1997 TOYOTA SUPRA traction control

F03408
Throttle Control ECU
12V
Tc
R R
R P-B DLC1
Tc E1 BR
BR
BR
BRDLC2
E1Tc
3 11
21
11 3
18
ED3
4
IJ1II1
IF1
T16 P-B
S-17-1F02201F03525
DLC2DLC1
E
1
TcE1
Tc
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-553
781 Author
: Date
:
1997 SUPRA (RM502U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting terminals Tc and E1 of DLC1 or DLC2, the ECU displays the DTC by blinking the TRAC OFF
indicator light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC2 or DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC2 or
DLC1.
OK:
Voltage: 10 - 14 V
OK Proceed to next circuit inspection shown on
problem symptoms chart (See page DI-508).
NG
DI4WC-01

DI-554
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
782 Author
: Date
:
1997 SUPRA (RM502U)
2 Check for open and short in harness and connector between throttle control
ECU and DLC2 or DLC1, DLC2 or DLC1 and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace throttle control ECU.

16
ABBREVIATIONS D
ABBREVIATIONS
The follow abbreviations are used in this manual.
ABS = Anti-Lock Brake Systerm O/D = Overdrive
A/C = Air Conditioning PPS = Progressive Power Steering
ACIS = Acoustic Control Induction System R/B = Relay Block
A/T = Automatic Transmission RH = Right-Hand
COMB. = Combination SFI = Sequential Multiport Fuel Injection
ECU. = Electronic Control Unit SRS = Supplemental Restraint System
EGR = Exhaust Gas Recirculation SW = Switch
ESA = Electronic Spark Advance TEMP. = Temperature
EVAP = Evaporative Emission TRAC = Traction Control
J/B = Junction Block VSV = Vacuum Switching Valve
LH = Left-Hand w/ = With
M/T = Manual Transmission w/o = Without
* The titles given inside the components are the names of the terminals (terminal codes) and are not treated
as being abbreviations.

29
G
Position of Parts in Instrument Panel
O 5 O/D Main SW and A/T Indicator Illumination
P 4 PPS ECU
P 5 Parking Brake SW
R 4 Radio and Player (w/o Stereo Power Amplifier)
R 5 Radio and Player (w/o Stereo Power Amplifier)
R 6 Radio and Player (w/ Stereo Power Amplifier)
R 7 Remote Control Mirror SW
R 8 Rheostat
S 6 Seat Heater SW
S 7 Shift Lock ECU
S 8 Stereo Power Amplifier
S 9 Stereo Power Amplifier
S10 Stereo Power Amplifier
S11 Stop Light SW
S16 Sub Heated Oxygen Sensor (Bank 1 Sensor 2)
T 5 Telltale Light LH
T 6 Telltale Light RH
T 7 Theft Deterrent and Door Lock Control ECU
T 8 Traction Control SW
T13 Theft Deterrent and Door Lock Control ECU
T15 Throttle ECU
T16 Throttle ECU
U 1 Unlock Warning SW E 8 Electronically Controlled Transmission Pattern
Select SW
E 9 Engine Control Module
E10 Engine Control Module
E11 Engine Coolant Temp. Sensor (A/C System)
F10 Front Tweeter (Speaker) LH
F11 Front Tweeter (Speaker) RH
G 3 Glove Box Light
G 4 Glove Box Light SW
H10 Hazard SW
H11 Heated Oxygen Sensor (Bank 1 Sensor 2)
H12 Heater Control SW
H13 Heater Control SW
I18 Ignition Key Cylinder Light
I19 Ignition SW
I20 Integration Relay
J 1 Junction Connector
J 2 Junction Connector
K 4 Kick Down SW
N 2 Noise Filter

