1986 TOYOTA SUPRA warning

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.

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

97
2 117 5
6
14 13
12 9 117
13 16 18COMBINATION
SW
OFF
TA IL
HEA D
LOW
FLASH
DIMMER SWLIGHT
CONTROL
SW
C13R
R±W
W±B W±BG±WW±B
G±W
R R±Y
R±YR±Y
R±Y R
R±Y
W
R±Y
HIGH E7
IB3 1
2 1
EBI4
I2
I2 DAYTIME RUNNING
LIGHT RELAY(
MAIN) D6
TO THEFT DETERRENT ECU
R±Y B±W R±W W±B
IG1K 5
1J 1
W±B W±B
R±L
W W
R±Y
B2 DIODE
BRAKE FLUID
LEVEL WARNING SWIB 2 13
R±Y
4
431 2422
22
R±L
DIMMER RELAY
(
DAYTIME RUNNING
LIGHT RELAY NO. 2)
INTEGRATION
RELAY I20
IE

103
10A
GAU GE
B5
B8
B7
B5 B7
B3
BI BJ181
IE1 5
1 2
1 2FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
G G
G W±B
W±B
1C 2
G
Y
V V LG LG
LG W±B
W±B
W±B W±B W±B
G
W± BW±B
W±B
911
55 384
11 LIGHT FAILURE SE NSOR L2
REAR LIGHT
WARNING LIGHT
[TELLTALE
LIGHT RH] T6 TAI L LI GHT
[REAR COMB. LIGHT]
RH LH
DELAY
CIRCUIT REAR SIDE
MARKER LIGHT
RH LH R11 R12
R9 R10
W±B±
+1E 12
Y
G
B6
W± B

104
TAILLIGHT
WHEN THE LIGHT CONTROL SW IS TURNED TO TAIL OR HEAD POSITION. THE CURRENT FLOWS TO TERMINAL 3 OF THE LIGHT
FAILURE SENSOR THROUGH THE TAIL FUSE.
WHEN THE IGNITION SW IS TURNED ON, THE CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 8 OF THE LIGHT FAILURE
SENSOR, ANO ALSO FLOWS THROUGH THE REAR LIGHT WARNING LIGHT TO TERMINAL 4 OF THE LIGHT FAILURE SENSOR.
TAILLIGHT DISCONNECTION WARNING
WITH THE IGNITION SW ON AND THE LIGHT CONTROL SW TURNED TO TAIL OR HEAD POSITION, IF THE TAILLIGHT CIRCUIT IS
OPEN, THE LIGHT FAILURE SENSOR DETECTS THE FAILURE BY THE CHANGE IN CURRENT FLOWING FROM TERMINAL 3 OF THE
LIGHT FAILURE SENSOR TO TERMINAL 9, AND THE WARNING CIRCUIT OF THE LIGHT FAILURE SENSOR IS ACTIVATED.
AS A RESULT, THE CURRENT FLOWS FROM TERMINAL 4 OF THE LIGHT FAILURE SENSOR " TERMINAL 11 " GROUND AND TURNS
THE REAR LIGHT WARNING LIGHT ON, WHICH REMAINS ON UNTIL THE LIGHT CONTROL SW IS TURNED OFF.
TAILLIGHT RELAY
5±3: CLOSED WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
L 2 LIGHT FAILURE SENSOR
4, 8±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
3±GROUND : APPROX. 12 VOLTS WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
11±GROUND : ALWAYS CONTINUOUS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1328F 526 (2JZ±GE)R 930
F324 (2JZ±GTE)F624 (2JZ±GTE)R1030F 326 (2JZ±GE)F 626 (2JZ±GE)R1130
F424 (2JZ±GTE)I2029R1230F 426 (2JZ±GE)L 130T 629
F 524 (2JZ±GTE)L 230
: 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)
1A20ENGINE ROOM MAIN WIRE AND J/B NO 1 (LEFT KICK PANEL)1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1C20FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL 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)
IE136INSTRUMENT PANEL WIRE AND FLOOR NO. 2 WIRE (LEFT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EA32 (2JZ±GTE)FRONT SIDE OF RIGHT FENDEREA34 (2JZ±GE)FRONT SIDE OF RIGHT FENDER
EB32 (2JZ±GTE)FRONT SIDE OF LEFT FENDEREB34 (2JZ±GE)FRONT SIDE OF LEFT FENDER
IE36LEFT KICK PANEL
BI40LEFT QUARTER PILLAR
BJ40LOWER BACK PANEL CENTER
SYSTEM OUTLINE
SERVICE HINTS

111
TURN SIGNAL AND HAZARD WARNING LIGHT

11 2
TURN SIGNAL AND HAZARD WARNING LIGHT
15A
HAZ±
HORN7. 5A
TURN
5 6
5 6
1 2
1 2 I3
I3
I2
B5
IE EB BI EA BJ IHA A 21E7
41C41C3 44IF1 12IF1 17
1H11
1H7
1A7
1A4 1E 19 1E14
B 6 A
B 7 IF1 4IB1 3
W W W
G±R W±R
R±B
G±B
G±Y R±B
G±B G±B W±BG±B W±B W±B
W±B
W±B W±B
W±B W±BR±B
G±B
G±Y
G±Y
G±Y
G±B
R±B
G±Y
G±B
G±Y
G±B
W±B G±Y
G±YW±B
W±B R±B W±RW±B
9 756 158
3 21FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
810 2
15 TURN LH
RHTB TL TR
HAZARD OFF
ONFTBB2TLB1TR HA ZARD S W H10
TURN SIGNAL SW [COMB. SW] C13
TURN S I GNAL
FLASHER
FRONT TURN SIGNAL
LIGHT LH F7
FRONT TURN SIGNAL
LIGHT RH F8REAR TURN SIGNAL
LIGHT LH
[REAR COMB. LIGHT LH] R9
REAR TURN SIGNAL
LIGHT RH
[REAR COMB. LIGHT RH] R10TURN SIGNAL
INDICATOR LIGHT
[COMB. METER]
JUNCTION
CONNECTORJ1 LH TURN RH BL
E
E2:2JZ±GTE
E18 : 2JZ±GEE2:2JZ±GTE
E18 : 2JZ±GEA C10 , C12B 1