TOYOTA SUPRA 1997 Service Repair Manual

1 21 2
2 1
1 2
E28 E28
IEIJ1 11
IJ 2 12 IJ2 3A 4 A 20
B 24 B46 A3A18 B25 B7
3 12 8
4 OIL THG KD M G2 G-
W- B W- BB- R
O
BR- Y W- B W- B
W- B W- B
W- B
G- Y
W
GG- YY
G- W G- W WB- R
Y- L
(
SHIELDED)(
SHIELDED) STP TE1FROM P OWER SOURCE SYSTEM (
SEE PAGE 56)
STOP LIGHT
SW DA TA L INK
CONNECTOR 1
S11 D 1
Y A/T FLUID TEMP. SENSOR
EGR GAS TEMP. SENSOR
KICK DOWN SWA 5
E 1
K 4
ELECTRONICALLY CONTROLLED
TRANSMISSION PATTERN
SELECT SW E 8 ENGINE CONTROL MODULEA E 9 , E10B
B 26G1
R
B 27NE
B
1234
DISTRIBUTOR D 4
BR A 32PS
1 2
BR- W BRPOWER STEERING
PRESSURE SW P 3
B 65
W- B
E2
1J 11H 13
NORMAL
MANUAL
NE G1 G2 G-
TE1 +B
15A
STOP
1I 10
152
ELECTRONICALLY CONTROLLED TRANSMISSION

I14
I17
EDII1 5II138 II111 A 9A10
B 69 B80 B79 A28 A25 A2
A65
A1
V W- LL- R G- BL- YY
P W- LV BR BR
BR BR
BR
BR
BR
P W- LV
P
L- RYYY G- BL- Y (
SHIELDED)
MI
OD2 EO2 EO1 E12L
JUNCTION
CONNECTOR J 2
FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
ODO AN D
TR I P
TELLTALE
LIGHT RH T 6ENGINE CONTROL MODULEA E 9 , E10B
E28 BR BRIJ2 11
LG-B LG-B
FROM CRUISE CONTROL
ECU
A 12
OD 1
IJ2 7G- R
G- R
2
CRUISE CONTROL ECU C16
SP1
G- R
B 78 E03
BRBR
10A
GA UGE
1E 12
D
153
AND A/T INDICATOR (2JZ-GE)

78109234
I2 1 I1 4I1 7 E28 I14 I1 4E2 8
II1 7II136 II11II118 II11 7 II127
IF 3 1 II1 2 II1 8II1 23
4 2
IE IH
S P EED
B 9A1A4A10 A6A7A8A11
B 11 B10 A12 A2A13
A 3 21
A L- Y
G- R Y
L- Y
G- R
L- R
W- L
V
V
V L- RY Y
W- B
W- BV
W- BV
W- BW- LRL- RR
L- RR
Y
G- BL- Y G- RL R- B G- W
G- BL- Y G- RL R- B G- W Y Y
Y Y
G- W
R- B
L
G- R
L- Y
G- BY YY
Y
A/T INDICATOR LIGHT SW
[P ARK/NE UTR AL P O S ITION S W] P 2
VE HIC LE S P EE D S E NS O R NO . 1
(
CO MBINATIO N METE R) V1 0
J UNC TION
CONNECTOR
O/D MAIN
SW O 5J 1
O/D OFFMANUPRND2 L
C O MBINATIO N ME TE RA C10 , C11 , C12
B
IFC 11
BRBR
C E28 G- B G- B
PRND2 L
154
ELECTRONICALLY CONTROLLED TRANSMISSION