STEREO POWER
AMPLIFIER
RADIO AND PLAY ER
BLOWER MOTOR
CONTROL RELAY
SEAT HEATER RELAY
(
PASSENGER' S SEAT)
SEAT HEATER
(
PASSENGER' S SEAT)
BUCKLE SW RH
DOOR COURTESY SW RH
HIGH BEAM INDICATOR
LIGHT [COMB. METER]
TRACTION CONTROL SW
SHIFT LOCK ECU
ELECTRONICALLY
CONTROLLED
TRANSMISSION
PATTERN SELECT SW
O/D MAIN SWSEAT HEATER SW
DA YTIME RUNNING
LIGHT RELAY (
MAIN) (
EP)
(
GND)
HE ATE R CONTROL SW
CI GARETTE LI GHTER
CL O CK
AU TO AN TENNA
CONTROL RELAY GLOVE BOX LIGHT SW
THEFT DETERRENT
AND DOOR LOCK
CONTROL ECU
PPS ECU
DOOR LOCK CONTROL
SW RH RE MOTE CONTROL
MIRROR AND MIRROR
HE A TE R RH
DOOR LOCK MOTOR AND
DOOR UNL OCK
DE TECTION S W RH DOOR KEY LOCK AND
UNLOCK SW RH IG
IH I24 I24 I23
I23
I 2
I11
I10I21
B 2 B 2 I25
B 2 IL116 IF311
IK11
IF114
I18
I18IF
I14(
E2)
(
VER1)COMBINATION
METER
A/C
AMPLIFIER
W- B
(
*2)W- B
(
*1)
W- B
(
*2)
W- B
(
*1)
W- B
(
*3)
W- B
(
A/T)
W- B
(
*1)
W- B
(
*1) W- B
(
*1)W- B
(
*1)W- B
(
*1) W- B
(
*1)
W- B
(
*1)
W- BW- B
W- B W- BR- L W- B W- B W- B
W- B W- B W- B W- B W- B W- BW- B
W- BW- B
W- B W- B W- B W- B W- B W- B W- B W- B
W- B
W- B BR BR BR
A
A
A
A
A
A A
A
W- B W- BW- B
W- B W- B
W- B W- B W- B
JUNCTION
CONNECTOR J 1
I11 : * 3
I 4 : * 4 (
*1)(
*1) (
*6)
(
GND)
(
GND)ABS ECU
W- BW- B
(
A/T)
(
A/T)
DA TA LI NK
CONNECTOR 3 W- B I 3
I14
BR
W- BW- BW- B (
*5)
COMBINATION METER
TELLTALE LIGHT RH
FUEL SENDERI 8
I 3
IE13
BP11
BR BRBR
BR
BR
BR
BR
W- B
I10 : * 3
I 9 : * 4I18 : * 3
I 4 : * 4
I18 : * 3
I 4 : * 4
I11 : * 3
I 1 : * 4
242
J GROUND POINT

2
I10 I10 I 4
I10 I10 I10 1 2
1 2
3 1
2 1
IE FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
G- W
G- O
G- O
G- O
G- O G- O G- O W- L
W- G
W- B
G W- B W- B
W- B
W- G W- G
W- G
W- G
W- G
11 2
2
G- O
W- G W- G 60A
POWER
INTEGRATION
RELAY
LIGHT CONTROL SW
[ COMB. SW] C13
SE AT HEAT ER SW S 6TRACTION CONTROL SW T 8
1
I10
IF116 I20I10G- O
3 5
W- G
A/T INDICATOR
ILLUMINATION
[O/D MAIN SW] O 5 ELECTRONICALLY CONTROLLED
TRANSMISSION PATTERN
SELECT SW E 8
A29
A SHTRAY
ILLUMINATION
G- OG- O
(
CANADA) (
2J Z- GTE)
(
CA N A DA) (
2JZ- GTE)
1 2
W- G
OFF
TA IL
HEAD
10A
PANEL
23 151B 2
1K 11 1I3 TAILLIGHT
RELAY
1J 11E18 1K 5
122
ILLUMINATION

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)