1986 TOYOTA SUPRA warning light

11 5
CURRENT IS APPLIED AT ALL TIMES THROUGH THE STOP FUSE TO TERMINAL 2 OF THE STOP LIGHT SW.
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 8 OF THE LIGHT FAILURE SENSOR, AND ALSO
FLOWS THROUGH THE REAR LIGHT WARNING LIGHT TO TERMINAL 4 OF THE LIGHT FAILURE SENSOR.
STOP LIGHT DISCONNECTION WARNING
WHEN THE IGNITION SW IS TURNED ON AND THE BRAKE PEDAL IS PRESSED (STOP LIGHT SW ON), IF THE STOP LIGHT CIRCUIT IS OPEN, THE
CURRENT FLOWING FROM TERMINAL 7 OF THE LIGHT FAILURE SENSOR TO TERMINAL 2 CHANGES, SO THE LIGHT FAILURE SENSOR DETECTS THE
DISCONNECTION 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. BY PRESSING THE BRAKE PEDAL, THE CURRENT FLOWING TO TERMINAL 8 OF THE LIGHT FAILURE SENSOR KEEPS THE
WARNING CIRCUIT ON HOLDING AND THE WARNING LIGHT ON UNTIL THE IGNITION SW IS TURNED OFF.
S11 STOP LIGHT SW
2±1 : CLOSED WITH BRAKE PEDAL DEPRESSED
L 2 LIGHT FAILURE SENSOR
2, 7±GROUND : APPROX. 12 VOLTS WITH STOP LIGHT SW ON
4, 8±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
11±GROUND : ALWAYS CONTINUOUS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
H1430R 930S1129
L 230R1030T 629
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C20FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1I20COWL 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)
IE136INSTRUMENT PANEL WIRE AND FLOOR NO. 2 WIRE (LEFT KICK PANEL)
BM140BACK DOOR NO. 1 WIRE AND FLOOR NO. 2 WIRE (LEFT SIDE OF PACKAGE TRAY TRIM)
B0140BACK DOOR NO. 2 WIRE AND BACK DOOR NO. 1 WIRE (BACK DOOR UPPER LEFT)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
BI40LEFT QUARTER PILLAR
BJ40LOWER BACK PANEL CENTER
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
B 340FLOOR NO 2 WIREB 740FLOOR NO. 2 WIRE
B 540FLOOR NO. 2 WIRE
1 2X 4 2 X
X7 8 X11X
X
3
5X
3
512
1
XXX H14 L 2 R 9 R10 S11
T6BLUE
18
SYSTEM OUTLINE
SERVICE HINTS

130
THEFT DETERRENT AND DOOR LOCK CONTROL
7. 5A
ST
1
50A MAIN
1
60A POWER
1
120A ALT
52 31
13 24 1 2
2
2
1K 11 2 2 2IJ1 2
IB3 8IB2 6
IB2 13
IF2 15
IF2 16 IF210 IJ213 EA13
1 21K 4
IF2 11
1 2P
N5
6
2A
1J 11D10 1K 12 1E18IF2 9IF28
ID1 16 ID1 6 ID1 3 ID1 13
ID1 5 3 12I21
I3
B1
IETAIL HEAD SRLY
KSW IND UL3 L2 LSWD
M
3 14
232
LOCK PLCK 10
L±OR±YG±W
R±Y
L±O
BB±W B L±OB R±Y G±WW±L B
Y
W±L
G
G±Y
L±WB Y W±B
W±B W±B
W±B
W±B
L±RL±W
L±YW
G±Y
L±W
G±BL±W
L±Y
L±R
W±BG±BL±Y G±Y
L±W
W±B W±BG±YB
B
B±W
2 2 2
9
I20 P2
U1
INTEGRATION RELAY
DOOR LOCK MOTOR AND
DOOR UNLOCK DETECTION
SW LHDOOR KEY LOCK AND
UNLOCK SW LH
D15D12
UNLOCK
WARNING
SW
T5
THEFT DETERRENT INDICATOR LIGHT
[TELLTALE LIGHT LH]
PARK/NEUTRAL
POSITION SW
(
NEUTRAL START SW)
THEFT DETERRENT ECU(
A/T) (
M/T)
STARTER
RELAY HE ADLIGHT
RE LA YTA I LL I GHT
RE LA Y
(
*1)
(
*2)
(
A/T)
(
M/T)
(
M/T)
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
CLUTCH
START SW C9
G±Y
BATTERYUNLOCK
LOCK
I4
B
(
A/T)
32 51
1
B1 2 2
W
B 23 B10 B25
B 20 B12 B6B22 B15 B T7 ,T13
A B

