1986 TOYOTA SUPRA check engine

61
* 1 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
A 2B5B4B10 B11 B12 B6A1
B 77 B76 B57 B56 B55 B54 B53 B52 B58
B 26 B6B25 B5B27 B7A16A 4 A 3 B 7 B 8 B 9 B 3 B 2 B 1
G1
G1± G2 G2± NE NE±TACOGN D IGF IGT6 IGT5 IGT4 IGT3 IGT2 IGT1+B IGC2 I GC3 IGC4 IGC5 I GC6 I GC1 TACH
STA NSW I GT1 I GT2 IGT3 IGT4 I GT5 IGT6 IGFE16 E11 E11 E11 E11 E11 E16
2 1
2 1
2 1
2 1
2 1
2 1
2 12121
EC 2 1
EDII1 29 B±O
B±W
BB±O B±O B±O B±O B±O B±O B±O
B±O
B±O
B±O
B±O
B±O
B±O
B±O
B G Y±R Y±GY±BY L±Y B±W
R±W
B±O
GR±B
GR±G
P±B
L±O
R±Y
BR
B±O BR B±W B±W
BR BRIG±
19
A A AA
(
SHIELDED)
(
SHIELDED)I GNITION COI L
NO. 2
NOISE FILTER
DATA LI NK CONNECTOR 1
(
CHECK CONNECTOR)
IGNITER
ENGINE CONTROL MODULE
(
*1)
CAMSHA FT P OS ITION
SENSOR NO. 1CA MSHA FT P OSITION
SENSOR NO. 2CRA NKS HAFT POS ITION
SENSORTO TACHOME TER
[COMB. METER]
BR
A E9 , E10BB I2 ,I3A
I7
N1
D1
C3
C2 C1
I GNITION COI L
NO. 3 I8
I GNITION COI L
NO. 4 I9
I GNITION COI L
NO. 5 I10
I GNITION COI L
NO. 6 I11
I GNITION COI L
NO. 1 I6
(
A/ T)
(
A/T)
JUNCTI ON
CONNECTOR J2 I17
L L
B±R B±WWO
OBR
BR
(
SHIELDED)

65
2 1 IGNITION
COIL
21
1234
A 77 76 57 58 27 26 25 734519
A B B±WB±O B±O B±O
B±O
B±O B±O
B±W
B±W
B±RB±W
B±O B±O B
R
W
G
BR R±Y R±W B±WB
BR
(
A/T)
(
A/T)
(
SHIELDED)
+B EXT C±
STA NSW IGT IGF NE G1 G2 G±NE G1 G2 G± IGF IGTNOISE
FILTER IG±TO TACHOMETER
[COMB. METER]
DATA LINK
CONNECTOR 1
(
CHECK
CONNECTOR)
DISTRIBUTOR IGNITER
ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU)JUNCTION
CONNECTOR 21
ED EC I20
E22 IJ1 9IJ11
II1 29
D1
N1
J2
E9I4
D4I5
E28
B±W

71
2. CONTROL SYSTEM
*SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM
THE SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM MONITORS THE ENGINE CONDITION
THROUGH THE SIGNALS INPUT FROM EACH SENSOR (INPUT SIGNALS FROM (1) TO (13) ETC.) TO THE ENGINE CONTROL
MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU). THE BEST FUEL INJECTION TIMING IS DECIDED
BASED ON THIS DATA AND THE PROGRAM MEMORIZED BY THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU), AND THE CONTROL SIGNAL IS OUTPUT TO TERMINALS #10, #20, #30, 40, #50 AND #60 OF
THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) TO OPERATE THE
INJECTOR (INJECT THE FUEL). THE SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM
PRODUCES CONTROLS OF FUEL INJECTION OPERATION BY THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) IN RESPONSE TO THE DRIVING CONDITIONS.
*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM
THE ESA SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT TO THE ENGINE CONTROL MODULE
(ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4) TO
(13) ETC.). THE BEST IGNITION TIMING IS DECIDED ACCORDING TO THIS DATA AND THE MEMORIZED DATA IN THE ENGINE
CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AND THE CONTROL SIGNAL IS OUTPUT
TO TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5 AND IGT6 THESE SIGNALS CONTROL THE IGNITER TO PROVIDE THE BEST IGNITION
TIMING FOR THE DRIVING CONDITIONS.
*HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM
THE MAIN HEATED OXYGEN SENSOR, SUB HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM TURNS THE HEATER ON
WHEN THE INTAKE AIR VOLUME IS LOW (TEMP. OF EXHAUST EMISSIONS IS LOW), AND WARMS UP THE OXYGEN SENSOR TO
IMPROVE DETECTION PERFORMANCE OF THE SENSOR. THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4), (9) TO
(11) ETC.), AND OUTPUTS CURRENT TO TERMINALS HT1, HT2 TO CONTROL THE HEATER.
*IDLE AIR CONTROL (IDLE SPEED CONTROL) SYSTEM
THE IDLE AIR CONTROL (ISC) SYSTEM (STEP MOTOR TYPE) INCREASES THE ENGINE SPEED AND PROVIDES IDLING STABILITY
FOR FAST IDLE±UP WHEN THE ENGINE IS COLD, AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD AND SO
ON. THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) EVALUATE THE
SIGNALS FROM EACH SENSOR (INPUT SIGNALS FROM (1), (4), (5), (8), (9), (11) ETC.), OUTPUTS CURRENT TO TERMINALS ISC1,
ISC2, ISC3 AND ISC4 TO CONTROL THE IDLE AIR CONTROL VALVE (ISC VALVE).
*EGR CONTROL SYSTEM
THE EGR CONTROL SYSTEM DETECTS THE SIGNAL FROM EACH SENSOR (INPUT SIGNALS FROM (1), (4), (9), (10) ETC.), AND
OUTPUTS CURRENT TO TERMINAL EGR TO CONTROL THE EGR VALVE.
*FUEL PUMP CONTROL SYSTEM
THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) OUTPUTS CURRENT TO
TERMINAL FPC AND CONTROLS THE FUEL PUMP ECU AND FUEL PUMP DRIVE SPEED IN RESPONSE TO THE DRIVING
CONDITIONS.
3. DIAGNOSIS SYSTEM
WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTION IN THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) SIGNAL SYSTEM, THE MALFUNCTIONING SYSTEM IS RECORDED IN THE
MEMORY. THE MALFUNCTIONING SYSTEM CAN BE FOUND BY READING THE CODE DISPLAYED BY THE MALFUNCTION INDICATOR
LAMP (CHECK ENGINE WARNING LIGHT).
4. FAIL±SAFE SYSTEM
WHEN A MALFUNCTION HAS OCCURRED IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY
CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM
BY USING DATA (STANDARD VALUES) RECORDED IN THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) MEMORY OR ELSE STOPS THE ENGINE.