155
AND A/T INDICATOR (2JZ-GE)
THIS SYSTEM ELECTRICALLY CONTROLS THE LINE PRESSURE, THROTTLE PRESSURE, LOCK-UP PRESSURE AND
ACCUMULATOR PRESSURE ETC. THROUGH THE SOLENOID VALVE. THE ELECTRONICALLY CONTROLLED
TRANSMISSION IS A SYSTEM WHICH PRECISELY CONTROLS GEAR SHIFT TIMING AND LOCK-UP TIMING IN
RESPONSE TO THE VEHICLE'S DRIVING CONDITIONS AND THE ENGINE OPERATING CONDITIONS DETECTED BY
VARIOUS SENSORS, MAKING SMOOTH DRIVING POSSIBLE BY SHIFT SELECTION FOR EACH GEAR WHICH IS THE
MOST APPROPRIATE TO THE DRIVING CONDITIONS AT THAT TIME, AND CONTROLS THE ENGINE TORQUE DURING
SHIFTING TO ACHIEVE OPTIMUM SHIFT FEELING.
1. GEAR SHIFT OPERATION
WHEN DRIVING, THE ENGINE WARM UP CONDITION IS INPUT AS A SIGNAL TO TERMINAL (B) 44 OF THE ENGINE
CONTROL MODULE FROM THE ENGINE COOLANT TEMP. SENSOR AND THE VEHICLE SPEED SIGNAL FROM
VEHICLE SPEED SENSOR NO. 2 IS INPUT TERMINAL (B) 23 OF THE ENGINE CONTROL MODULE. AT THE SAME
TIME, THE THROTTLE VALVE OPENING SIGNAL FROM THE THROTTLE POSITION SENSOR IS INPUT TO TERMINAL
(B) 43 OF THE ENGINE CONTROL MODULE AS THROTTLE ANGLE SIGNAL.
BASED ON THESE SIGNALS, THE ENGINE CONTROL MODULE SELECTS THE BEST SHIFT POSITION FOR DRIVING
CONDITIONS AND SENDS CURRENT TO THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS.
WHEN SHIFTING TO 1ST SPEED, THE CURRENT FLOWS FROM TERMINAL (B) 10 OF THE ENGINE CONTROL
MODULE  TERMINAL 1 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID .  GROUND AND
CONTINUITY TO NO. 1 SOLENOID CAUSES THE SHIFT (NO. 2 SOLENOID DOES NOT HAVE CONTINUITY AT THIS
TIME.)
FOR 2ND SPEED, THE CURRENT FLOWS SIMULTANEOUSLY FROM TERMINAL (B) 9 OF THE ENGINE CONTROL
MODULE  TERMINAL 2 OF ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID  GROUND, AND
FROM TERMINAL (B) 10 OF THE ENGINE CONTROL MODULE  TERMINAL 1 OF THE ELECTRONICALLY
CONTROLLED TRANSMISSION SOLENOID  GROUND, AND CONTINUITY TO NO. 1 AND NO. 2 SOLENOIDS
CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUITY TO NO. 1 SOLENOID, ONLY TO NO. 2 SOLENOID, CAUSING THE SHIFT.
SHIFTING INTO THE 4TH SPEED (OVERDRIVE) OCCURS WHEN NO CURRENT FLOWS TO NO. 1 AND NO. 2
SOLENOIDS.
2. LOCK-UP OPERATION
WHEN THE ENGINE CONTROL MODULE JUDGES FROM EACH SIGNAL THAT LOCK-UP OPERATION CONDITIONS
HAVE BEEN MET, THE CURRENT FLOWS FROM TERMINAL (B) 8 OF THE ENGINE CONTROL MODULE  TERMINAL
3 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID GROUND, CAUSING CONTINUITY TO
THE LOCK-UP SOLENOID AND CAUSING LOCK-UP OPERATION.
3. STOP LIGHT SW CIRCUIT
IF THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) WHEN DRIVING IN LOCK-UP CONDITION, A SIGNAL IS
INPUT TO TERMINAL(A) 4 OF THE ENGINE CONTROL MODULE. THE ENGINE CONTROL MODULE OPERATES AND
CUTS THE CURRENT TO THE SOLENOID TO RELEASE LOCK-UP.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (SW POINT IS OPEN), A SIGNAL IS INPUT TO TERMINAL (A) 28 OF THE
ENGINE CONTROL MODULE AND THE ELECTRONICALLY CONTROLLED TRANSMISSION CAUSES SHIFT TO
OVERRIDE WHEN THE CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED OFF (SW POINT IS CLOSED). THE CURRENT FLOWING THROUGHTHE O/D
OFF INDICATOR LIGHT FLOWS TO GROUND BY WAY OF THE O/D MAIN SW AND CAUSES THE O/D OFF INDICATOR
LIGHT TO LIGHT UP. AT THE SAME TIME, A SIGNAL IS INPUT TO TERMINAL (A) 28 OF THE ENGINE CONTROL
MODULE AND THE ELECTRONICALLY CONTROLLED TRANSMISSION PREVENTS SHIFT INTO OVERDRIVE.
5. ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
WHEN THE ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW IS SWITCHED FROM NORMAL
TO MANUAL, A SIGNAL IS INPUT TO TERMINAL (A) 18 OF THE ENGINE CONTROL MODULE. INPUT OF THIS SIGNAL
CAUSES CURRENT TO FLOW FROM THE GAUGE FUSE TO TERMINAL (A) 1 OF THE COMBINATION METER 
TERMINAL (A) 12 TERMINAL (A) 25 OF THE ENGINE CONTROL MODULE  GROUND, LIGHTING UP THE
INDICATOR LIGHT. IF THE A/T SHIFT LEVER IS THEN SHIFTED TO 2º POSITION, THE ENGINE CONTROL MODULE
ENABLES THE VEHICLE TO START OFF WITH THE TRANSMISSION IN 2ND GEAR, THUS PERMITTING EASING
STARTING OFF AND DRIVING ON SLIPPERY ROADS.
6. CRUISE CONTROL
WHEN CRUISE CONTROL OPERATION IS SELECTED A SIGNAL IS INPUT TO TERMINAL (A) 12 OF THE ENGINE
CONTROL MODULE FROM CRUISE CONTROL ECU. AS A RESULT, THE ENGINE CONTROL MODULE OPERATES AND
CONTROLS OVERDRIVE, LOCK-UP AND SO ON FOR SMOOTH DRIVING.
SYSTEM OUTLINE

