1986 TOYOTA SUPRA warning

195
CURRENT ALWAYS FLOWS TO TERMINAL 1 OF THE INTEGRATION RELAY THROUGH DOME FUSE.
1.SEAT BELT WARNING SYSTEM
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 7 OF THE INTEGRATION RELAY.
AT THE SAME TIME, CURRENT FLOWS TO TERMINAL 9 OF THE RELAY FROM THE GAUGE FUSE THROUGH THE SEAT BELT
WARNING LIGHT. THIS CURRENT ACTIVATES THE INTEGRATION RELAY AND CURRENT FLOWING THROUGH THE WARNING LIGHT
FLOWS FROM TERMINAL 9 OF THE RELAY " TERMINAL 10 " GROUND, CAUSING THE WARNING LIGHT TO LIGHT UP. A BUCKLE SW
OFF SIGNAL IS INPUT TO TERMINAL 8 OF THE RELAY, THE CURRENT FLOWING TO TERMINAL 7 OF THE RELAY FLOWS THROUGH
TERMINAL 10 " GROUND AND THE SEAT BELT WARNING BUZZER SOUNDS FOR APPROX. 4±8 SECONDS. HOWEVER, IF THE SEAT
BELT IS PUT ON DURING THIS PERIOD (WHILE THE BUZZER IS SOUNDING), SIGNAL INPUT TO TERMINAL 8 OF RELAY STOPS AND
THE CURRENT FLOW FROM TERMINAL 7 OF THE RELAY " TERMINAL 10 " GROUND IS CUT, CAUSING THE BUZZER TO STOP.
2. UNLOCK WARNING SYSTEM
WITH THE IGNITION KEY INSERTED IN THE KEY CYLINDER (UNLOCK SW ON), THE IGNITION SW STILL OFF AND DRIVER'S DOOR
OPENS (DOOR COURTESY SW ON), WHEN A SIGNAL IS INPUT TO TERMINAL 6 OF THE RELAY, THE INTEGRATION RELAY
OPERATES, CURRENT FLOWS FROM TERMINAL 7 OF THE RELAY " TERMINAL 10 " GROUND AND UNLOCK WARNING BUZZER
SOUNDS.
B 6 BUCKLE SW LH
1±2 : CLOSED WITH DRIVER'S SEAT BELT IN USE
D10 DOOR COURTESY SW LH
3±2 : CLOSED WITH LH DOOR OPEN
U 1 UNLOCK WARNING SW
2±1 : CLOSED WITH IGNITION KEY IN CYLINDER
INTEGRATION RELAY
10±GROUND : ALWAYS CONTINUOUS
6±GROUND : CONTINUOUS WITH DRIVER'S DOOR OPEN
5±GROUND : CONTINUOUS WITH IGNITION KEY IN CYLINDER
8±GROUND : CONTINUOUS WITH DRIVER'S SEAT BELT IN USE
9±GROUND :0 VOLTS WITH IGNITION SW ON AND BUCKLE SW OFF
1±GROUND : ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B 628T 629
D1030U 129
: 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)
1C20FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1I
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
BI40LEFT QUARTER PILLAR
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 738FLOOR NO. 2 WIRE
SYSTEM OUTLINE
SERVICE HINTS

196
UNLOCK AND SEAT BELT WARNING

200
SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
7. 5A
IGN15A
CIG10A
ECU±B
1G 10 1G61E13
152
II1 12 II121 IF12IF111
I14
I14 I 5
1E3 1E4
1G7 1G9
13 14 12 7
8 9 11 10 34 21 56+SL ±SL +SR ±SR D+ D± P+ P± E1 E2AB TC AB TC
511 12 4
P±B B±Y B±Y
P±B
B±O
L±R
B±Y W±R
B±Y
P±B
B±Y
P±B B±Y
P±B
B±Y
P±B B±Y
P±B
S RS WARNING
LIGHT
[TELLTALE
LIGHT RH] T6DA TA LINK
CONNECTOR 1
(
CHECK CONNE CTOR)DATA LINK
CONNECTOR 2
(
TDCL) D1 D5 FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
1G 31G4
1J 1
IE 12
12 12
12
F1 F2
A2 7 A2 8 IG2 ACC LA TC
FRONT AIRBAG
SENSOR LHFRONT AIRBAG
SENSOR RH
AIRBAG SQUIB
(
STE ERING WHE EL
PAD)AIRBAG SQUIB
(
FRONT PASSENGER
AIRBAG ASSEMBLY) CENTER AIRBAG SENSOR ASSEMBLY
W±BR
W
GR
B
Y
L
G
BR
W±B
W±B
C5
SPIRAL
CABLE AABB (
*1)(
*1)* 1 : CONNECTION DETECTION PIN

