1997 TOYOTA SUPRA stop start

Q04160
Push Rod Play and
Freeplay Adjust Point
Pedal
HeightPedal Height
Adjust Point
Push Rod PlayCL03Z-01
CL0102Pedal Freeplay
Z13785
25 mm (0.98 in.) or more
Full Pedal Stroke Full Stroke
End PositionRelease
Point
- CLUTCHCLUTCH PEDAL
CL-3
1544 Author
: Date
:
1997 SUPRA (RM502U)
CLUTCH PEDAL
INSPECTION
1. CHECK PEDAL HEIGHT
Pedal height from asphalt sheet:
146.2 - 156.2 mm (5.76 - 6.15 in.)
2. IF NECESSARY, ADJUST PEDAL HEIGHT
Loosen the lock nut and clutch switch until the height is correct.
Tighten the lock nut.
HINT:
Before rotating the clutch switch for pedal height adjustment,
disconnect the clutch switch connector.
3. CHECK PEDAL FREEPLAY AND PUSH ROD PLAY
Push in on the pedal until the beginning of clutch resistance is
felt.
Pedal freeplay: 5.0 - 15.0 mm (0.197 - 0.591 in.)
Gently push on the pedal until the resistance begins to increase
a little.
Push rod play at pedal top:
1.0 - 5.0 mm (0.039 - 0.197 in.)
4. IF NECESSARY, ADJUST PEDAL FREEPLAY AND
PUSH ROD PLAY
(a) Loosen the lock nut and turn the push rod until the free-
play and push rod play are correct.
(b) Tighten the lock nut.
(c) After adjusting the pedal freeplay, check the pedal height.
5. INSPECT FULL PEDAL STROKE
Full pedal stroke: 132.0 - 138.0 mm (5.20 - 5.43 in.)
6. INSPECT CLUTCH RELEASE POINT
(a) Pull the parking brake lever and install wheel stopper.
(b) Start the engine and idle the engine.
(c) Without depressing the clutch pedal, slowly shift the shift
lever into the reverse position until the gears contact.
(d) Gradually depress the clutch pedal and measure the
stroke distance from the point the gear noise stops (re-
lease point) up to the full stroke end position.

V07268
VIBRATION METHOD: When vibration seems to be the major cause.
CONNECTORS
WIRE HARNESS
PARTS AND SENSOR1
Slightly shake the connector vertically and horizontally.
Slightly shake the wire harness vertically and horizontally.
The connector joint, fulcrum of the vibration, and body
through portion are the major areas to be checked thorough-
ly.
Apply slight vibration with a finger to the part of the sensor
considered to be the problem cause and check if the
malfunction occurs.Shake Slightly
Swing Slightly
Vibrate Slightly
HINT: Applying strong vibration to relays may result in open
relays. IN-22
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
22 Author
: Date
:
1997 SUPRA (RM502U)
3. SYMPTOM SIMULATION
The most difficult case in troubleshooting is when there are no problem symptoms occurring. In such cases,
a thorough customer problem analysis must be carried out, then simulate the same or similar conditions and
environment in which the problem occurred in the customer's vehicle. No matter how much experience a
technician has, or how skilled he may be, if he proceeds to troubleshoot without confirming the problem
symptoms he will tend to overlook something important in the repair operation and make a wrong guess
somewhere, which will only lead to a standstill. For example, for a problem which only occurs when the en-
gine is cold, or for a problem which occurs due to vibration caused by the road during driving, etc., the prob-
lem can never be determined so long as the symptoms are confirmed with the engine hot condition or the
vehicle at a standstill. Since vibration, heat or water penetration (moisture) are likely causes for problems
which are difficult to reproduce, the symptom simulation tests introduced here are effective measures in that
the external causes are applied to the vehicle in a stopped condition.
Important Points in the Symptom Simulation Test:
In the symptom simulation test, the problem symptoms should of course be confirmed, but the problem area
or parts must also be found out. To do this, narrow down the possible problem circuits according to the symp-
toms before starting this test and connect a tester beforehand. After that, carry out the symptom simulation
test, judging whether the circuit being tested is defective or normal and also confirming the problem symp-
toms at the same time. Refer to the matrix chart of problem symptoms for each system to narrow down the
possible causes of the symptom.