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

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

83
(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.
2. CONTROL SYSTEM
*SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM
THE SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM MONITORS THE ENGINE CONDITION
THROUGH THE SIGNALS INPUT FROM EACH SENSOR (INPUT SIGNALS FROM (1) TO (13) ETC.) TO THE ENGINE CONTROL
MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU). THE BEST FUEL INJECTION TIMING IS DECIDED
BASED ON THIS DATA AND THE PROGRAM MEMORIZED BY THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU), AND THE CONTROL SIGNAL IS OUTPUT TO TERMINALS #10, #20, #30, 40, #50 AND #60 OF
THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) TO OPERATE THE
INJECTOR (INJECT THE FUEL). THE SEQUENTIAL MULTIPORT FUEL INJECTION (ELECTRONIC FUEL INJECTION) SYSTEM
PRODUCES CONTROLS OF FUEL INJECTION OPERATION BY THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) IN RESPONSE TO THE DRIVING CONDITIONS.
*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM
THE ESA SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT TO THE ENGINE CONTROL MODULE
(ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4) TO
(13) ETC.). THE BEST IGNITION TIMING IS DECIDED ACCORDING TO THIS DATA AND THE MEMORIZED DATA IN THE ENGINE
CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AND THE CONTROL SIGNAL IS OUTPUT
TO TERMINAL IGT. THIS SIGNAL CONTROLS THE IGNITER TO PROVIDE THE BEST IGNITION TIMING FOR THE DRIVING
CONDITIONS.
*HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM (FOR CALIFORNIA)
THE MAIN HEATED OXYGEN SENSOR FRONT AND REAR SIDE, SUB HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM
TURNS THE HEATER ON WHEN THE INTAKE AIR VOLUME IS LOW (TEMP. OF EXHAUST EMISSIONS IS LOW), AND WARMS UP THE
OXYGEN SENSOR TO IMPROVE DETECTION PERFORMANCE OF THE SENSOR. THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS FROM
(1), (2), (4), (9) TO (11) ETC.), AND OUTPUTS CURRENT TO TERMINALS HT1, HT2, HT3 TO CONTROL THE HEATER.
*IDLE AIR CONTROL (IDLE SPEED CONTROL) SYSTEM
THE IDLE AIR CONTROL (ISC) SYSTEM (STEP MOTOR TYPE) INCREASES THE ENGINE SPEED AND PROVIDES IDLING STABILITY
FOR FAST IDLE±UP WHEN THE ENGINE IS COLD, AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD AND SO
ON. THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) EVALUATES THE
SIGNALS FROM EACH SENSOR (INPUT SIGNALS FROM (1), (4), (5), (8), (9), (11) ETC.), OUTPUTS CURRENT TO TERMINALS ISC1,
ISC2, ISC3 AND ISC4 TO CONTROL THE IDLE AIR CONTROL VALVE (ISC VALVE).
*EGR CONTROL SYSTEM
THE EGR CONTROL SYSTEM DETECTS THE SIGNAL FROM EACH SENSOR (INPUT SIGNALS FROM (1), (4), (9), (10) ETC.), AND
OUTPUTS CURRENT TO TERMINAL EGR TO CONTROL THE EGR VALVE.
*FUEL PUMP CONTROL SYSTEM
THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) OUTPUTS CURRENT TO
TERMINAL FPC AND CONTROLS THE FUEL PUMP ECU AND FUEL PUMP DRIVE SPEED IN RESPONSE TO THE DRIVING
CONDITIONS.
*ACIS (ACOUSTIC CONTROL INDUCTION SYSTEM)
ACIS INCLUDES A VALVE IN THE BULKHEAD SEPARATING THE SURGE TANK INTO TWO PARTS. THIS VALVE IS OPENED AND
CLOSED IN ACCORDANCE WITH THE DRIVING CONDITIONS TO CONTROL THE INTAKE MANIFOLD LENGTH IN TWO STAGES FOR
INCREASED ENGINE OUTPUT IN ALL RANGES FROM LOW TO HIGH SPEEDS.
THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) JUDGES THE VEHICLE
SPEED BY THE SIGNALS ((4), (5)) FROM EACH SENSOR AND OUTPUTS SIGNALS TO THE TERMINAL ACIS TO CONTROL THE VSV
(FOR INTAKE CONTROL VALVE).
3. DIAGNOSIS SYSTEM
WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTION IN THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) SIGNAL SYSTEM, THE MALFUNCTIONING SYSTEM IS RECORDED IN THE
MEMORY. THE MALFUNCTIONING SYSTEM CAN BE FOUND BY READING THE CODE DISPLAYED BY THE MALFUNCTION INDICATOR
LAMP (CHECK ENGINE WARNING LIGHT).
4. FAIL±SAFE SYSTEM
WHEN A MALFUNCTION HAS OCCURRED IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY
CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM
BY USING DATA (STANDARD VALUES) RECORDED IN THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) MEMORY OR ELSE STOPS THE ENGINE.