156
ELECTRONICALLY CONTROLLED TRANSMISSION
E2 ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID
1, 2, 3-GROUND:EACH 11-15W
E 3 ENGINE COOLANT TEMP. SENSOR
4-7 K 0
C32
F)
2-3 K20
C68
F)
0-9.3 K40
C 104
F)
0-4.7 K60
C140
F)
0-2.4 K80
C176
F)
E 9 (B), E10 (A) ENGINE CONTROL MODULE
BATT-E1:AL WAYS 9-14 VOLTS
IGSW-E1:9-14 VOLTS WITH THE IGNITION SW ON
+B-E1:9-14 VOLTS WITH THE IGNITION SW ON
IDL1-E1:0-1.5 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
:9-14 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
VTA1-E1:0.3-0.8 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
3.2-4.9 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
STA-E1:6-14 VOLTS WITH THE ENGINE CRANKING
M-REL-E1:9-14 VOLTS WITH THE IGNITION SW ON
VCC-E1:4.5-5.5 VOLTS WITH THE IGNITION SW ON
L-E1: 7.5-14 VOLTS WITH THE SHIFT LEVER AT Lº POSITION
2-E1: 7.5-14 VOLTS WITH THE SHIFT LEVER AT 2º POSITION
V11 VEHICLE SPEED SENSOR NO. 2 (ELCTRONICALLY CONTROLLED TRANSMISSION)
1-2:APPROX. 620
E 8 ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW
4-3 :CLOSED WITH THE ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW AT MANUAL
POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A426(2JZ-GE)E 326(2JZ-GE)0 529
C10B28E 829P 227(2JZ-GE)
C11A28E 9B29P 327(2JZ-GE)
C12C28E10A29S1129
C1628I1929T 227(2JZ-GE)
D 126(2JZ-GE)J 129T 629
D 426J 229V1027(2JZ-GE)
E 126(2JZ-GE)K 429V1127(2JZ-GE)
E 226(2JZ-GE)M 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)
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)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA134(2JZ-GE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA334ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF336INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT KICK PANEL)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ138ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
SERVICE HINTS