221
*1 : USA
*
2 : CANADA*3 : 2JZ±GTE
*
4:2JZ±GE
10A
PANEL
1I 3
II1 7 II136 II11II118 II117 II127
C 4C10 C6C7C8C11
A 1C13 B7B5B4A14 B2B1
I2 I2I14
A A
EB IH EC 2 1 1II1 33
II1 34
2 1
IB2 14 IF1 15
D6
P5J1
E7
BRAKE FLUID LEVEL
WARNING SW
DIODE
ENGINE OIL
LEVEL SENSOR
JUNCTION
CONNECTORPARKING BRAKE
SW
DAYTIME RUNNING
LIGHT RELAY
(
MAIN)
OIL
PKBDELAYCOMBINATION METER FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
GR
R±B
L
G± R
LG±R
G±B G±B LG±RG±RL R±BGR BR±W
W±B
W±B
G
L±W
Y±G
R±Y
R±G Y±GG BR W±B W±BBR±W BR±W B±W
BR±W
BR±W R±W W±B
Y±G (
*3)
L±WR±Y
Y±G R±G
BR±W BR±W B±W(
*2 *3) B±W(
*2)G±OG±O
BRAKE
P
R
N
D
2
L
MASTER (
*1) (
*2)
(
*1)
(
*4)
(
*4) (
*1 *3)
(
*2)
TO GENE RATOR
(
ALTERNATOR)
FROM A/T INDICATOR LIGHT SW
[PARK/NEUTRAL POSITION SW
(
NEUTRAL START SW)
]
12
18
8
B2
C C10 , C11 , C 1 2BA
44
R±W
(
*3)
W±B
A

224
COMBINATION METER
B 2 BRAKE FLUID LEVEL WARNING SW
1±2 : CLOSED WITH FLOAT DOWN
P 5 PARKING BRAKE SW
1±GROUND : CLOSED WITH PARKING BRAKE LEVER PULLED UP
O 2 OIL PRESSURE SW
1±GROUND : CLOSED WITH OIL PRESSURE ABOVE APPROX. 20 KPA (2.8 PSI, 0.2 KG/CM2)
E 4 ENGINE COOLANT TEMP. SENDER (WATER TEMP. SENDER)
1±GROUND : APPROX. 160±240
(50°C, 122°F)
: APPROX. 17.1±20.4
(120°C, 288°F)
E 7 ENGINE OIL LEVEL SENSOR
1±2 : CLOSED WITH FLOAT UP AND ENGINE OIL TEMP. AT BELOW APPROX. 55°C (131°F)
OPEN WITH FLOAT DOWN AND ENGINE OIL TEMP. AT BELOW APPROX. 60°C (140°F)
F14 FUEL SENDER
1±2 : APPROX. 3
AT FUEL FULL
: APPROX. 11 0
AT FUEL EMPTY
C10(B), C12(A) COMBINATION METER
(B) 9±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(A)16±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ST POSITION AND SHIFT LEVER AT P OR N POSITION (A/T)
12 VOLTS WITH IGNITION SW AT ST POSITION AND CLUTCH PEDAL DEPRESSED (M/T)
(A) 8±GROUND : ALWAYS CONTINUOUS
(A)11±GROUND : ALWAYS CONTINUOUS
(A) 2±GROUND : ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B224 (2JZ±GTE)E 426 (2JZ±GE)O 227 (2JZ±GE)B 226 (2JZ±GE)E724 (2JZ±GTE)P225 (2JZ±GTE)
C 928E 726 (2JZ±GE)P 227 (2JZ±GE)
C10B28E1029P 529
C11C28F1430T 529
C12A28I 427T 629
D 628J 129V1025 (2JZ±GTE)
E 424 (2JZ±GTE)O 225 (2JZ±GTE)V1027 (2JZ±GE)
: 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)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1G
1H
1I20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1J
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
: 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)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IE136INSTRUMENT PANEL WIRE AND FLOOR NO. 2 WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
IF336INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT KICK PANEL)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
BP140FUEL GAUGE WIRE AND FLOOR NO. 2 WIRE (LUGGAGE ROOM FRONT LH)
SERVICE HINTS