Z07425
12
10
111 2 345
6
789
Wire Harness Side
Z07426
Ignition
Switch
BatteryWarning Light
- BODY ELECTRICALCOMBINATION METER
BE-49
2027 Author
: Date
:
1997 SUPRA (RM502U)
21. INSPECT LIGHT FAILURE SENSOR CIRCUIT
Disconnect the connector from the sensor and inspect the con-
nector on the wire harness side, as shown.
Tester connectionConditionSpecified condition
1 - GroundConstantContinuity*
2 - GroundConstantContinuity*
9 - GroundConstantContinuity*
10 - GroundConstantContinuity*
11 - GroundConstantContinuity
12 - GroundConstantContinuity*
3 - GroundLight control switch position OFFNo Voltage
3 - GroundLight control switch position TAIL or HEADBattery positive voltage
4 - GroundIgnition switch position LOCK or ACCNo voltage
4 - GroundIgnition switch position ONBattery positive voltage
7 - GroundStop light switch position OFFNo voltage
7 - GroundStop light switch position ONBattery positive voltage
8 - GroundEngine condition StopNo voltage
8 - GroundEngine condition RunningBattery positive voltage
*: There is the resistance because this circuit is grounded
through the bulb.
If circuit is as specified, replace the sensor.
If the circuit is not as specified, inspect the circuits connected
to other parts.
22. INSPECT LIGHT FAILURE WARNING LIGHT
(a) Disconnect the connector from the light failure sensor and
ground terminal 4 on the wire harness side connector.
(b) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.

28 Noise NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING
No
Ye s Is speaker properly installed?
Noise is produced from static electricity accumulating in the vehicle body. With vehicles stationary lightly tap each system.
Is noise produced?Install properly.
Each system faulty. Is speaker properly installed?
No
No Ye s
Ye s
29 Noise NOISE PRODUCED WHEN ENGINE STARTS
NoYe s Whistling noise which becomes high-pitched when
accelerator strongly depressed, disappears shortly
after engine stops.Generator noise.
A/C noise.
Fuel gauge noise.
Horn noise.
Ignition noise.
Turn signal noise.
Washer noise.
Engine coolant temp. gauge noise.
Wiper noise. Whining noise occurs when A/C is operating.
Scratching noise occurs during sudden acceleration, driving on rough
roads or when ignition switch is turned ON.
Clicking sound is heard when horn button is pressed, then
released. Whirring/grating sound is heard when pushed
continuously.
Murmuring sound stops when engine stops.
Tick-tack noise occurs in co-ordination with blinking
offlasher.
Noise occurs during window washer operation.
Scratching noise occurs while engine is running,
and continues a while even after engine stops.
Scraping noise in line with wiper beat.
Other type of noiseYe s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s No
No
No
No
No
No
No
No
- BODY ELECTRICALAUDIO SYSTEM
BE-95
2073 Author
: Date
:
1997 SUPRA (RM502U)

S04468
Stop Below 91°C
S04469
Below 91°C
ECT Switch
ConnectorDisconnect
CO090-01
S04470
Above 100°C
RotateThermometer
S04471
Ammeter
Battery
Fan Connector 2.5 - 4.5 A
- COOLINGELECTRIC COOLING FAN (2JZ-GTE)
CO-29
1442 Author
: Date
:
1997 SUPRA (RM502U)
ELECTRIC COOLING FAN
(2JZ-GTE)
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION WITH LOW
TEMPERATURE (Below 91°C (196°F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fan stops.
If not, check the cooling fan relay and ECT switch, and check
for a separated connector or severed wire between the No.1 ra-
diator fan relay and ECT switch.
(c) Disconnect the ECT switch connector.
(d) Check that the cooling fan rotates.
If not, check the No.1 radiator relay, No.2 radiator fan relay,
cooling fan, fuses, and check for short circuit between the No.1
radiator fan relay and ECT switch.
(e) Reconnect the ECT switch connector.
2. CHECK COOLING FAN OPERATION WITH HIGH
TEMPERATURE (Above 100°C (212°F))
(a) Start the engine, and raise coolant temperature to above
100°C (212°F).
(b) Check that the cooling fan rotates.
If not, replace the ECT switch.
3. INSPECT COOLING FAN
(a) Disconnect the fan connector.
(b) Connect battery and ammeter to the cooling fan connec-
tor.
(c) Check that the cooling fan rotates smoothly, and check
the reading on the ammeter.
Standard amperage: 2.5 - 4.5 A
(d) Reconnect the fan connector.

DI-152
- DIAGNOSTICSENGINE (2JZ-GTE)
380 Author
: Date
:
1997 SUPRA (RM502U)
6. BASIC INSPECTION
When the malfunction code is not confirmed in the DTC check, troubleshooting should be performed in the
order for all possible circuits to be considered as the causes of the problems.
In many causes, by carrying out the basic engine check shown in the following flow chart, the location caus-
ing the problem can be found quickly and efficiently. Therefore, use of this check is essential in engine trou-
bleshooting.
1 Is battery positive voltage 11 V or more when engine is stopped?
NO Charge or replace battery.
YES
2 Is engine cranked?
NO Proceed to page ST-14, ST-16 and continue to
troubleshoot.
YES
3 Does engine start?
NO Go to step 7.
YES

