1997 TOYOTA SUPRA stop start

169
TRACTION CONTROL
TRACTION CONTROL IS THE SYSTEM TO REALIZE A FAVORABLE ACCELERATOR CONTROLABILITY BY MAKING
THE ENGINE OUTPUT MOST APPROPRIATE FOR THE ACCELERATION UNDER EACH DRIVING CONDITION
PROVIDED BY THE THROTTLE ECU.
(TRACTION OFF SW)
THIS IS THE SWITCH TO STOP THE OPERATION OF SLIP CONTROL. AFTER STARTING THE ENGINE, PRESSING THE
SWITCH ONE TIME UNDER THE CONDITION THAT THE SNOW INDICATOR DOES NOT LIGHT ON, MAKES IT IN THE
OPERATION STOP CONDITION (OFF), AND PRESSING IT ONE MORE TIME MAKES IT IN THE OPERATION WAITING
CONDITION. IN ADDITION, RESTARTING AFTER THE ENGINE STOP MAKES IT IN THE OPERATION WAITING
CONDITION WITHOUT CONCERNING THE TRACTION OFF SW.
(SNOW MODE SW)
THIS IS THE SWITCH TO FIX LOW  LOADS CONTROL AT THE TIME OF DRIVING ON A SLIPPERY ROAD SUCH AS
SNOWY ROAD. AFTER STARTING THE ENGINE, PRESSING THE SWITCH MAKES IT FIX AT LOW LOAD CONTROL
AND SNOW INDICATOR LIGHT COMES ON. IN ADDITION, RESTARTING AFTER THE ENGINE STOP MAKES IT ALWAYS
IN NORMAL CONDITION (AUTO MODE) WITHOUT CONCERNING THE SNOW MODE SW CONDITION. PRESSING THE
SNOW MODE SW UNDER OPERATION PROHIBITION CONDITION OF THE TRACITION (TRAC OFF INDICATOR LIGHTS
ON.) CANCELS THE OPERATION PROHIBITION OF THE TRACTION AND ALSO FIXES IT AT LOW  LOAD CONTROL.
(TRAC OFF INDICATOR LIGHT)
THIS LIGHT COMES ON BY SELECTING THE OPERATION STOP CONDITION OF THE TRACTION CONTROL WITH
TRACTION OFF SW AND ALERTS THE DRIVER TO BE IN OPERATION STOP CONDITION AND ALSO ALERTS THE
DRIVER BY BLINKING IN CASE OF THE OCCURANCE OF THE SYSTEM MAULFUCTION.
T15 (A), T16 (B)THROTTLE ECU
WT-E1: 0.3 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF INDICATOR LIGHT ON
9-14 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF INDICATOR LIGHT OFF
IND-E1 :0.3 VOLTS WITH THE IGNITION SW ON AND SLIP INDICATOR LIGHT ON
:9-14 VOLTS WITH THE IGNITION SW ON AND SLIP INDICATOR LIGHT OFF
CSW-E1:0.3 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF SW HOLDED ON PUSHING
:9-14 VOLTS WITH THE IGNITION SW ON AND THE TRAC OFF SW RELEASED
SIND-E10.3 VOLTS WITH THE IGNITION SW ON AND THE SNOW INDICATOR LIGHT ON
9-14 VOLTS WITH THE IGNITION SW ON AND THE SNOW INDICATOR LIGHT OFF
SNOW-E1:0.3 VOLTS WITH THE IGNITION SW ON AND THE SNOW MODE SW HELD ON PUSHING
:9-14 VOLTS WITH THE IGNITION SW ON AND THE SNOW MODE SW RELEASED
NE-E1: PULSE GENERATION (ENGINE IDLING)
TC-E1:4.5-5.5 VOLTS WITH THE IGNITION SW ON AND THE ENGINE NOT RUNNING
WA-E1:9-14 VOLTS WITH THE IGNITION SW ON AND THE ABS ECU NORMAL CONDITION