133
CURRENT ALWAYS FLOWS TO TERMINAL (A)9 OF THE THEFT DETERRENT ECU THROUGH THE DOOR FUSE, AND TO TERMINAL
(B)1 THROUGH THE DOME FUSE.
WHEN THE IGNITION SW TURNED ON, THE CURRENT FLOWING THROUGH THE ECU±IG FUSE " TERMINAL (A)7 OF THE ECU "
TERMINAL (A)6 FLOWS THROUGH THE COIL SIDE OF THE POWER MAIN RELAY TO GROUND, CAUSING THE RELAY TO OPERATE.
THE CURRENT FLOWING THROUGH THE DOOR FUSE FLOWS TO THE DOOR LOCK CONTROL SWITCHES, CAUSING THE INDICATOR
LIGHT TO LIGHT UP.
1. MANUAL LOCK OPERATION
WHEN THE DOOR CONTROL SW OR KEY SW ARE PUSHED TO LOCK POSITION, A LOCK SIGNAL IS INPUT TO TERMINAL (B)5, (B)22
(FOR KEY SW) OF THE THEFT DETERRENT ECU AND CAUSES THE ECU TO FUNCTION. CURRENT FLOWS FROM TERMINAL (A)9 OF
THE ECU " TERMINAL (A)3 " TERMINAL 2 (LH), TERMINAL 4 (RH) OF THE DOOR LOCK MOTORS " TERMINAL 4 (LH), TERMINAL 2
(RH) " TERMINAL (A)2 OF THE ECU " TERMINAL (A)4 " GROUND AND THE DOOR LOCK MOTOR CAUSES THE DOOR TO LOCK.
2. MANUAL UNLOCK OPERATION
WHEN THE DOOR LOCK CONTROL SW OR KEY SW ARE PUSHED TO UNLOCK POSITION, AN UNLOCK SIGNAL IS INPUT TO
TERMINAL (A)8, (B)6 (FOR KEY SW LH) OR (B)16 (FOR KEY SW RH) OF THE THEFT DETERRENT ECU AND CAUSES TO FUNCTION.
CURRENT FLOWS FROM TERMINAL (A)9 OF THE ECU " TERMINAL (A)2 " TERMINAL 4 (LH), TERMINAL 2 (RH) OF THE DOOR LOCK
MOTORS " TERMINAL 2 (LH), TERMINAL 4 (RH) " TERMINAL (A)3 OF THE ECU " TERMINAL (A)4 " GROUND AND THE DOOR
LOCK MOTOR CAUSES THE DOOR TO UNLOCK.
WHEN UNLOCK OPERATION OCCURS USING THE LH DOOR KEY SW, DOING THE UNLOCK OPERATION ONCE UNLOCKS ONLY THE
DRIVER'S DOOR. TO UNLOCK ALL THE OTHER DOORS TOGETHER, UNLOCK OPERATION MUST BE DONE AGAIN WITHIN 3
SECONDS OF THE FIRST OPERATION.
3. IGNITION KEY REMINDER OPERATION
*OPERATION OF DOOR LOCK BUTTON (OPERATION OF DOOR LOCK MOTORS)
WHEN THE IGNITION KEY IS IN THE CYLINDER (UNLOCK WARNING SW ON) AND THE DOOR IS OPENED AND LOCKED USING DOOR
LOCK BUTTON (DOOR LOCK MOTOR), THE DOOR IS LOCKED ONCE BUT EACH DOOR IS UNLOCKED SOON BY THE OPERATION OF
THE ECU. AS A RESULT OF ECU ACTIVATION, THE CURRENT FLOWS FROM TERMINAL (A)9 OF THE ECU " TERMINAL (A)2 "
TERMINAL 4 (LH), TERMINAL 2 (RH) OF THE DOOR LOCK MOTORS " TERMINAL 2 (LH), TERMINAL 4 (RH) " TERMINAL (A)3 OF THE
ECU " TERMINAL (A)4 " GROUND AND CAUSES ALL THE DOOR LOCK CONTROL SW AND DOOR LOCK KEY SW.
*KEY LESS LOCK OPERATION
WHEN THE IGNITION KEY IS STILL INSERTED IN THE CYLINDER (UNLOCK WARNING SW ON), THE DOOR IS OPEN AND UNLOCK
OPERATION IS PREVENTED BY KEEPING THE DOOR LOCK BUTTON PRESSED TO THE LOCK SIDE, THE DOOR IS KEPT IN THE LOCK
CONDITION. IF THE DOOR IS THEN CLOSED, A SIGNAL IS INPUT TO THE ECU FROM THE DOOR COURTESY SW. THIS ACTIVATES
THE ECU AND EACH DOOR IS UNLOCKED.
SYSTEM OUTLINE

