TOYOTA SUPRA 1997 Service Repair Manual

80
ENGINE CONTROL (2JZ-GTE)
1212 1 2 12
12
9 X1011 11XX
X X 3 X XX 8 XX X X123
16XXXXXXX
XXX 5 4 X 2 X12
2 1XX3
XX
X8X X
12 X XX
XXX X
X
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50
X 41
XX
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42
6243
63X
24
44
64X
25
45
656
26
46
667
27
47
67X
28
48
XX
49
69X
51
7120
40
60
80 19
39
X
79 18
38
58
78 17
X
57
77 16
X
56
76 15
35
55
75 34
54
74 33
53
73 32
52
7220
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40 1
11
21
312
22
X13
23
334
14
24
34X
15
X6
16
26
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27
X8
38X
X
39
45
X56X 12
X82 1
342 1
34123
456 A 5
GRAYC 1
BLACKC 2
BL A CKC 3
DA R K GRA YC 9
D 1 BLACK
D 5 DARK GRAY D 8 ORANGE D17 E 1 DARK GRAY
E 3 DARK GRAY
F1 4 DARK GRAY F15 BLACK H 5 DARK GRAY H11 GRAY I 1 BLACKABLUE
C10B
C1 2
B DARK GRAY E 9A DARK GRAY E10

81
X
3123
78912 12
X
X67 8
AA AA
AAAAAAA1
5 4 3 2 1X
56
12 34
X6 781234
121234
X3 2
1567
XXX123X
X6 7 8 9X
14 15
16 17 X 19 20 21 X12
12 12 12 12 12
12123I19
J 2 M 1 BLACK P 2 GRAY
S 1 DARK GRAY S 5 BLACK S11 BLUE T 2 BLACK T 5
T 6 T14 BLACK T15 V 2 BLACK
V 3BROWN V 4BLUE V 5BLACK V 6BLUE V 7BLACK
V 8 BLUE V10 BLACKI13, I15, I17
BROWN I12, I14, I16
DARK GRAY
K 1, K 2 DARK GRAY BBLACK I 2 A BLACKI 3
(
HINT : SEE PAGE 7)

1 2
1 2
1 2
1 2 2222
22
IE EA2 322
11 9 123 11
4
COMBINATION
SW BATTERY
INTEGRATION
RELAY
HIGH B EAM
INDICATOR LIGHT
[COMB. METER]
HEADLIGHT HI RH
HEADLIGHT LO RH
HEADLIGHT HI LH
HEADLIGHT LO LH
15A
HEAD (
LH) 15A
HEAD (
RH)
C13
C12
H 2
H 4
H 1
H 3I20
W- B
W- B
R- L
R- L
R- L R- L
W- BB
R
R- L
W- B W- BR- LR- W R- YR- Y R- YR- YR
R
R- Y
R
R
W- BI 2 IB2 13
IF1 14 IB17
I 2 IB1 2
IF1 6
R- W R- W R- W
R- W
R- W
R- B
R- B R- L
E 2 : * 1
E18 : * 2
E 9 : * 1
E21 : * 2
E 2 : * 1
E18 : * 2 HEADLIGHT
RELAY
1K 5
1J 1
1
2A 150A
MAIN
13
24 2
13 14
LIGHT
CONTROL
SW DIMMER
SW
OFF
TAI L
HEAD
LOW
HIGH
FLASH
94
HEADLIGHT (USA)* 2 : 2JZ- GE * 1 : 2JZ- GTE

95
HEADLIGHT RELAY
2-1 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION OR THE DIMMER SW AT FLASH POSITION
C13 LIGHT CONTROL SW [COMB. SW]
13-1 1 : CLOSED WITH THE LIGHT CONTROL SW AT HEAD POSITION
C13 LIGHT CONTROL SW [COMB. SW]
14-9 : CLOSED WITH THE DIMMER SW AT FLASH POSITION
12-9 : CLOSED WITH THE DIMMER SW AT HIGH OR FLASH POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1228H224 (2JZ-GTE)H424 (2JZ-GTE)
C1328H227 (2JZ-GE)H427 (2JZ-GE)
H124 (2JZ-GTE)H324 (2JZ-GTE)I2029H127 (2JZ-GE)H327 (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)
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)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EA32 (2JZ-GTE)FRONT SIDE OF RIGHT FENDEREA34 (2JZ-GE)FRONT SIDE OF RIGHT FENDER
IE36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E232E2134ENGINE ROOM MAIN WIRE
E932ENGINE ROOM MAIN WIREI238COWL WIRE
E1834
X 3 2XX
9
1112 13 1412 12
12 12C12 C13 H 1 H 2
H 3H 4 I20BLACK BLACK BLACK
BROWN BROWN
34
SERVICE HINTS

2
1 1
ENERATOR PARKING
BRAKE SW BATTERYDAYTIME RUNNING
LIGHT RELAY (
MAIN) 7. 5A
DOME FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
D 6
P 5 2
Y
Y- G B
Y- G
BR- W
11 8 2152R
R- Y
W
R
R- Y
W
1
IF2 7
Y- G
II1 341B 5
1H 9
R R
CHG PKB IG +B
1H 1210A
GAUGE
22
13
2
1 24
50A MAINHEADLIGHT
RELAY
2B 1
2A 1
L
G G
96
HEADLIGHT (CANADA)