0.3 VOLTS WITH THE IGNITION SW ON AND THE ABS ECU ABNORMAL CONDITION
EFIB-E19-14 VOLTS WITH THE IGNITION SW ON AND THE ENGINE NOT RUNNING
IDL2-E1:9-14 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY OPEN
0-3 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY CLOSED
VTA2-E1:3.2-4.9 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY OPEN
0.3-0.8 VOLTS WITH THE ENGINE RUNNING AND THE SUB THROTTLE VALVE FULLY CLOSED
BATT-E1: ALWAYS 9-14 VOLTS
+B-E1:9-14 VOLTS WITH THE IGNITION SW ON AND ENGINE NOT RUNNING
IDL1-E1:9-14 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
0-3 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
VTA1-E1:3.2-4.9 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY OPEN
0.3-0.8 VOLTS WITH THE IGNITION SW ON AND THE THROTTLE VALVE FULLY CLOSED
RLY+-RL Y :9-14 VOLTS WITH THE IGNITION SW ON
A,A-,B,B+--EO1: PULSE GENERATION (ENGINE RUNNING AND THE THROTTLE VALVE FULLY CLOSED)
EFI+,EFI-, ETC+,ETC--E1: PULSE GENERATION (IGNITION SW ON)
T 8 TRACTION CONTROL SW
4-6:CLOSED WITH THE TRACTIOIN CONTROL SW AT OFF POSITION
8-6:CLOSED WITH THE TRACTIOIN CONTROL SW AT SNOW POSITION
S18 SUB THROTTLE VALVE MOTOR
4-6, 3-1:APPROX. 0.44 W
SYSTEM OUTLINE
SERVICE HINTS

5
678
3 SUPRA(
Cont' d)
2 1
2 1
2 1
2 1
2 1
BBA B B B B BABAABB BB B
B B AAABBBBBBBA BBBB BBBBBBBB A B12
12
12
4IJ214 IJ2 5 IJ2A
10 I C19IC1 12IC1
IC14
IC18
2 1
2 1 AAAAAAB ABB B
BA BBB BB B BB
121212
1
1
ED Rear side of
int ake
manifold 52 47 72 621225756555453525831 35333432 7574151617181920 11 50 492 1
42
48 71 202 40 39 38 7 3 6 0 17624 3344 24 46 63 4 2 31
23 2 6 6 25 27 7 69 80 7943 2 5 3 2 1 2 3 4 31
4
1
A
A 3 1 6 427 26 14 1 3 40 3 9 51 3845 6 6 2 8 BRL B- O B- R
B- W(
A/T) B- YB- R B- R B - R B- R B- R
W- B W- B
W B- L B- RLP
G- B G- Y
G- R
W- L B- R
B- R B- R
B- R B- R L- W
B- O B- W(
A/ T) GRB- Y W- B W- BL- Y O(
A/T) BR- Y GR- RY- L
GR- R
R- L R - LBR- W BR- WL- BG V- W R- W W- RLG B- RL R R- Y B- R V- Y G- O G- WR- GP V R- BR R- WR- GR- YR- L Y- RW W
B- R
OXS HTS W DI FP CIGT1
IGT2IG T3
IGT4IGT5
IGT6IGF
+BISC1
ISC3ISC2
IS C4 EGREVA P
# 6 0 # 50 # 4 0 # 30 # 2 0 # 10 AB S KNK1 KNK2W- B
B- R B- R
V 7
VSV(
Intake Air Control Valve) V 4
VSV(
Exhaust Bypass Valve)
V 5
V SV(Ex haust Gas Co nt rol V alve)V 6
VSV(
Fue l P res sure Up)
A 5
A /T FLUID
TEMP. SENSOR E 1
EGR GAS TEMP. SENSOR
E 3
ENGI NE COO LANT
TEMP . S ENSOR
V 8
VSV(
Waste Gate Valve)Fr om AB S ECU
< 19- 1>
From
Odo and
Trip Meter
[Telltale
Li ght RH]
<26-1> OX HT
(