134
THEFT DETERRENT AND DOOR LOCK CONTROL
D10, D11 DOOR COURTESY SW LH, RH
3±2 : CLOSED WITH DOOR OPEN
D12, D13 DOOR KEY LOCK AND UNLOCK SW LH, RH
1±3 : CLOSED WITH DOOR LOCK CYLINDER UNLOCKED WITH KEY
2±3 : CLOSED WITH DOOR LOCK CYLINDER LOCKED WITH KEY
D15, D16 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH
1±3 : CLOSED WITH UNLOCK POSITION
E 6 ENGINE HOOD COURTESY SW
1±2 : CLOSED WITH ENGINE HOOD OPEN
U 1 UNLOCK WARNING SW
2±1 : CLOSED WITH IGNITION KEY IN CYLINDER
L 3 LUGGAGE COMPARTMENT KEY UNLOCK SW
2±1 : CLOSED WITH DOOR LOCK CYLINDER UNLOCKED WITH KEY
L 5 LUGGAGE COMPARTMENT LIGHT SW
1±GROUND: CLOSED WITH DOOR OPEN
T 7(A), T13(B) THEFT DETERRENT ECU
(B) 9±GROUND: CONTINUOUS WITH LUGGAGE COMPARTMENT DOOR TO UNLOCK POSITION
(B)14±GROUND: CONTINUOUS WITH ENGINE HOOD OPEN
(B) 4±GROUND: CONTINUOUS WITH LUGGAGE COMPARTMENT DOOR OPEN
(B) 8±GROUND: CONTINUOUS WITH DOOR LOCK CONTROL SW TO UNLOCK POSITION
(B) 5±GROUND: CONTINUOUS WITH DOOR LOCK CONTROL SW TO LOCK POSITION
(B)25±GROUND: APPROX. 12 VOLTS WITH SHIFT LEVER IN N OR P POSITION AND IGNITION SW AT ST POSITION (A/T)
; APPROX. 12 VOLTS WITH CLUTCH PEDAL FULLY DEPRESSED (M/T)
(A) 7±GROUND: APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(B)20±GROUND: CONTINUOUS WITH IGNITION KEY IN CYLINDER
(B)15±GROUND: CONTINUOUS WITH LH DOOR TO UNLOCK POSITION
(B)21±GROUND: CONTINUOUS WITH RH DOOR TO UNLOCK POSITION
(B) 6±GROUND: CONTINUOUS WITH DOOR KEY LOCK AND UNLOCK SW LH TO UNLOCK POSITION
(B)16±GROUND: CONTINUOUS WITH DOOR KEY LOCK AND UNLOCK SW RH TO UNLOCK POSITION
(B)22±GROUND: CONTINUOUS WITH DOOR KEY LOCK AND UNLOCK SW TO LOCK POSITION
(A) 4±GROUND: ALWAYS CONTINUOUS
(B) 1±GROUND: ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 928E624 (2JZ±GTE)T125 (2JZ±GTE)
D1030E 626 (2JZ±GE)T 127 (2JZ±GE)
D1130I2029T 529
D1230L 330T 7A29
D1330L 530T13B29
D1430P225 (2JZ±GTE)U 129
D1530P 227 (2JZ±GE)
D1630P 830
: 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)
1D20FRONT DOOR LH 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)
SERVICE HINTS

161
10A
ECU±B10A
ECU±IG15A
STOP10A
GAUGE
1H 81K13 1I10 1E12
I5I14
1 2
I20
I24 2
B 13 A5B4A25 A12 B10 B3B12 B6B14
A 16 A3A10 A9A22 B8B16 B7B9B1A 9
B 1
I4
I22
I22I22 I22
IB 5 1IB52IB56IB54IB55IC29IC23
IB5 3
1 2
1 2
2 1
2 11
IGIF1 15
IC2 8
PARKING BRAKE SWABS SPEED SENSOR
REAR LH ABS SPEED SENSOR
FRONT LH ABS SPEED SENSOR
FRONT RH
ABS SPEED SENSOR
REA R RH
PKB STP GS1 GS2 GST IG1 BAT D/G TC WA
FR+ FR± FSS FL+ FL± RR+ RR± RSS RL+ RL±
BRAKE WARNING LIGHT
[COMB. METER] ABS WARNING LIGHT
[TELLTALE LIGHT LH]STOP LIGHT SW
ABS LATERAL
ACCELERATION
SENSOR DA TA LINK CONNECTOR 2
(
TDCL)
TC ABS GST GS2 GS1 GNDIG1 D5
A2 3
S11
T5 A1 1
A1 0
A3 2
A31
P5P±BL
V±G
W±R
B±R
W±L
R±L
B±O
W
Y Y G±W
LGV (
SHIELDED)
LGV (
SHIELDED) PL (
SHIELDED) B W (
SHIELDED)
B W (
SHIELDED) BR±B BR±B L R
L R
P±B
W±B
BR±WBR±W BR±W YLB±R W±R
BR±W
(
SHIELDED) (
SHIELDED)
L
P±B4
1236 14 4FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
B±R
BR±W BR±W
IF212
B C10 , C12A
ABS ECUA A18 , A19B L
I2
BR±W
BR±W TO BRAKE FLUID
LEVEL WARNING SW

194
UNLOCK AND SEAT BELT WARNING
1E 12
1B 52
1J 11C12 1I16 1I 15
1 2
2 1 7. 5A
DOME10A
GAUGE
SEAT BELT
WARNING LIGHT
[TELLTALE
LIGHT RH]
INTEGRATION RELAY
BUZZER
TIMER
UNLOCK
WARNING SWBUCKLE
SW LH FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
T6
B6 U1
Y
W±B
86 5 17 2
IE BI
R±B R±BY W±B
DOOR COURTESY
SW LH D10 101
1K 12
2 3
I7IC2 15
W±B
W±B W±B
B±W W±B
161
R
1E 1
Y±R
9

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

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