1997 TOYOTA SUPRA coolant temperature

Z18230
Brake Fluid Level Warning Switch
Parking Brake Switch
Telltale Light LH
Telltale Light RHVehicle Speed Sensor
Light Failure Sensor
DOME Fuse
Combination Meter
Door Courtesy Switches GAUGE Fuse
ECU-B Fuse
IGN Fuse
PANEL Fuse
TAIL Fuse Integration
Fuel Sender Gauge
: Engine Coolant Temperature Sensor
: Engine Oil Level Sensor
: Low Oil Pressure Warning Switch
: Park/Neutral Position Switch
: Vehicle Speed Sensor 2JZ-GE2JZ-GTE
1
5
4
3
2 Relay
R/B No.2
J/B No.1
Meter Circuit











1
1
5 4
3
2 1
2
3
4
5
BE0E7-01
- BODY ELECTRICALCOMBINATION METER
BE-39
2017 Author
: Date
:
1997 SUPRA (RM502U)
COMBINATION METER
LOCATION

I02078
Cruise Control Indicator :Fuel Gauge
:Engine Coolant Temperature Gauge
:Tachometer
:Speedometer
D.R.L. :Daytime Running Light
* :Engine Oil Level Delay Circuit
F
E
T
S
F
E
T
S C8
A10
A11
A9
A8
A13
C11
C10
B13
B12
B2
A1
C7
C5
A14
A7
A6
A3
C1
C2
C13
A5P
R
N
D
2
LB4
B10
B6
B7
B8
B11
B1
C9
A16
C4
C6
A15
A2
B3
C12 Fuel Level Warning
MANU Indicator
O/D OFF Indicator
Brake Warning
Bulb Check Relay
TRAC Indicator
Right Turn Indicator
High Beam Indicator
Master Warning
Illumination
SNOW IndicatorLeft Turn Indicator
No. Wire Harness Side
Brake Fluid Level Warning Switch
Parking Brake Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Headlight Dimmer Switch
ECT ECU
Cruise Control ECU
TRAC ECU
Ground (Engine)
Engine Coolant Temperature Sender Gauge
Fuel Sender Gauge
Ground (Signal)
Turn Signal Switch
Starter Relay Generator L Terminal Igniter
Park/Neutral Position Switch (A/T Vehicle) A1
2
3
5
6
7
8
9
10
11
13
14
15
16
BGAUGE Fuse
O/D OFF Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Park/Neutral Position Switch (P)
Park/Neutral Position Switch (N)
ECT ECU
Ground (Power)
Park/Neutral Position Switch (D)
Park/Neutral Position Switch (2)
Park/Neutral Position Switch (L) Park/Neutral Position Switch (R) 1
2
3
6
7
8
10
11
124
13
Engine Oil Level Sensor
Turn Signal Switch
Ground (Power)
Fuel Sender Gauge
GAUGE Fuse
Vehicle Speed Sensor (Terminal 2)
Vehicle Speed Sensor (Terminal 3)
USA:TAIL (RH) Fuse, PANEL Fuse
Light Control Rheostat Telltail Light RH (Terminal 11)
Telltail Light LH (Terminal 1)
Telltail Light LH (Terminal 6) 1
2
6
7
8
10
11
124
135
9 CCANADA:D.R.L. No.3 Relay
Clutch Start Switch (M/T Vehicle)
CANADA:D.R.L. No.3 Relay
CANADA:D.R.L. No.3 Relay
- BODY ELECTRICALCOMBINATION METER
BE-41
2019 Author
: Date
:
1997 SUPRA (RM502U)

Z07423
Ignition
Switch
Battery Engine Coolant Temperature Gauge
Sender
Gauge
Z14747
Battery Engine Coolant Temperature Gauge
Test Bulb
(3W)
Z09421
A
BC
N15887
BE-46
- BODY ELECTRICALCOMBINATION METER
2024 Author
: Date
:
1997 SUPRA (RM502U)
10. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates COOL.
(c) Ground terminal on the wire harness side connector
through a 3 W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and that the receiver gauge needle moves toward the hot
side.
If operation is as specified, replace the sender gauge.
Then recheck the system.
If operation is not as specified, measure the receiver gauge re-
sistance.
11. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
HINT:
Connect the test leads so that the current from the ohmmeter
can flow according to the chart order.
Between terminalsResistance (W)
A - BApprox. 229.7
A - CApprox. 54.0
B - CApprox. 175.7
If resistance value is not as specified, replace the engine cool-
ant temperature receiver gauge.
12. INSPECT ENGINE COOLANT TEMPERATURE SEND-
ER GAUGE RESISTANCE
Measure the resistance between terminal and gauge body.
Temperature °C (°F)Resistance (W)
50 (122.0)160 ~ 240
120 (248.0)17.1 ~ 21.2
If resistance value is not as specified, replace the engine cool-
ant temperature sender gauge.