SHIEL DE D) (SHI ELDED)
H 5
HEA TED OX YGE N
SE NSOR
(
BANK 1
SENSOR 1)
E+B
OX 1 HT1
TE1SP1 V SV1 VS V2 VSV 3 FP U V SV 4 IGSW
NS WM- RE L
BATTTHW OIL THG
IDL2VTA2
(
SHIELDED)
G R- L R- Y R- G R- WR R- B
B- R V- WG L- BBRBR
BR B- R 1
32
4
R- L BR- WV B- RW
(SHIE LDE D)V 2
VSV(
EGR)
V 3
VSV(
EVAP)
HT
OX+B
E1 H1 1
HE ATED OXY GEN SENSOR
(
BA NK 1 S EN SOR 2)
I 1
IDL E AI R C ONTROL VA LVE
Fro m Igniter
<2- 2><2- 3>
L- R
L- R
W- B W- B
W- B B- RP- L Y- RBR
P- L
W- L
G- O
V- Y
BR
Y
W
B RW- G
WO B- WL B- RBRBR BR BR
W- BR GR- RL- R L- RW- B W- B
BR
(
SHIELDED)
(
SHI EL DED)
AC M G G 1 G- G2 NE NE- E 1 EO 1 EO2E2 THA VG E2G PIM VC
EFI+EFI-
ETC +ETC-
VT01VT0 2
FAIL NE OTHA VG E2 G E2
+B
From A/ C
Magnet ic
Clutch
Relay
< 27- 2>
To Thrott le ECU
< 20- 3> To Cruise Cont rol
ECU< 1 7- 3>
To Throttle ECU
<20- 3>
T14
TU RBO P RES SURE
SENSOR
S 5
S UB THROT TLE
POSITION
SENSORT 2
THROTTL E
POS IT ION
SENS ORM 1
MASS AIR
FLOW METER
From
Stop Li gh t
SW< 7 - 4> To Tachometer
[Comb. Meter]
< 26- 6>
Fro m
Dio de
(Idle- Up)
<21- 3>
A
A
AAA A A
BR
(
SHIELDED)(
SH IE LDE D) (
SHIELDED)
OL B- R
B- W
WC 3
CRA NKS HAFT
POS ITION SENS OR
C 2
CAMS HAFT
POSI TION
SEN SO R NO. 2 J 2
J UNCTION
C ONNE CTOR
K 2
KNOCK SENSOR
(
on Re ar Side)
K 1
KNOCK SENSOR
(
o n Front Side)C 1
C AMSH AFT POSITION
S ENS OR NO. 1
BR
B- R
E NGINE CONTRO L MO DULE E 9 B , E10 A GR
B- R B - R
(
A/T)
Engine Control(
2JZ- G TE)
A
B
C
D
E
G
I
K
M
O
Q
SH
J
L
N
P
R F
TA CO IDL1STP E2 VTA 1
VCC PM1 ELSA ABBBBBA 15 1 6 62 4 1 43 64 65 4
G- W
W- B
R
Y
L- R
B- Y
B- W
R- Y
EF I FB 67P
Fr om Th rott le ECU
<20- 3><20- 4>
IJ120
B- R
B- R
6IJ1 A SDL
8
7IJ1B
78E03
BR
GG
(
SHIELDED)
(
SHIE LDED) A
34L- RA/CFr om A/C
Amplifier
< 27- 5>
B
77BSTA * Engine Con tro l Module For th e co nnector s of the parts lis ted below. see t he n ext pa ge.
W- B
(
Cont. next page)
From Park/Neutral
Position SW (A/T)
<1-3>
From Clutch Start
SW (M/T) <1-3>
K

S02982
To Intake
Manifold
S02983
Engine Stopped
Air PQ
S02984
Engine at
3,500 rpm
Air PQ EC-8
- EMISSION CONTROL (2JZ-GTE)EXHAUST GAS RECIRCULATION (EGR) SYSTEM
1245 Author
: Date
:
1997 SUPRA (RM502U)
(b) A/T
Warm up the engine. The coolant temperature in 65°C
(149°F) or more.
(1) Chock the 4 wheels.
(2) Fully apply the parking brake.
(3) Connect a tachometer to the engine.
(4) Start the engine and check idling.
(5) Keep your foot pressed firmly on the brake pedal.
(6) Shifting into the D position. Press the accelerator
pedal slowly to hold the engine speed at 1,600 -
1,800 rpm.