2 117 5
3
14 13
12 9 114
13 16 18COMBINA TION
SW C13R
R- W
W- BG- WW- B
G- W
R R- Y
R- YR- Y
R- Y R
R- Y
W
R- Y
E 7
IB2 10
2 1
EBI 4
I 2
I 2 DAYTIME RUNNI NG
LIGHT RELAY (
MAIN) D 6
TO THEFT DETERRENT AND
DOOR LOCK CONTROL ECU
R- Y B- W
R- W
W- B
IGIE
W- B W- B
R- L
W W
R- Y
B 2 DIODE
BRAKE FLUID
LEVEL WARNING
SWIB2 13
R- Y
4
424 1322
22
R- L
DIMMER RELA Y
(
DAYTIME RUNNING
LIGHT RELAY NO. 2)
INTEGRATION
RELAY I20
IB214
R- WI 2
W- B
W- B
1K 5
1J 1
OFF
TAI L
HEAD
LOW
FLASH
DIMMER SWLIGHT
CONTROL
SW
HIGH
OIL E HIH DRL
97

222 22
222 22
112
E 2
EA 15A
HEAD
(
LH- UPR)7. 5A
DRL15A
HEAD
(
RH- UPR)15A
HEAD
(
RH - LW R)15A
HEAD
(
LH- LWR)
HEADLIGH
LO RHHEADLIGHT
LO LH H 4 H 3 R
R- W
R
R
R R- W
R- B R- Y
R- B W- B W- B
W- B
111 11 222 22E 7
E 7
E 2E 2
1 2
1 2
B 1B3
B 2B4A1A5A2
A3
3 2IB1 2
IF1 6
E 2IF1 14
EA EB I E
TO FOG LIGHT
RELAY W- B
W- B
W- BW- B
W- B
W- B
R- WR- L
R- BR- L R
W- B
IB5 13
W- B
R- L R- W R- W R- WR- L
R- B
R- Y
R- W
R- Y
W- B
W- BHIGH BEAM
INDICATOR LIGHT
[COMB. METER] DAYTIME RUNNING
LIGHT RELAY NO. 3 HEADLIGHT
HI LHHEADLIGHT
HI RH
C12 H 1 H 2R- W
R- W
R- W
B D 2 , D 3A
R- B
E 2
2
T
98
HEADLIGHT (CANADA)