I17 I17 I17 I17
ED II1 31 EA12IJ211
IJ118 IJ113 IJ117 IJ15 A 34 A23 A12A 17
A 20 A19 B29 A6 B 69 B 28 A2B80 B79
3 4 1 19 12 15
13 8 14VF2
TE1 TE 2VF1 E1 W SP1 EO1 EO2
BR BRGR±R
Y±L
P±G
LG
P
BR
BR W
BR L±R B±WB±RR±L
Y±L
LG
L±B Y±L
P±G
LG
BR W
BR
BR
L±O
Y±L
P±G
LG
BR
L±B
P
BR
BR BR
BR
BRBR±BW±GL±R L±R
W±G
BR±B
A /C A CMG OD1TT
TO A/C AMPLIFIER
TO A/ C MA GNETI C
CLUTCH RELAY
TO CRUISE CONTROL
ECU
(
SHIELDED)
(
SHIELDED)
(
*1)OX2
+B
IG±
FP
OX1
E1VF2
TE1
VF1 DATA LINK CONNECTOR 1
(
CHECK CONNECTOR) D1 ENGINE CONTROL MODULE(
*3) B E9 ,E10AB 74 B 39 B 34 B32 B35 B332 1
1 2 25
6 4 3 1E24 E24
ISC2 ISC4 ISC1 ISC3 ACIS EVAP
G±W
R±G
V±Y
G±O
G±Y
VB±R
B±R
B±R B±R
VSV(
FOR EVAP) VSV(
FOR A CI S) IDLE AIR CONTROL VALVE
(
ISC VALVE) I1
V1
V3
IC18
BR B±RB±R
(
A/T) B±R
B±R
BR
(
*1) E24B±R
(
*1)
(
A/T)
88
ENGINE CONTROL (FOR 2JZ±GE)

89
* 2 : EXCEPT CALIFORNIA *
1 : CALIFORNIA
*
3 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
10A
GAUGE
I5 I14 I14 I14
I14
I11II1 15 II111II1 23 1E 12
IJ1 6
II1 2II18 IF173 2
65
32
12738 511
TE1 TE2 ENG E1
Y±L
P±G
LG
L±B
P
BR
BR GR±R
L±BYY
L±R
L±R L±B
BR
Y±L
P±G
LG
BRGR±R
L±B L±B L±B
PP
L±RYY
Y
Y
Y Y
R L±R L±R
RL±RR
TT W
DATA LINK CONNECTOR 2
(
TDCL)
TELL TALE
LIGHT RHMALFUNCTION INDICATOR LAMP
(
CHECK ENGINE WARNING LIGHT)
[TELLTALE LIGHT LH] D5
T6T5
FROM POWER SOURCESYSTEM(
SEE PAGE 56)
SPEEDOMETER
[COMB. METER]
VEHICLE SPEED SENSOR
(
SPEED SENSOR)
NO. 1
(
FOR COMBINATION METER) V10
ODO AN D
TRI P
B C10 , C12
AA 9
A 10 A11
B 11
IF
BR BR
(
A/T)
(
A/T)
(
*1)7
BRBR
I8