TOYOTA SUPRA 1986 Service Repair Manual

72
ENGINE CONTROL (FOR 2JZ±GTE)
7
28
3 AM2 AM1ACC
IG1
ST1
IG2
7. 5A
ST30A
EFI
NO. 230A
EFI
NO. 1
52 31
52 31
P
N6
5
M
5 4
BI EB22
1K 4
22
22 1B 41J 4
2222
22 1J 6
IC2 11 IB1 5
IJ1 2 IB1 4
BP1 6 IC2 10 IC212 IJ 213
BP12EA14
2 1E16E9
B6 85 2 16
EFPC FP
B V±WL±RG B±RGR B±R B±WB±Y
B±W
W±B
G
W±B BB±O
B±Y
G L±O
L±R L±RV±W W±B
W±B W±B
W±BW±B L
B±R B±RB±Y B±W B±W
L±O L±OB B±W B
BB±W
B±O W±RW W
W±R B
B±O
+B DI IGNITION SW
CLUTCH
START SW
PARK/NEUTRAL POSITION SW
(
NEUTRAL START SW)
C9 I19
P2
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
EFI NO. 2
RELAY
EFI MAIN
RE LA Y 120A ALT
30A AM250A AM1
(
FOR USA)
60A AM1
(
FOR CANADA)
BATTERYFUEL PUMP
ECU
FUEL PUMP F14F15
2A 11 1
1 22 2I4
B
(
M/T)
(
A/T)22 11
E7
B±Y
E7
B±R
B±R B±R B±R
B
TO STARTER
RE LAYE16 : M/T
E13 : A/T
(
M/T)(
M/T)
(
A/T) (
A/T)
(
A/T)
(
A/T)
2 2
W

73
* 1 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
7. 5A
IGN
1E 81J 3
II1 13
IJ18 EA22 EA25
EA18
E15 E14 E14 I20
IC27
IJ14 IJ112IJ19
1 2
1 2
1 2
1 2
1 2
1 2
1 2 A 24 B76 A33 A1B20 B19 B18 B17 B16 B15
A 21 A22 B77 B74 B35 B33 B34 B32 234876
52 4613 1
DI FPC STA ISC1 ISC3 ISC2 ISC4B±R B±R
B±R
B±R
L±R B±R B± R V± WL±RG
B B±RGR B±R B± WB±Y B±O
B±RGR B± RB±O B±O B±O
G
L±R
V±WB±R
B±R
B±R B±R
B±R
B±O B±O B± O B±OB±Y B±WGR
R±L
R±Y
R±G
R±W
R
R±BL
BR
R
G
B±Y
WB±O G
V±W
B
V
V± Y
G± O
G± W
R±G B±R B±R B±R B±RB
#10 #20 #30 #40 #50 #60
#60 #50 #40 #30 #20 #10 IGSW BATT NSW M±REL+BSFI RESISTOR
(
EFI RESISTOR)
INJECTOR NO. 1
S1
I12
INJECTOR NO. 2 I13
INJECTOR NO. 3 I14
INJECTOR NO. 4 I15
INJECTOR NO. 5 I16
INJECTOR NO. 6 I17 V3
I1VSV(
FOR EVAP)
IDLE AIR CONTROL VALVE
(
ISC VALVE)
ENGINE CONTROL MODULE(
*1) A E9 , E10B
(
A/T)
A 31
E12
B±R
+B
B 75
1 2
V2
VSV(
FOR EGR)
B±R
EGR
B±R
P
EVAP (
A/T)