99
VOLTAGE IS ALWAYS APPLIED FROM THE MAIN FUSE, THROUGH THE HEADLIGHT RELAY (COIL SIDE) TO
TERMINAL 5 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN), TERMINAL 6 OF THE INTEGRATION RELAY,
TERMINAL 14 OF THE DIMMER SW, DIMMER RELAY (DAYTIME RUNNING LIGHT RELAY NO. 2) (COIL SIDE), TO
TERMINAL 17 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN). WHEN THE IGNITION SW IS TURNED ON, VOLTAGE
FROM THE GAUGE FUSE IS APPLIED TO TERMINAL 2 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN).
1. DAYTIME RUNNING LIGHT OPERATION
WHEN THE ENGINE STARTS, VOLTAGE FROM TERMINAL `L' OF THE GENERATOR IS APPLIED TO TERMINAL 11 OF
THE DAYTIME RUNNING LIGHT RELAY (MAIN). IF THE PARKING BRAKE LEVER IS PULLED UP (PARKING BRAKE SW
ON) AT THIS TIME, THE DAYTIME RUNNING LIGHT SYSTEM DOES NOT OPERATE. WHEN THE PARKING BRAKE IS
RELEASED (PARKING BRAKE SW OFF), A SIGNAL IS OUTPUT FROM TERMINAL 1 OF THE PARKING BRAKE SW TO
TERMINAL 8 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN). THIS ACTIVATES THE DAYTIME RUNNING LIGHT
RELAY (MAIN), TURNING ON THE DIMMER RELAY (DAYTIME RUNNING LIGHT RELAY NO. 2). CURRENT ALSO FLOWS
FROM THE MAIN FUSE TO THE DIMMER RELAY (DAYTIME RUNNING LIGHT RELAY NO. 2) (POINT SIDE) " HEAD
(LH-UPR) FUSE " HEADLIGHT HI LH " HEADLIGHT HI RH " TERMINAL (A)5 OF THE DAYTIME RUNNING LIGHT
RELAY NO. 3 " TERMINAL (A)3 " GROUND, CAUSING THE HEADLIGHTS TO LIGHT UP AT APPROX. 20% OF THEIR
NORMAL BRIGHTNESS.
ONCE THE DAYTIME RUNNING LIGHT RELAY (MAIN) HAS BEEN ACTIVATED AND THE HEADLIGHTS LIGHT UP, THE
HEADLIGHTS REMAIN ON EVEN IF THE PARKING BRAKE LEVER IS ENGAGED AGAIN (PARKING BRAKE SW ON).
2. HEADLIGHT OPERATION
WHEN THE LIGHT CONTROL SW IS AT HEAD POSITION AND THE DIMMER SW AT LOW POSITION, CURRENT FLOWS
FROM THE HEADLIGHT RELAY (COIL SIDE) TO TERMINAL 3 OF THE INTEGRATION RELAY " TERMINAL 4 "
TERMINAL 13 OF THE LIGHT CONTROL SW " TERMINAL 11 " GROUND, ACTIVATING THE HEADLIGHT RELAY.
THIS CAUSES THE CURRENT TO FLOW FROM THE HEADLIGHT RELAY (POINT SIDE) TO THE HEAD LWR FUSE "
HEADLIGHT LO " GROUND, CAUSING THE HEADLIGHTS TO LIGHT UP AT NORMAL BRIGHTNESS. SIMUTANEOUSLY,
CURRENT FLOWS FROM THE DRL FUSE " DAYTIME RUNNING LIGHT RELAY NO. 3 (COIL SIDE) " GROUND,
ACTIVATING RELAY NO. 3.
WHEN THE DIMMER SW IS AT HIGH POSITION, TERMINAL 12 OF THE DIMMER SW OUTPUTS A SIGNAL TO
TERMINAL 16 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN) TO ACTIVATE IT. THIS TURNS ON DIMMER RELAY
(DAYTIME RUNNING LIGHT RELAY NO. 2). SO CURRENT FLOWS FROM THE DIMMER RELAY (DAYTIME RUNNING
LIGHT RELAY NO. 2) (POINT SIDE) TO THE HEAD (LH-UPR) FUSE " HEADLIGHT HI LH " DAYTIME RUNNING LIGHT
NO. 3 (POINT SIDE) " GROUND, AND FROM THE HEAD (RH-UPR) FUSE " DAYTIME RUNNING LIGHT RELAY NO. 3
(POINT SIDE) " HEADLIGHT HI RH " DAYTIME RUNNING LIGHT RELAY NO. 3 (POINT SIDE) " GROUND, CAUSING
THE HEADLIGHTS TO OPERATE AT HI.
WHEN THE DIMMER SW IS AT FLASH POSITION, CURRENT FROM THE HEADLIGHT RELAY (COIL SIDE) FLOWS TO
TERMINAL 14 OF THE DIMMER SW " TERMINAL 9 " GROUND, ACTIVATING THE RELAY. SIMULTANEOUSLY,
CURRENT FROM THE HEADLIGHT RELAY (POINT SIDE) FLOWS TO HEADLIGHT LO, LIGHTING UP HEADLIGHT LO
AND ACTIVATING DAYTIME RUNNING LIGHT RELAY NO. 3. THEN TERMINAL 12 OF THE DIMMER SW OUTPUTS A
SIGNAL TO TERMINAL 16 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN), ACTIVATING THE DAYTIME RUNNING
LIGHT RELAY (MAIN) SO THAT CURRNET FLOWS TO HEADLIGHT HI LIKE IT DOES FOR HIGH POSITION. THIS
CAUSES ALL HEADLIGHTS TO LIGHT UP.
D6 DAYTIME RUNNING LIGHT RELAY (MAIN)
15-GROUND : ALWAYS APPROX. 12 VOLTS
2-GROUND : APPROX. 12 VOLTS WITH TEH IGNITION SW AT ON POSITION
13-GROUND : ALWAYS CONTINUITY
5-GROUND : APPROX. 12 VOLTS WITH THE DAYTIME RUNNING LIGHT SYSTEM
DOES NOT OPERATE OR THE LIGHT CONTROL SW AT OFF OR TAIL POSITION
(WHEN THE CONNECTOR IS DISCONNECTED, ALWAYS APPROX. 12 VOLTS)
8-GROUND : CONTINUITY WITH THE PARKING BRAKE LEVER RELEASED
SYSTEM OUTLINE
SERVICE HINTS

100
HEADLIGHT (CANADA)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B224 (2JZ-GTE)D628H424 (2JZ-GTE)
C1228G224 (2JZ-GTE)I2029
C1328H124 (2JZ-GTE)P529
D2A24H224 (2JZ-GTE)
D3B24H324 (2JZ-GTE)
: 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)
1H
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
()
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2B22ENGINE ROOM MAIN AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: 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)
IB536ENGINE ROOM MAIN WIRE AND COWL WIRE (RIGHT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EA32 (2JZ-GTE)FRONT SIDE OF RIGHT FENDER
EB32 (2JZ-GTE)FRONT SIDE OF LEFT FENDER
IE36LEFT KICK PANEL
IG36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E232ENGINE ROOM MAIN WIREI238COWL WIREE732ENGINE ROOM MAIN WIREI438COWL WIRE

101
X 3 2XX
9
1112 13 141
X
5 2
3
X
12
34X2 XX 5 X X8
X X 11 X 13 X 15 16 17 18112
12 12 12
1AGRAY D 2
BGRAY D 3C1 2 C 13
D 6 G 2 H 1
H 2 H 3 H 4 I20 P 5GRAY BLACK BLACK
BLACK BROWN BROWNBLACK
12B 2GRAY
34