240
GROUND POINT
FRONT FOG LIGHT AND
PA RKING LIGHT RH
EFI NO. 2 RELAY
EFI MAIN RELAY
HEATER RELAY
FRONT WIPER MOTOR
A/C CONDENSER FAN
MOTOR
BRAKE FLUID LEVEL
WARNING SW
TRACTION PUMP AND
MOTOR
COMBINATION METER
ENGINE OIL
LEVEL SENSOR
NOISE FILTER
IGNITER FRONT FOG LIGHT AND
PARKING LIGHT LH FRONT SIDE MARKER
LIGHT LHDA YTIME
RUNNING
LIGHT RELAY
NO. 3
FRONT SIDE MARKER
LIGHT RH
ENGINE HOOD
COURTESY SW
FRONT TURN SIGNAL
LIGHT LH
FRONT TURN SIGNAL
LIGHT RH
HEADLIGHT LO RH
HEADLIGHT LO LH
ABS RELAY
A /C DUA L PRE SSURE
SW
ABS SOLENOID
RELAY
TRACTION SOLENOID
RELAY
A BS ACTUATOR E2
E5
E8 E8 E2 E2E2 0 2
2
2
5
5
EB EA
HEATED OXYGEN
SENSOR(
SUB)
HEATED OXYGEN
SENSOR(
MAIN)
ED EC II1 24
I17 E16 I 17I11
IJ1 18
(
E1)
(
E01)
(
E02) IC18 W±B
W±B
W±B
W±B W±B
W±B W±BW±B
W±B
W±B
W±B
W±B
W±B
BR
BR
BR
BRBR
BR W±BW±B
(
*4)
W±B
(
*3) W±B
(
*3)W±B
(
*1)
W±B
(
*4)
W±B
W±B
W±B
W±B
W±B
W±B W±BW±B W±B
BR BR
BR
BR
BR
BR
BR BR
BR BRBR
BR
W±B
(
*3)W±B
W±B
(
*3) E7 :*3
E20 : * 4E2:*3
E18 : * 4E2:*3
E18 : * 4
E2:*3
E18 :
*4
E5:*3
E19 : * 4
DAYTIME RUNNING
LIGHT RELAY
NO. 3 RADIATOR FAN MOTOR
E11 : * 3
E24 :
*4W±B
W±B
W±B W±B
W±B
(
*1)E2:*3
E18 : * 4
W±B
(
*3)
(
±S)(
±S)
DATA LINK CONNECTOR 2
(
TDCL)
DATA LINK CONNECTOR 1
(
CHECK CONNECTOR) RADIATOR FAN
RELAY NO. 2 (
E) ENGINE COOLANT TEMP.
SW(
WATER TEMP. SW)
(
±S)
E3
W±B W±B
W± B W± B W±B W±B
W±B
W± B
BR E2:*3
E18 : * 4
(
L)
E8 W±B
(
*1)
(
*3) (
*3)(
*3)
(
*3)
(
*3)(
*3)
(
*3)
(
*3)
(
*3)
ENGINE CONTROL
MODULE
(
ENGI NE AND
ELECTRONICALLY
CONTROLLED
TRANSMI SSION)
W±B