(7) Check that the vacuum gauge indicates low vacu-
um.
6. REMOVE VACUUM GAUGE
Remove the vacuum gauge, and reconnect the vacuum hoses
to their proper locations.
7. INSPECT EGR VALVE
(a) Apply vacuum directly to the EGR valve with the engine
idling.
(b) Check that the engine runs rough or dies.
(c) Reconnect the vacuum hoses to their proper locations.
If no problem is found during this inspection, system is normal;
otherwise inspect each part.
8. INSPECT VSV FOR EGR
(See page SF-69)
9. DISCONNECT VACUUM HOSES FROM EGR VACUUM
MODULATOR
Disconnect the 2 vacuum hoses from ports P and Q of the EGR
vacuum modulator.
10. INSPECT EGR VACUUM MODULATOR OPERATION
(a) Block port P with your finger.
(b) Blow air into port Q, and check that air passes through to
the air filter side freely.
(c) Start the engine, and maintain speed at 3,500 rpm.
(d) Repeat the above test. Check that there is a strong resis-
tance to air flow.
11. RECONNECT VACUUM HOSES TO EGR VACUUM
MODULATOR
Reconnect the 2 vacuum hoses to the proper locations.

P03244
Lock
Press Down
P03245
LockInsert
P13048
SST
P12072
Fuel Pump
Connector SF-2
- SFI (2JZ-GTE)SFI SYSTEM
1328 Author
: Date
:
1997 SUPRA (RM502U)
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (-) cables.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal con-
tact can further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) When inspecting a connector with a volt/ohmmeter
(1) Carefully take out the water-proofing rubber if it is
a water-proof type connector.
(2) Insert the test probe into the connector from the wir-
ing side when checking the continuity, amperage or
voltage.
(3) Do not apply unnecessary force to the terminal.
(4) After checking, install the water-proofing rubber on
the connector securely.
(j) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842-30060
8. FUEL SYSTEM
(a) When disconnecting the high pressure fuel line, a large
amount of gasoline will spill out, so observe the following
procedures:
(1) Disconnect the fuel pump connector.
(2) Start the engine. After the engine has stopped on
its own, turn off the ignition switch.

Q08242
TOYOTA Hand-Held Tester
DLC3
P12563
Disconnect
Plug SF-6
- SFI (2JZ-GTE)FUEL PUMP
1332 Author
: Date
:
1997 SUPRA (RM502U)
(f) Connect the TOYOTA hand-held tester to the DLC3.
(See step 1 in check fuel pump operation (a) to (e).)
(g) Reconnect the negative (-) terminal cable to the battery.
(h) Turn the ignition switch ON.
(i) Measure the fuel pressure.
Fuel pressure:
226 - 275 kPa (2.3 - 2.8 kgf/cm
2, 33 - 40 psi)
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check the following parts:
(1) Fuel hoses and connections
(2) Fuel pump
(3) Fuel filter
(4) Fuel pressure regulator
(j) Remove the TOYOTA hand-held tester from the
DLC3.
(k) Start the engine.
(l) Disconnect the vacuum sensing hose from the fuel pres-
sure regulator, and plug the hose end.
(m) Measure the fuel pressure at idle.
Fuel pressure:
226 - 275 kPa (2.3 - 2.8 kgf/cm
2, 33 - 40 psi)
(n) Reconnect the vacuum sensing hose to the fuel pressure
regulator.
(o) Measure the fuel pressure at idle.
Fuel pressure:
167 - 216 kPa (1.7 - 2.2 kgf/cm
2, 24 - 31 psi)
If pressure is not as specified, check the vacuum sensing hose
and fuel pressure regulator.
(p) Stop the engine.
(q) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure:
147 kPa (1.5 kgf/cm
2, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure
regulator and/or injectors.
(r) After checking fuel pressure, disconnect the negative (-)
terminal cable from the battery and carefully remove the
SST to prevent gasoline from splashing.
SST 09268-45012
(s) Reinstall the fuel inlet hose to the fuel filter with 2 new gas-
kets and the union bolt.