74
ENGINE CONTROL (FOR 2JZ±GTE)
2 1
2 1
E16 E16 E15
B 40 B38 B45 B66 B28 B65 B62 32 5123
1E2 PIM VC B±R B±R
BR±B
L±R BR ±B
W
BR
R±L
BR
B±R
B±R
L±R
B± Y BR ±BBR Y±RP±L G±RG± B
B± R B± R
BR±B
B±Y
L±R BR±B
VSV1 VSV3 THA VG E21 E2 PM1TURBO PRESSURE SENSOR
MASS AIR FLOW
(
AIR FLOW METER) M1T1 4
ENGINE CONTROL MODULE
(
*
1)
V4
VSV(
FOR EXHAUST
BYPASS VALVE)
A E9 ,E10B
V7
VSV(
FOR INTAKE AIR
CONTROL VALVE)
E10E10
B±R
4 THA VG E2 E2 B±R
B±R
B±R
B
B 47 B72 B71 B48 B73 B60 B39
1 2
1 2
1 2
E10 E13 E10I17
E13I17
IJ1 20IC1 12 IC19IC110
IC1 4IJ2 5IJ214 IJ24
24
4
B±R
B±R
L±R
B±RR±L
BR
B±R B±R B±RBR +B E
E1
G± Y L±W W±LW B± L BR±W
R±L
R±L R±L BR±W
R±L BR±W B± R B±R B±R
B±R
B±R
B±RB±R
B±R
B±R W
21 313 OX2 HT2 HT1 OX1 FPU PMC VSV2
(
SHIELDED) (
SHIELDED)
(
SHI ELD ED) (
SHIELDED) (
SHI ELD ED)
(
SHIELDED) +B HT OXHT OX
HEATED OXYGEN
SENSOR(
SUB)
HEATED OXYGEN
SENSOR(
MAIN)
H11
H5
(
SHIELDED)
VSV(
FOR FUEL
PRESSURE UP)
VSV(
FOR WASTE
GATE VALVE)
VSV(
FOR EXHAUST
GAS CONTROL VALVE) V6
V8
V5
11B 50 B49 KNK1 KNK2
W W (
SHI ELD ED)
KNOCK SENSOR
(
ON REAR SIDE) KNOCK SENSOR
(
ON FRONT SIDE)
K2
(
SHI ELD ED) K1
(
SHIELDED)

75
*
1 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
2 1
2 1
2 1
E14E16 E16 E16 E16
E16E16
B 46 B 24 B 44 B 63 B 42 B 41 B43 B64
B 27 B 7 B 5 B 25 B 6 B 26 1234 4321
12 13 A A A
A
A
13 8 4
15
19 A A A
A
A
+B FPE1 G1 G1± G2 G2± NE± NE
B LG Y±L L±R BR±BBR±B BR±B BR±B
GR±R BR±B
L±R
L±R B±R
B±RBR R±LBRWR±L
L±RBR
WL±R
Y
R
Y±L
GR±R
L±Y
O
BR±YBR±B BR±BBR±B GR±RY±L BR±BRY
OX2 OX1TE1 VF1 VCC VTA1 IDL1 VTA2 IDL2 THW OIL THG
(
SHIELDED)(
SHIELDED)
(
SHIELDED) (
SHIELDED)
(
SH IELD ED) (
SHIELDED)
E1 A5 E3
EGR GAS TEMP. SENSOR A/T FLUID TEMP. SENSOR ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
D1
DATA LINK CONNECTOR 1
(
CHECK CONNECTOR)IG± ENGINE CONTROL MODULE(
*1) A E9 ,E10B
TO TRACTION
ECUL±R
THROTTLE POSITION
SENSOR T2
SUB THROTTLE
POSITION SENSOR S5
BRE13
B±R
JUNCTION
CONNECTOR J2
BRI17
2 1
2 112 (
SHIELDED)
(
SHIELDED)
(
SHIELDED)
BRL B±WW
B±R B±RBR L
CAMSHAFT POSITION
SENSOR NO. 1
CAMSHAFT POSITION
SENSOR NO. 2CRANKSHAFT POSITION
SENSOR C1
C2 C3 O
O
BR
BR
BR E16R
TO TRACTION
ECU
(
A/T)(
A/T)
A 16II1 29
B±W B±W
TACO
FROM COMBINATION
METER