Remote Control MirrorSeat Heater (for Canada)SRS (Supplemental
Restraint System)Shift LockStartingTheft Deterrent and
Door Lock ControlTurn Signal and Hazard
Warning LightUnlock and Seat Belt
Warning
HeadlightHornIlluminationInterior LightLight Auto Turn OffPower SeatPower SourcePower WindowPPS (Progressive
Power Steering)Radio and Player
ABS (Anti±Lock Brake
System)Auto AntennaABS and Traction ControlBack±Up LightChargingCigarette LighterCombination MeterCruise ControlElectronically Controlled
Transmission and A/T
IndicatorEngine ControlFog Light
5±417±325±321±11±416±8 (for 2JZ±GE)24±418±319±3
23±3 (w/ Stereo
Power Amplifier)
24±2 (w/o Stereo
Power Amplifier)1~26±120±312±212±411±28±310±3
13±321±29±214±31±27±4
Taillight
11±421±47±210±2
SYSTEM INDEX
Stop Light
248
Clock
20±315±8 (for 2JZ±GTE)
Electric Tension Reducer
20±416±3 (for 2JZ±GE)15±3 (for 2JZ±GTE)
Front Wiper and Washer
22±44±3 (for 2JZ±GE)3±3 (for 2JZ±GTE)
6±3 (for Canada)5±3 (for USA)
Ignition
9±42±4 (for 2JZ±GE)2±2 (for 2JZ±GTE)
Radiator Fan and
Automatic Air
Conditioning
26±3
Remote Window Defogger
and Mirror Heater
20±2
Rear Wiper and Washer
22±2
OVERALL ELECTRICAL WIRING DIAGRAM

1
234
1 SUPRA ELECTRI CAL WI RI NG DI AGRAM
7ACC
IG1
ST1
IG2 AM1 4
8
3 2AM2
222
221J 6 1J 4
2 1
5 3
21K 4
2A22 1
2IJ1IJ2131J 31J5
1E 81E12
34 II1 23 II1
2 EA3EA2 4
1B
B
A
A
A L
IG
S IJ29 3EA1
4IB1 2
1
B
1
A I19
IGNITION SW
50A AM1
(
for USA)
60A AM1
(
for Canada)
50A
MAINSTARTER
RELAY
7. 5A
ALT±S120A
ALT30A
AM2
BAT TERY[ST ARTERTo Theft Det err ent
ECU< 14±4>
To Engine Control Module
(
Engine and Electr onic ally
Cont rolled Transmission ECU)
< 3±5> < 4±8> < 15±2> < 16±2>To Combination
Meter< 25±6> C9
CLUTCH
START SW
(
M/T) 7. 5A
ST
P
NP2
PARK/ NEUTRAL
POSI TI ON SW
(
NE UT RA L
START SW)
(
A/ T)7. 5A
IGN10A
GAUGE
T6
CHARGE WARNING LIGHT
[TELLTALE LIGHT RH]
(
*1)
(
*2)
1
2
3
G1 B ,G2 A
GE NE RA TOR
(
AL TERNATOR)
1
123 B G1 AG 2 BLACK GE NE RA TOR(
AL TERNATOR) S2 A , S3 B
1
1 ST ARTER
A S2 BS 3 BL ACK
W
W
W WW±R W± RBB BB±WB±WBB B
B L±O
B B L±OB
B B±O Y±GY W
B±Y
B±O
W W
W W Y±GY W
Y±G B± W B± WBB±W
B
B
(
A/T)
(
M/T) (
M/T) (
M/T) (
M/T)
(
A/T) (
A/ T)(
A/T) (
A/T)
(
M/T)3
6
22 22
11 111
212
5 B±Y
B±W
B±OB±W
11EA3EA2 1
6IB2IB3 8 (
*1)(
*1)
(
*2)(
*2)
B
*2: 2JZ±GE *1: 2JZ±GTE
To Day time Running
Light Relay(
Ma i n)
< 6±1>
B(
A/ T)Y±GFrom Combination
Meter< 25±5>
Y± G W
W
Charging Starting Power Source
1B 4
W*3 : Canada
(
*3)