Torque: 29 N´m (300 kgf´cm, 22 ft´lbf)
(t) Reconnect the negative (-) terminal cable to the battery.
(u) Check for fuel leaks.
3. TAKE OUT FLOOR CARPET
4. REMOVE SPARE WHEEL COVER
5. REMOVE SPARE WHEEL
6. REMOVE SERVICE HOLE COVER
7. DISCONNECT FUEL PUMP & SENDER GAUGE CON-
NECTOR

SR13U-01
R07281
Normal
Abnormal
- STEERINGPOWER STEERING FLUID
SR-3
1887 Author
: Date
:
1997 SUPRA (RM502U)
POWER STEERING FLUID
BLEEDING
1. CHECK FLUID LEVEL
(See page SR-4)
2. JACK UP FRONT OF VEHICLE AND SUPPORT IT
WITH STANDS
3. TURN STEERING WHEEL
With the engine stopped, turn the steering wheel slowly from
lock to lock several times.
NOTICE:
Take care that some fluid remains in the oil reservoir.
4. LOWER VEHICLE
5. START ENGINE
Run the engine at idle for a few minutes.
6. TURN STEERING WHEEL
(a) With the engine at idling, turn the steering wheel to left or
right full lock and keep it there for 2-3 seconds, then turn
the wheel to the opposite full lock and keep it there for 2-3
seconds.
(b) Repeat (a) several times.
7. STOP ENGINE
8. CHECK FOR FOAMING OR EMULSIFICATION
If the system has to be bled twice specifically because of foam-
ing or emulsification, check for fluid leaks in the system.
9. CHECK FLUID LEVEL
(See page SR-4)

SR13V-01
R00441
R07281
Normal Abnormal
R10552
5 mm (0.20 in.)
or less
Engine Idling Engine Stopped SR-4
- STEERINGPOWER STEERING FLUID
1888 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. CHECK FLUID LEVEL
(a) Keep the vehicle level.
With the engine stopped, check the fluid level in the oil
reservoir.
If necessary, add fluid.
Fluid: ATF DEXRON® II or III
HINT:
Check that the fluid level is within the HOT LEVEL range on the
dipstick of the reservoir cap. If the fluid is cold, check that it is
within the COLD LEVEL range.
(b) Start the engine and run it at idle.
(c) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature: 80°C (176°F)
(d) Check for foaming or emulsification.
If there is foaming or emulsification, bleed power steering sys-
tem.
(See page SR-3)
(e) With the engine idling, measure the fluid level in the oil
reservoir.
(f) Stop the engine.
(g) Wait a few minutes and remeasure the fluid level in the
reservoir.
Maximum fluid level rise: 5mm (0.20 in.)
If a problem is found, bleed power steering system.
(See page SR-3)
(h) Check the fluid level.

SR13W-01
R09732
W00625
PPS Solenoid
Connector SR-8
- STEERINGSTEERING WHEEL
1892 Author
: Date
:
1997 SUPRA (RM502U)
STEERING WHEEL
INSPECTION
1. CHECK STEERING WHEEL FREEPLAY
With the vehicle stopped and tires pointed straight ahead, rock
the steering wheel gently back and forth with light finger pres-
sure.
Freeplay should not exceed the maximum.
Maximum freeplay: 30 mm (1.18 in.)
2. CHECK STEERING EFFORT
(a) Center the steering wheel.
(b) Remove the steering wheel pad.
(See page SR-1 1)
(c) Start the engine and run it at idle.
(d) Measure the steering effort in both directions.
Reference (Maximum): 6.9 N´m (70 kgf´cm, 61 in.´lbf)
If steering effort is excessive, repair the power steering unit.
HINT:
Be sure to consider the tire type, pressure and contact surface
before making your diagnosis.
(e) Disconnect the PPS solenoid connector.
(f) Measure the steering effort in both directions and check
that the steering effort exceeds the reference value in (d),
and that the power assist is operating.
If steering effort is not heavier than (d), check the solenoid.
(g) Connect the connector.
(h) Torque the steering wheel set nut.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(i) Install the steering wheel pad.
(See page SR-21)