P11908
(A)
Z16741
Drain
Hose
ECT Switch (2JZ-GTE)
S05171
- COOLINGRADIATOR
CO-23
1436 Author
: Date
:
1997 SUPRA (RM502U)
10. REMOVE RADIATOR ASSEMBLY
(a) 2JZ-GTE:
Disconnect the ECT switch (for electric cooling fan con-
nector) and wire harness.
(b) 2JZ-GTE:
Disconnect the 2 electric cooling fan connectors and wire
harness.
(c) Remove the bolt and upper radiator support. Remove the
2 upper radiator supports.
HINT:
At the time of installation, please refer to the following items.
Check that the rubber cushion (A) of the support is not de-
pressed.
Torque: 15 N´m (155 kgf´cm, 11 ft´lbf)
(d) Lift out the radiator assembly.
(e) Remove the 2 lower radiator supports.
11. REMOVE DRAIN HOSE FROM RADIATOR
12. 2JZ-GTE:
REMOVE ENGINE COOLANT TEMPERATURE (ECT)
SWITCH FROM RADIATOR
(a) Remove the ECT switch.
HINT:
At the time of installation, please refer to the following item.
Apply soapy water to the O-ring, and install the ECT switch.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
(b) Remove the O-ring from the ECT switch.
HINT:
At the time of installation, please refer to the following item.
Use a new O-ring.
13. REMOVE NO.1 FAN SHROUD FROM RADIATOR
(a) 2JZ-GE:
Remove the 4 bolts and No.1 fan shroud.
(b) 2JZ-GTE:
Remove the 5 bolts and No.1 fan shroud.

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.

P01924
Ohmmeter
P13220
CO094-01
- COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
CO-33
1446 Author
: Date
:
1997 SUPRA (RM502U)
ENGINE COOLANT
TEMPERATURE (ECT) SWITCH
(2JZ-GTE)
INSPECTION
1. REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. REMOVE ECT SWITCH
(a) Disconnect the ECT switch connector.
(b) Remove the ECT switch.
(c) Remove the O-ring from the ECT switch.
4. INSPECT ECT SWITCH
(a) Using an ohmmeter, check that there is no continuity be-
tween the terminals when the coolant temperature is
above 100°C (212°F).
If there is continuity, replace the switch.
(b) Using an ohmmeter, check that there is continuity be-
tween the terminals when the coolant temperature is be-
low 91°C (196°F).
If there is no continuity, replace the switch.
5. REINSTALL ECT SWITCH
(a) Install a new O-ring to the ECT switch.
(b) Apply soapy water to the O-ring.
(c) Install the ECT switch.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
(d) Connect the ECT switch connector.
6. REFILL WITH ENGINE COOLANT
7. START ENGINE AND CHECK FOR LEAKS
8. REINSTALL ENGINE UNDER COVER

DI-156
- DIAGNOSTICSENGINE (2JZ-GTE)
384 Author
: Date
:
1997 SUPRA (RM502U)
7. ENGINE OPERATING CONDITION
NOTICE:
The values given below for ºNormal Conditionº are representative values, so a vehicle may still be
normal even if its value varies from those listed here. So do not decide whether a part is faulty or not
solely according to the ºNormal Conditionº here.
(a) CARB Mandated Signals
TOYOTA hand-held
tester displayMeasurement ItemNormal Condition*
FUEL SYS #1
Fuel System Bank 1
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operatingIdling after warmed up:
CLOSED
CALC LOADCalculator Load:
Current intake air volume as a proportion of max. intake air volumeIdling: 6.7 - 11.0 %
Racing without load
(2,500 rpm): 7.0 - 11.3 %
COOLANT TEMPEngine Coolant Temperature Sensor ValueAfter warmed up:
80 - 95°C (176 - 203°F)
SHORT FT #1Short - term Fuel Trim Bank 10 ± 20 %
LONG FT #1Long - term Fuel Trim Bank 10 ± 20 %
ENGINE SPDEngine SpeedIdling: 650 ± 50 rpm
VEHICLE SPDVehicle SpeedVehicle stopped:
0 km/h (0 mph)
IGN ADVANCEIgnition Advance
Ignition Timing of Cylinder No.1Idling: BTDC 10 ~ 20°
INTAKE AIRIntake Air Temperature Sensor ValveEquivalent to Ambient Temp.
MAFAir Flow Rate Through Mass Air Flow Meter
Idling: 2.9 - 4.8 gm/sec
Racing without load
(2,500 rpm):
11.7 - 18.8 gm/sec
THROTTLE POSVoltage Output of Throttle Position Sensor Calculated as a Percentage
0 V " 0 %, 5 V " 100 %Throttle
Fully Closed: 7 - 11 %
Fully Open: 65 - 75 %
O2S B1, S1Voltage Output of Oxygen Sensor Bank1, Sensor 1Idling: 0.1 - 0.9 V
O2FT B1, S1Oxygen Sensor Fuel Trim Bank1, Sensor 1
(Same as SHORT FT #1)0 ± 20 %
02S, B1, S2Voltage Output of Oxygen Sensor Bank 1, Sensor 2Driving 50 km/h (31 mph):
0.1 - 0.9 V
*: If no conditions are specifically stated for ºidlingº, it means 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-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.