10A
MIR±HTR10A
PANEL15A
STOP
1 2 IH 41E61I10
IF1 3
II1 32II1EA1
IJ2IJ1
IJ2IJ1 11IJ1 6
A 15 A34 A23 A12 A11 A 38 A27 A26 A14 A13A 4A17
A 20A 19 B 29 B57 B56 B55 B54 B53 B52 B58 A6A2 TE1TE2 VF1 IGT1 IGT2 IGT3 IGT4 I GT5 I GT6 I GF W SP1ELS A/C ACMG OD1 ABS NEO EFI+ EFI± TRC+ TRC±STP TT
E16 I17A 1A2A3A9A8A7B3
B 1TACHI GT1 I GT2 I GT3 I GT4 IGT5 IGT6 I GF
Y± L
LG
L±BP LG P±G
Y±LBR
Y±L
LG
B
Y± L
P±GLG
R± W
B±O
GR±B
GR±G
P±B
L±O
R±Y
L±B
P B
L±R
L±R
W±G
BR±B
Y±RP±L
B
W
O
W± RP±L
Y±R BR±BW±GL±R R± Y R± Y
G±OL±R
G±W G±W
GR± R FROM POWER SOURCE SYSTEM(
SEEPAGE56)
W
ENGINE CONTROL MODULE
(
*1)A E9 ,E10B TO TRACTI ON ECU
TO ABS AND
TRACTI ON ECU TO CRUISE
CONTROL ECU TO A/ C
MAGNETIC
CLUTCH
RELAY TO A/ C
AMPLIFIERDIODE
(
FOR I DLE±UP) D8
13
IGNITER 2
312
1114
2
GR±RS11
STOP LI GHT SW
A I2 ,I3B I11
BR
BR
BRI17
I16 IC1 8
IJ1 18B 69 B80 B79 E1 E01 E02
ED I17
BR BR BR BR BR
BR BR BR
BR
BR
BR
BRBR
(
A/T)
(
A/T)(
A/T) (
A/T)
76
ENGINE CONTROL (FOR 2JZ±GTE)

77
* 1 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
I14 10A
GAUGE
I14
I5
II1 2II123 II18
IJ1 13 IJ1 5 IJ1 171E 12
II1 15 II111 IF173 2
1 3
IF ENG TE 1 TE2 E1W TT
2 15
67
7 1 2 38 5L±BL±RY
Y±L
LG
P BR GR±R
L±BBR
PL±B
P
BR
L±R
Y
RYY Y
Y
L±B LG P±G
Y±L
V10
VEHICLE SPEED SENSOR
(
SPEED SENSOR)
NO. 1
(
FOR COMBI NA TI ON M ETER) ODO AND
TRIP
TELLTALE LIGHT RHMALFUNCTION INDICATOR LAMP
(
CHECK ENGINE WARNING LIGHT)
[TELLTALE LIGHT LH] T5
T6
FROM POWER SOURCESYSTEM(
SEE PAGE 56)
L±B
DATA LINK
CONNECTOR 2
(
TDCL) D5I14I14
A 11 A10 B11 A 9
L±R
Y Y
R
BR
Y
L±R
SPEEDOMETER
[COMB. METER]B C10 , C12A
P±G
L±B
BR
(
A/T)
I8

