TOYOTA SUPRA 1986 Service Repair Manual

102
TAILLIGHT
23 1510A
TA I L
1 2
1A 31C16 1K 11
B6
1 3
1 3
1 2
1 2
OFF
TAIL
HEAD1B2
1J 11K 5 2
EB EA IE
W±L
G
G
G
G
G W±B
W±B
W±B W±B W±BW±B W±BB
G±W G
G
W±B G
11
2 4
2 5
1
G
TAILLIGHT
RELAY
INTEGRATION
RE LAY
LIGHT CONTROL SW
[COMB. SW] C13
BATTERY
LICENSE PLATE
LIGHT L160A POWER 120A ALT
PARKING LIGHT
[FRONT FOG LIGHT]
FRONT SIDE
MARKER LIGHT
RH RH LH LH 1
1 2
2
2A 1
E2:2JZ±GTE
E18 : 2JZ±GE
F3 F4 F5 F6
E2:2JZ±GTE
E18 : 2JZ±GE
DIODE
W±B
I20
2 2
W
E2:2JZ±GTE
E18 : 2JZ±GE
W±B
W±B

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

105
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 232ENGINE ROOM MAIN WIREB 6
E1834ENGINE ROOM MAIN WIREB 740FLOOR NO. 2 WIRE
B 340FLOOR NO 2 WIREB 8
40FLOOR NO. 2 WIRE
B 540FLOOR NO. 2 WIRE

106
FOG LIGHT
15A
HE AD(
LH±LWR)
(
FOR CANADA) 15A
HEAD(
LH)
(
FOR USA)15A
FOG
25 13
IB 2 15
IE EB EA1 2
1 2 22 22
22
9 22
3 7 6 11
G±O G±R
R±G
W±B
W±B
W±BG±O
G±O OO R±B
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
FOG LIGHT
RELAY
OFF
FOG
LOW
FOG LIGHT SW
[COMB. SW] C13FRONT FOG
LIGHT RH
[PARKING
LIGHT RH] FRONT FOG
LIGHT LH
[PARKING
LIGHT LH] F3 F4E2:2JZ±GTE
E18 : 2JZ±GE
W±B
W±B
W±BE2:2JZ±GTE
E18 : 2JZ±GE E2:2JZ±GTE
E18 : 2JZ±GE

107
FOG LIGHT RELAY(2) 3±(2) 5 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION, DIMMER SW AT LOW POSITION AND FOG LIGHT SW ON POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1328F 326 (2JZ±GE)F 426 (2JZ±GE)
F 324 (2JZ±GTE)F 424 (2JZ±GTE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB236ENGINE ROOM MAIN WIRE AND COWL 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
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 232ENGINE ROOM MAIN WIREE1834ENGINE ROOM MAIN WIRE
3X6
7912 12 BLACK GRAY GRAY C13 F 3 F 4
SERVICE HINTS

108
LIGHT AUTO TURN OFF
2221B 2
1B 5
A 6 A 5
A 7A4
1I 16 1K 11
1J1
1K5
IEBI 2 3
50A MAIN
120A ALT
BATTERY
LIGHT CONTROL SW
[COMB. SW]
DOOR COURTESY
SW LH
HEADLIGHT
RELAY
TAI L LI GHT
RELAY7. 5A
DOME10A
GAUGE
31
2 251
13 2 112 4
1117
6 322
I20A
OFF
TAIL
HEAD INTEGRATION RELAY
C13
D10
W±B R±B R±BW±BB
R
GG± W R
W±LR±Y
W±B
R±Y
S
Q
R
S
R Q FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
21
IB 2 13
2
1
60A POWER
R±Y
R
IC2 15 2A 12
2
W

109
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 7 OF THE INTEGRATION RELAY THROUGH GAUGE
FUSE.
VOLTAGE IS APPLIED AT ALL TIMES TO TERMINAL (A) 5 OF THE INTEGRATION RELAY THROUGH THE TAILLIGHT RELAY COIL, AND
TO TERMINAL (A) 6 THROUGH THE HEADLIGHT RELAY COIL.
1. NORMAL LIGHTING OPERATION
(TURN TAILLIGHT ON)
WITH LIGHT CONTROL SW TURNED TO TAIL POSITION, A SIGNAL IS INPUT INTO TERMINAL (A) 4 OF THE INTEGRATION RELAY. DUE
TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A) 5 OF THE RELAY FLOWS TO TERMINAL (A) 4 " TERMINAL 2 OF THE
LIGHT CONTROL SW " TERMINAL 11 " TO GROUND, AND TAILLIGHT RELAY CAUSES TAILLIGHTS TO TURN ON.
(TURN HEADLIGHT ON)
WITH LIGHT CONTROL SW TURNED TO HEAD POSITION, A SIGANL IS INPUT INTO TERMINAL (A) 4 AND (A) 7 OF THE INTEGRATION
RELAY. DUE TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A) 6 OF THE RELAY FLOWS TO TERMINAL (A) 7 " TERMINAL
13 OF THE LIGHT CONTROL SW " TERMINAL 11 " TO GROUND IN THE HEADLIGHT CIRCUIT, AND CAUSES TAILLIGHT AND
HEADLIGHT RELAY TO TURN THE LIGHTS ON. THE TAILLIGHT CIRCUIT IS SAME AS ABOVE.
2. LIGHT AUTO TURN OFF OPERATION
WITH LIGHT ON AND THE IGNITION SW TURNED OFF (INPUT SIGNAL GOES TO TERMINAL 7 OF THE RELAY), WHEN THE DRIVER'S
DOOR IS OPENED (INPUT SIGNAL GOES TO TERMINAL 6 OF THE RELAY), THE RELAY OPERATES AND THE CURRENT IS CUT OFF
WHICH FLOWS FROM TERMINAL (A) 5 OF THE RELAY TO TERMINAL (A) 4 IN TAILLIGHT CIRCUIT AND FROM TERMINAL (A) 6 TO
TERMINAL (A) 7 IN HEADLIGHT CIRCUIT.
AS A RESULT, ALL LIGHTS ARE TURNED OFF AUTOMATICALLY.
HEADLIGHT RELAY
2 1± : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION (FOR USA)
: CLOSED WITH ENGINE RUNNING AND PARKING BRAKE LEVER RELEASED (FOR CANADA)
TAILLIGHT RELAY
3±5 : CLOSED WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
D10 DOOR COURTESY SW LH
3±2 : CLOSED WITH LH DOOR OPEN
I20(A) INTEGRATION RELAY
7±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
6±GROUND : CONTINUOUS WITH LH DOOR OPEN
1±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 5±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 6±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 7±GROUND : CONTINUOUS WITH LIGHT CONTROL SW AT HEAD POSITION
(A) 4±GROUND : CONTINUOUS WITH LIGHT CONTROL SW AT TA I L OR HEAD POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1328D1030I20A29
: 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)
1I
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
SYSTEM OUTLINE
SERVICE HINTS

11 0
LIGHT AUTO TURN OFF
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
BI40LEFT QUARTER PILLAR

111
TURN SIGNAL AND HAZARD WARNING LIGHT