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-157
385 Author
: Date
:
1997 SUPRA (RM502U)
(b) TOYOTA Enhanced Signals
TOYOTA hand-held
tester displayMeasurement ItemNormal Condition*
MISFIRE RPMEngine RPM for first misfire rangeMisfire 0: 0 rpm
MISFIRE LOADEngine load for first misfire rangeMisfire 0: 0 g/r
INJECTORFuel injection time for cylinder No.1Idling: 1.3 ~ 2.7 ms
IAC STEP POSIntake Air Control Valve Step Position Opening position step motor type IAC valveIdling: 10 ~ 50 step
STARTER SIGStarter SignalCranking: ON
CTP SWClosed Throttle Position Switch SignalThrottle fully closed: ON
A/C SIGA/C Switch SignalA/C ON: ON
PNP SWPark / Neutral Position Switch SignalP or N position: ON
ELECTRICAL LOAD SIGElectrical Load SignalDefogger S/W ON: ON
STOP LIGHT SWStop Light Switch SignalStop light switch ON: ON
FC IDLFuel Cut Idle: Fuel cut when throttle valve fully closed, during decelerationFuel cut operating: ON
FC TAUFuel Cut TAU: Fuel cut after between 20 sec. at light loadFuel cut operating: ON
CYL #1
CYL #2
CYL #3
CYL #4
CYL #5
CYL #6
Abnormal revolution variation for each cylinder0%
IGNITIONTotal number of ignitions for every 1,000 revolutions0 ~ 3,0000
EGRT GASEGR Gas Temperature Sensor Value
EGR not operating:
Temperature between intake
air temp. and engine coolant
temp.
FUEL PRES UP VSVFuel Pressure Up VSV SignalHigh temp. restarting: ON
EGR SYSTEMEGR system operating conditionIdling: OFF
FUEL PUMPFuel Pump SignalIdling: ON
A/C MAG CLUTCHA/C Magnetic Clutch SignalA/C ON: ON
EVAP (PURGE) VSVEVAP VSV SignalVSV operating: ON
TURBO BOOST VSVWaste gate valve VSV signalVSV operating: ON
INTK AIR CTL VSVIntake Air Control Valve VSV SignalVSV operating: OFF
EXH GAS CTL VSVExhaust Gas Control Valve VSV SignalVSV operating: OFF
EXH BYPASS VSVExhaust Bypass Valve VSV SignalVSV operating: OFF
TOTAL FT B1Total Fuel Trim Bank 1: Average value for fuel trim system of bank 1Idling: 0.8 ~ 1.2
TOTAL FT B2Total Fuel Trim Bank 2: Average value for fuel trim system of bank 2Idling: 0.8 ~ 1.2
02 LR B1, S1Oxygen Sensor Lean Rich Bank 1, Sensor 1 Response time for oxygen sensor
output to switch from lean to rich.Idling after warmed up:
0 ~ 1,000 m sec.
02 RL B1, S1Oxygen Sensor Rich Lean Bank 1, Sensor 1 Response time for oxygen sensor
output to switch from rich to lean.Idling after warmed up:
0 ~ 1,000 m sec.
*: If no conditions are specifically stated for ºIdlingº, it meas the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-161
389 Author
: Date
:
1997 SUPRA (RM502U)
DTC CHART (Manufacture Controlled)
DTC No.
(See Page)Detection ItemTrouble AreaMIL*Memory
P1100
(DI-247)Barometric Pressure Sensor Cir-
cuit MAlfunctionECM
P1200
(DI-248)Fuel Pump Relay / ECU Circuit
Malfunction
Open or short in fuel pump ECU circuit
Fuel pump ECU
ECM power source circuit
Fuel pump
ECM
-
P1300
(DI-252)Igniter Circuit
MalfunctionOpen or short in IGF or IGT circuit from igniter to ECM
Igniter
ECM

P1335
(DI-257)Crankshaft Position Sensor
Circuit Malfunction (during
engine running)
Open or short in crankshaft position sensor circuit for NE sig-
nal
Crankshaft position sensor for NE signal
Starter
ECM
-
P1400
(DI-258)Sub Throttle Position Sensor
MalfunctionOpen or short in sub throttle position sensor circuit
Sub throttle position sensor
ECM

P1401
(DI-261)Sub Throttle Position Sensor
Range / Performance ProblemSub throttle position sensor
P1405
(DI-262)Turbo Pressure Sensor Circuit
MalfunctionOpen or short in turbo pressure sensor circuit
Turbo pressure sensor
ECM

P1406
(DI-265)Turbo Pressure Sensor Circuit
Range / Performance ProblemTurbo pressure sensor
P1511
(DI-266)Boost Pressure Low
Malfunction
Air intake (leakage or clogging)
Actuator (for waste gate valve, IACV control valve, exhaust
bypass valve and exhaust gas control valve)
Short in VSV for waste gate valve, IACV control valve, exhaust
bypass valve and exhaust gas control valve circuit
ECM

P1512
(DI-274)Boost Pressure High
Malfunction
Actuator (for waste gate valve and exhaust bypass valve)
Short in VSV for waste gate valve and exhaust bypass valve
circuit
ECM

P1520
(DI-279)Stop Light Switch Signal
MalfunctionShort in stop light switch signal circuit
Stop light switch
ECM

P1600
(DI-282)ECM BATT
MalfunctionOpen in back up power source circuit
ECM
*:
.... MIL dose not light up
 ... MIL lights up