157
AND A/T INDICATOR (2JZ-GE)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB34(2JZ-GE)FRONT SIDE OF LEFT FENDER
ED34(2JZ-GE)REAR SIDE OF INTAKE MANIFOLD
IE36LEFT KICK PANELIF36LEFT KICK PANEL
IH36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E20I1438INSTRUMENT PANEL WIRE
E2334ENGINE WIREI1738ENGINE WIRE
E2634ENGINE WIREI2138INSTRUMENT PANEL WIRE
E28
129 X101113 X 8 7 6 X 4 2 1 101112
11 XXX
X8X X
12 X XX
123 4
21
1
3 22 1
34 BBLUE C10ABROWN C11 A 5
C C12D 1
D 4 E 1 E 2 E 3E 8 GRAY
BL AC K
BLACK DARK GRAY BLACKX
GREEN X2
XXX
XC16 GREEN
XX
XXX
X X X
XX XX

158
ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T
INDICATOR (2JZ-GE)
10
X
X X
X
41
XX
X3
23
43
X24
44
6425
45
6526
667
27
X8
X9
X
69X
X
XX
X
80 X
79 X
78 X
77 X
76 X X
X X
X X
X10
20
X 1
X
312
323
X
334
X
24X
25X
XX
X
X
X18
28
X9
X
X
X
A AAA
AA AAAA AA
AAAAAA A
2
4X
756234
891012
1234
156
XXX123 B DARK GRAY E 9A DARK GRAY E10
I19 J 1 J 2 K 4
O 5 P 2 S11
T 2 T 6 V10BLACK
BLUE GRAY BLUE
BLACKBLACK (
HINT : SEE PAGE 7)(
HI NT : SEE PAGE 7) 4612
V11 BLACK 12 5 4 3 2 1M 1 BLACKP 3 DARK GRAY X
X28
X
12
12 X
X678X
X

159
ABS (W/O TRACTION CONTROL)

A 1B2B4
A 2A4A3B1B5B6
IB6 2IB6 13
IB6 1IF1 11 IJ1 15 II121 IJ116
A 9A4A10 A21 A11 A22 A2A13 A 7A8A18 E18
I 4
IG EAA 4A2A3B2B1B4B5B8
M
A 1B 8 2EA16
DATA LINK
CONNECTOR 1
MR R+ SR TS
MT SFRH SFLH SRH SFLR AST GND1 GND2
ABS ACTUATORD 1 60A
ABS NO. 1 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
R
V
V- W
L- B
L- W
W- B
Y
R
L P- B Y L- B V- WV G- W
Y
B- Y
P
B- R
P- L P- L
W- B
W- BB- RP B- YY G- WL- W
L W- B
W- B
RL L
L- W
W- BRB-RB- R R
W- B16 11 2223 2
ABS RELAYB A 8 , A 9A
ABS ECUA A18 , A19B
IB6 6IB57IB58IB59IB54IB55
BS BM MT SFRH SFLH SRH SFLR AST
GND
B A 6 , A 7A 1
R
+BM +BSW
BM MR R+ SR BS GND
A 1
B 6
Y- R Y- R
IB5 3
SF RRSFRR
A 16
A 5
Y- G Y- G
IB6 5SRR
SRR
(
SHIELDED)
I 9
W- B
TS TC WAWB(
SHORT PIN)
160
ABS (W/O TRACTION CONTROL)

1 2
I 9
I 2 4 2
B 4B 9B11 B 2B12
A 3A14 A19 A20 B1B7B3B10
IB5 1IB52IB24IB25IC23
1 2
1 2
2 1
2 1IC2 8
ABS SPEED SENSOR
REAR LH ABS SPEED SENSOR
FRONT LH ABS SPEED SENSOR
FRONT RH
ABS SPEED SENSOR
REAR RH
STP IG1 D/GTC WA
FR+ FR- FL+ FL- RR+ RR- RL+ RL-
ABS WARNING LIGHT
[TELLTALE LIGHT LH]
STOP LIGHT SW
DATA LINK CONNECTOR 2 D 5
S11T 5 A1 1
A1 0
A3 2
A31
RL
LG- BB- R
WY
G- W
LGV
LGV PL B W
B W L R
L R
RL
B- R
L
R14 4 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
ABS ECUA A18 , A19B IF2 12
L
ED IJ1 18
BR BR
3
BR (
SHIELDED)
10A
ECU- I G15A
STOP 10A
GAUGE
1K 13 1I10 1E 12
TC ABS THA
161