78
ENGINE CONTROL (FOR 2JZ±GTE)
EFI MAIN RELAY
(2) 3± (2) 5 : CLOSED WITH IGNITION SW AT ON POSITION
EFI NO. 2 RELAY
(2) 3± (2) 5 : CLOSED WITH IGNITION SW AT ON POSITION
E 3 ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR)
1± 2:10±20 K (±20°C, ±4°F)
4± 7 K ( 0°C, 32°F)
2± 3 K (20°C, 68°F)
0.9±1.3 K (40°C, 104°F)
0.4±0.7 K (60°C, 140°F)
0.2±0.4 K (80°C, 176°F)
I 1 IDLE AIR CONTROL VALVE (ISC VALVE)
1, 3± 2: APPROX. 10±30 
4, 6± 5: APPROX. 10±30 
I12, I13, I14, I15, I16, I17 INJECTOR
1± 2: APPROX. 13±8 
T 2 THROTTLE POSITION SENSOR
1± 4: APPROX. 4±9 K
1± 3:3.3± 10.0 K WITH THROTTLE VALVE FULLY OPENED POSITION
0.2± 0.8 K WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0 MM (0 IN.)
1± 2:0±2.3 K WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.45 MM (0.0177 IN.)
INFINITY WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.55 MM (0.0216 IN.)
E 9(B), E10(A) ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU)
(VOLTAGE AT ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) WIRING CONNECTORS)
BATT±E1 : ALWAYS 9±14 VOLTS
IGSW±E1 : 9±14 VOLTS WITH IGNITION SW ON
M±REL±E1 : 9±14 VOLTS WITH IGNITION SW ON
+B±E1 : 9±14 VOLTS WITH IGNITION SW ON
IDL1±E2 : 9±14 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY OPEN
:0 ±1.5 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
VTA1±E2 :0.3± 0.8 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
:3.2±4.9 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE OPEN
#10, #20, #30±E01, E02 : PULSE GENERATION (ENGINE IDLING)
#40, #50, #60±E01, E02 : PULSE GENERATION (ENGINE IDLING)
THA±E2 : 0.5±3.4 VOLTS WITH IGNITION SW ON AND INTAKE AIR TEMP. 20°C (68°F)
THW±E2 : 0.2±1.0 VOLTS WITH IGNITION SW ON AND COOLANT TEMP. 80°C (176°F)
STA±E1 : 6±14 VOLTS WITH ENGINE CRANKING
ISC1, ISC2, ISC3, ISC4±E1 : PULSE GENERATION (ENGINE IDLING)
W±E1 :9±14 VOLTS WITH ENGINE IDLING
IGF±E1 : PULSE GENERATION (ENGINE IDLING)
NSW±E1 :0±3 VOLTS WITH IGNITION SW ON AND SHIFT LEVER P OR N POSITION
9±14 VOLTS WITH IGNITION SW ON AND SHIFT LEVER EXCEPT P OR N POSITION
SP1 : PULSE GENERATION
TE1, TE2±E1 :9±14 VOLTS WITH IGNITION SW ON
A/C±E1 :0±1.5 VOLTS WITH IGNITION SW ON AND A/C OFF
7.5±14 VOLTS WITH IGNITION SW ON AND A/C ON
ELS±E1 : 9±14 VOLTS WITH TAILLIGHT ON, DEFOGGER ON
0±1.5 VOLTS WITH TAILLIGHT OFF, DEFOGGER OFF
STP±E1 :7.5±14 VOLTS WITH STOP LIGHT SW ON (BRAKE PEDAL DEPRESSED)
0±1.5 VOLTS WITH STOP LIGHT SW OFF
(RESISTANCE OF ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) WIRING CONNECTORS)
IDL1±E2 : INFINITY WITH THROTTLE VALVE OPEN
:0±2.3 KWITH THROTTLE VALVE FULLY CLOSED
VTA1±E2 :3.3 K10.0KWITH THROTTLE VALVE FULLY OPEN
:200  ±800  WITH THROTTLE VALVE FULLY CLOSED
VCC±E2 : 4 K±9 K
THA±E2 : 2 K±3 KWITH INTAKE AIR TEMP. 20°C (68°F)
THW±E2 : 200 ±400  WITH COOLANT TEMP. 80°C (176°F)
ISC1, ISC2, ISC3, ISC4± +B :10±30 
#10, #20, #30, #40, #50, #60± +B : 13.2 ±14.2 
SERVICE HINTS

79
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 524 (2JZ±GTE)H 524P 225 (2JZ±GTE)
C 124H1129S 125
C 224I 125 (2JZ±GTE)S 525
C 324I 2B25S1129
C 928I 3A25T 225 (2JZ±GTE)
C10A28I1225 (2JZ±GTE)T 529
C12B28I1325 (2JZ±GTE)T 629
D 124 (2JZ±GTE)I1425 (2JZ±GTE)T1425
D 528I1525 (2JZ±GTE)V 225 (2JZ±GTE)
D 828I1625 (2JZ±GTE)V 325 (2JZ±GTE)
E 124 (2JZ±GTE)I1725 (2JZ±GTE)V 425
E 324 (2JZ±GTE)I1929V 525
E 9B29J 229V 625 (2JZ±GTE)
E10A29K 125 (2JZ±GTE)V 725
F1430K 225 (2JZ±GTE)V 825
F1530M 125V1025 (2JZ±GTE)
: 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)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1I20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
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)
IC136FLOOR NO 2 WIRE AND COWL WIRE (LEFT KICK PANEL)IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
IF136INSTRUMENT 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)
BP140FUEL GAUGE WIRE AND FLOOR NO. 2 WIRE (LUGGAGE ROOM FRONT LH)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB32 (2JZ±GTE)FRONT SIDE OF LEFT FENDER
ED32 (2JZ±GTE)REAR SIDE OF INTAKE MANIFOLD
IF36LEFT KICK PANEL
BI40LEFT QUARTER PILLAR
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 732ENGINE ROOM MAIN WIREI 538INSTRUMENT PANEL WIREE 932ENGINE ROOM MAIN WIREI 838INSTRUMENT PANEL WIRE
E10I1138COWL WIRE
E12I1438INSTRUMENT PANEL WIRE
E1332ENGINE WIREI1638CONSOLE BOX WIRE
E1432ENGINE WIREI1738ENGINE WIRE
E15I2038COWL WIRE
E16B 640FLOOR NO. 2 WIRE
I 438COWL WIRE

80
ENGINE CONTROL (FOR 2JZ±GTE)

81