TOYOTA SUPRA 1997 Service Repair Manual

B 5
1 2
2 3
1 2
1 2
OFF
TAI L
HEAD 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 1
2 2
1
G
INTEGRATION
RELAY
LIGHT CONTROL SW
[COMB. SW] C13
BATTERY
LICENSE PLATE
LIGHT L 160A POWER 120A ALT
PAR IGHT
FRO DE
MA LIGHT
RH LH 1
1 2
2
2A 1
E 2 : 2JZ- GTE
E18 : 2J Z- GE
P13 F 6
E 2 : 2JZ- GTE
E18 : 2JZ- GE
W- B
I20
2 2
W
E 2 : 2JZ- GTE
E18 : 2JZ- GE
W- B
W- B
23 1510A
TAI L
1 2
1A 31C16 1K 11 1B2
TAILLIGHT
RELAY
DIODE
KING L
NT SI
RKER RH LH F 8 F 5
1J 11K 5
102
TAILLIGHT

B 4
B 8
B 6
B 4 B 7
B 3
BI BJ18
IE1 5
1 2
1 2FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
G G
G W- B
W- B
G
Y
V V LG LG
LG W- B
W- B
W- B W- B
G
W- BW- B
W- B
55 11 L 2
REAR LIGHT
WARNING LIGHT
[ TEL LT ALE
LIGHT RH] T 6 TA
[RREAR SIDE
MAR KER LI GH T
LH R11
W- B
Y
G
B 4
B 5
W- B
W- B
W- B W- B
W- B
10A
GAUGE
1C 21E12
ILLIGHT
EAR COMB. LIGHT]
RH LH R 9 R10
DELAY
CIRCUIT
-
+
911 384LIGHT FAILURE SENSOR
1
RH R12
103

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, AND 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 THE LIGHT CONTROL SW AT TAIL OR HEAD POSITION
L2 LIGHT FAILURE SENSOR
4,8-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
3-GROUND : APPROX. 12 VOLTS WITH THE LIGHT CONTROL SW AT TAIL OR HEAD POSITION
11-GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1328F826 (2JZ-GE)R930
F524 (2JZ-GTE)I2029R1030F526 (2JZ-GE)L130R1130
F624 (2JZ-GTE)L230R1230F626 (2JZ-GE)P1324 (2JZ-GTE)T629
F824 (2JZ-GTE)P1326 (2JZ-GE)
: 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
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)
SYSTEM OUTLINE
SERVICE HINTS

105
: 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
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E232ENGINE ROOM MAIN WIREB5
E1834ENGINE ROOM MAIN WIREB640FLOOR NO 2 WIREB340FLOOR NO 2 WIREB740FLOOR NO. 2 WIRE
B440FLOOR NO. 2 WIREB8
2X
1112 12
1 2
1 X
51 X
512
121
XXX18 C13 F 5 F 6
L 1R 9 R10 R11
R12 T 6BLACK GRAY GRAY
GRAYGRAY
GRAYX 4 3 X
X89X11XL 22 3
12 F 8GRAYI20
12P13GRAY

15A
HEAD(
LH- LWR)
(
CANADA) 15A
HE AD (
LH)
(
USA)15A
FOG
25 13
IB2 15
IE EB EA1 2
1 2 22 22
22
9 12
3 7 6 21
G- W G- R
BR
W- B
W- B
W- BG- W
G- W OO R-B
FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
FOG LI GHT
RELAY
FOG L IGHT SW
[COMB. SW] C13FRONT FOG
LIGHT RH FRONT FOG
LIGHT LHF 3
F 4 E 2 : 2JZ- GTE
E18 : 2JZ- GE
W- B
W- B
W- BE 2 : 2JZ- GTE
E18 : 2JZ- GE E 2 : 2 JZ - GTE
E18 : 2JZ- GE
W- B W- B
(
CANADA)(
CA NA DA) (
USA)
OFF
FOG
LOW
1K 5
1J 1
106
FOG LIGHT

