2 17. 5A
ST
MB 1
A152 31
IB3 8EA1 3IJ29IJ213
I4 E16E16
IF2 13
IF2 10 EA2 1IJ11
IGNITION SW
50A AM1
(
FOR USA)
60A AM1
(
FOR CANADA)
120A
ALT50A
MAIN
BATTERY
STARTERTHEFT DETERRENT
ECU
STARTER
RELAYTO COMBINATION
METERPARK/NEUTRAL
POSITION SW
(
NEUTRAL START
SW)(
A/T) CLUTCH
START SW
(
M/T)P
N
B S2 ,S3A I19
T13 C9 P 2 W
B±W
B±OB±O
B±W
B B±W
B
B
L±OIJ1 2B
(
A/T)
B
(
M/T)
B±W
(
M/T)
B
(
A/T) B±W
(
A/T) B
(
M/T)B±W B±W
BB±W L±OB B
L±OB
B
B
(
A/T)
SRLY 256
5
W±RW
W±RW
IB1 4
11 2
22 1
B
(
A/T)
B
1 2
2A 1
E13 : A/T
E16 : M/T I4
B
B
(
A/T)
(
M/T)(
M/T)
(
A/T)
(
A/T)
(
A/T)
2 2
W

62
STARTING AND IGNITION (FOR 2JZ±GTE)
I19 IGNITION SW
7±8 : CLOSED WITH IGNITION SW AT ST POSITION
2±3 : CLOSED WITH IGNITION SW AT ON OR ST POSITION
P 2 PARK/NEUTRAL POSITION SW (NEUTRAL START SW) (A/T)
6±5 : CLOSED WITH A/T SHIFT LEVER IN P OR N POSITION
C 9 CLUTCH START SW (M/T)
1±2 : CLOSED WITH CLUTCH PEDAL FULLY DEPRESSED
S 2(A), S 3(B) STARTER
POINTS CLOSED WITH PARK/NEUTRAL POSITION SW (NEUTRAL START SW) ON AND IGNITION SW AT ST POSITION (A/T)
POINTS CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION (M/T)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 124I 3B25J 229
C 224I 625N 125 (2JZ±GTE)
C 324I 725P 225 (2JZ±GTE)
C 928I 825S 2A25 (2JZ±GTE)
D 124 (2JZ±GTE)I 925S 3B25 (2JZ±GTE)
E 9B29I1025T1329
E10A29I1125
I 2A25I1929
: 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)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1K20COWL 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)IB336ENGINE 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
E11I 438COWL WIRE
E1332ENGINE WIREI1738ENGINE WIRE
E16
32ENGINE WIRE
SERVICE HINTS

64
STARTING AND IGNITION (FOR 2JZ±GE)
7
7. 5A
ST
30A
AM 2 1B 41J 4
2 2
2
222 1
52 311K 41J 6
B 1
A1 120A
ALT 50A
AM1
50A
MAIN
BATTERY
STARTER
RELAY
6
5 PARK/NEUTRAL
POSITION SW
(
NEUTRAL
START SW) CLUTCH
START SW
M
THEFT DETERRENT
ECU
STARTER IGNITION SW W±R W
B±W
B±OB±W
B±WB±O
B
B
B B
L±OB± W B
W
W±R W±RW
B
B
BB±W
B±W
B±W B B
L± O B
L±OB±W B
B±W
B B B
25(
A/T)(
A/T)
(
M/T)
(
A/T) (
A/T) (
M/T)
(
M/T)
TO COM BI NA TIO N
METER
SRLYP
N IB1 4
EA1 3IJ12IJ 2 9
IF2 13IJ213
IB 2 6 EA3 1
IF2 10 1
11 2
22I19
C9 P2
T13I17
E28 I4 28
3 AM2 AM1ACC
IG 1
ST1
IG 2
ST2
2
1
2A 1I4
B
B B
(
A/T)
E27 : A/T
E28 : M/T
B S2 , S3A(
A/T)
(
A/T)
(
A/T) (
M/T) (
M/T)
(
A/T)
2 2
W

66
STARTING AND IGNITION (FOR 2JZ±GE)
I19 IGNITION SW
7±8 : CLOSED WITH IGNITION SW AT ST POSITION
2±3 : CLOSED WITH IGNITION SW AT ON OR ST POSITION
P 2 PARK/NEUTRAL POSITION SW (NEUTRAL START SW) (A/T)
6±5 : CLOSED WITH A/T SHIFT LEVER IN P OR N POSITION
C 9 CLUTCH START SW
1±2 : CLOSED WITH CLUTCH PEDAL FULLY DEPRESSED
S 2(A), S 3(B) STARTER
POINTS CLOSED WITH PARK/NEUTRAL POSITION SW (NEUTRAL START SW) ON AND IGNITION SW AT ST POSITION (A/T)
POINTS CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION (M/T)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 928I 527S 2A27 (2JZ±GE)
D 126 (2JZ±GE)I1929S 3B27 (2JZ±GE)
D 426J 229T1329
E 929N 127 (2JZ±GE)
I 427P 227 (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)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1K20COWL 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)
EA134 (2JZ±GE)ENGINE 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)
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
EC34 (2JZ±GE)FRONT SIDE OF INTAKE MANIFOLD
ED34 (2JZ±GE)REAR SIDE OF INTAKE MANIFOLD
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E22I 438COWL WIRE
E2734ENGINE WIREI1738ENGINE WIRE
E28
34ENGINE WIRE
I2038COWL WIRE
SERVICE HINTS

69
G 2(A) GENERATOR (ALTERNATOR)
(A) 3±GROUND:13.9±15.1 VOLTS WITH ENGINE RUNNING AT 2000 RPM AND 25°C (77°F)
13.5±14.3 VOLTS WITH ENGINE RUNNING AT 5000 RPM AND 11 5°C (239°F)
(A) 1±GROUND:0±4 VOLTS WITH IGNITION SW AT ON POSITION AND ENGINE NOT RUNNING
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
G1B24 (2JZ±GTE)G2A24 (2JZ±GTE)T 629G 1B26 (2JZ±GE)G 2A26 (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
G1ABLACK
12 X X X3T6 G2
SERVICE HINTS

70
ENGINE CONTROL (FOR 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. (WATER TEMP.) SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. (WATER TEMP.)
AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE, WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP.
(WATER TEMP.) WHICH IS INPUT INTO TERMINAL THW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW (AIR FLOW METER) AND DETECTS THE INTAKE AlR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(3) OXYGEN DENSITY SIGNAL CIRCUIT
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSORS SIDE AND INPUT AS A
CONTROL SIGNAL TO TERMINALS OX1, OX2 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU). 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 (SPEED SENSOR) NO.1 INSTALLED IN THE TRANSMISSION
AND THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION IS IN ªNº AND ªPº OR NOT,
AND THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE. (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU). WITH THE IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE
CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) START±UP POWER SUPPLY IS
APPLIED TO TERMINAL +B OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU) VIA EFI MAIN RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL MODULE (ENGINE
AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW (AIR FLOW METER) AND THE SIGNAL IS INPUT TO TERMINAL VG
OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) 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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS
A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING, THE VOLTAGE IS APPLIED TO THE STARTER MOTOR DURING CRANKING
IS DETECTED AND THE SIGNAL IS INPUT INTO TERMINAL STA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) 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 INTO TERMINALS
KNK1 AND KNK2 AS A CONTROL SIGNAL.
SYSTEM OUTLINE