107
FOG LIGHT RELAY
(2)3-(2)5 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION, DIMMER SW AT LOW POSITION AND THE
FOG LIGHT SW ON POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1328F326 (2JZ-GE)F426 (2JZ-GE)
F324 (2JZ-GTE)F424 (2JZ-GTE)
: 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)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1K20COWL 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)
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
E232ENGINE ROOM MAIN WIREE1834ENGINE ROOM MAIN WIRE
3X6
79BLACK GRAY GRAY C13 F 3 F 4
12 12
SERVICE HINTS

2
A 3 A 2
A 4A1
IEBI 2 3 BATTERY
LIGHT CONTROL SW
[COMB. SW]
DOOR COURTESY
SW LH 7. 5A
DOME10A
GAU GE
13 2
117 2
I20 A
INTEGRATION RELAY
C13
D10
W- B R- B R- BW- BB
R
GG- W R
W- LR- Y
W- B
R- Y
FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
21
IB2 13
2
A POWER
R- Y
R
IC2 15
1B 2
1K 11TA IL LI GHT
RELAY 51
32
22
50A MAIN
120A ALTHEADLIGHT
RELAY
31
2 2
112 41
60
2A 12
2
W
OFF
TAIL
HEAD
1J1
1K5
1I 166
1B 5
1
108
LIGHT AUTO TURN OFF

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) 2 OF THE INTEGRATION RELAY
THROUGH THE TAILLIGHT RELAY COIL SIDE, AND TO TERMINAL (A) 3 THROUGH THE HEADLIGHT RELAY COIL
SIDE.
1. NORMAL LIGHTING OPERATION

WITH THE LIGHT CONTROL SW TURNED TO TAIL POSITION, A SIGNAL IS INPUT INTO TERMINAL (A) 1 OF THE
INTEGRATION RELAY. DUE TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A) 2 OF THE RELAY FLOWS TO
TERMINAL (A) 1 " TERMINAL 2 OF THE LIGHT CONTROL SW " TERMINAL 11 " TO GROUND, AND TAILLIGHT
RELAY CAUSES TAILLIGHTS TO TURN ON.

WITH THE LIGHT CONTROL SW TURNED TO HEAD POSITION, A SIGNAL IS INPUT INTO TERMINALS (A) 1 AND (A) 4
OF THE INTEGRATION RELAY. DUE TO THIS SIGNAL, THE CURRENT FLOWING TO TERMINAL (A) 3 OF THE RELAY
FLOWS TO TERMINAL (A) 4 " 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 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) 2 OF THE RELAY TO TERMINAL (A) 1 IN TAILLIGHT
CIRCUIT AND FROM TERMINAL (A) 3 TO TERMINAL (A) 4 IN HEADLIGHT CIRCUIT.
AS A RESULT, ALL LIGHTS ARE TURNED OFF AUTOMATICALLY.
HEADLIGHT RELAY
2-1 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION OR THE DIMMER SW AT FLASH POSITION (USA)
: CLOSED WITH THE ENGINE RUNNING AND THE PARKING BRAKE LEVER RELEASED (CANADA)
TAILLIGHT RELAY
3-5 : CLOSED WITH THE LIGHT CONTROL SW AT TAIL OR HEAD POSITION
D10 DOOR COURTESY SW LH
3-2 : CLOSED WITH THE LH DOOR OPEN
I20 (A) INTEGRATION RELAY
7-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
6-GROUND : CONTINUITY WITH THE LH DOOR OPEN
1-GROUND : ALWAYS APPROX. 12 VOLTS
(A)2-GROUND : ALWAYS APPROX. 12 VOLTS
(A)3-GROUND : ALWAYS APPROX. 12 VOLTS
(A)4-GROUND : CONTINUITY WITH THE LIGHT CONTROL SW AT HEAD POSITION
(A)1-GROUND : CONTINUITY WITH THE LIGHT CONTROL SW AT TAIL 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)
SYSTEM OUTLINE
SERVICE HINTS

11 0
LIGHT AUTO TURN OFF
: 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
()
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)
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
2X
111323 D10 C13BLACKA I2 0
1234

111
TURN SIGNAL AND HAZARD WARNING LIGHT