Page 553 of 1807

CO1206Overhaul Handle Dimension º B º
SSTPart º A º
Punch AssemblyStopper Bolt
Z09523
1
SSTTank
Lock
Plate
Stopper Bolt58
64 3
72
P11771
Bracket Tank Rib
Pipe
P11772
CO-26
- COOLINGRADIATOR
1439 Author: Date:
1997 SUPRA (RM502U)
4. ASSEMBLE SST
SST 09230-01010, 09231-14010
(a) Install the punch assembly to the overhaul handle, insert-
ing it in the hole in part ºAº as shown in the illustration.
(b) While gripping the handle, adjust the stopper bolt so that
dimension ºBº shown in the diagram.
Dimension ºBº:
8.4 mm (0.34 in)
5. CAULK LOCK PLATE
(a) Lightly press SST against the lock plate in the order
shown in the illustration. After repeating this a few times,
fully caulk the lock plate by squeezing the handle until
stopped by the stopper plate.
SST 09230-01010
HINT:
Do not stake the areas protruding around the pipes,
brackets or tank ribs.
The points shown in the rib sides and oil cooler near here
cannot be staked with SST. Use a plier or similar object
and be careful not to damage the core plates.
Page 554 of 1807
P02648
H
P04580
SST
B02745
Clearance
Lock
Plate
O-Ring
- COOLINGRADIATOR
CO-27
1440 Author: Date:
1997 SUPRA (RM502U)
(b) Check the lock plate height (H) after completing the caulk-
ing.
Plate height:
7.40 - 7.80 mm (0.2959 - 0.3119 in)
If not within the specified height, adjust the stopper bolt of the
handle again and caulk again.
6. INSPECT FOR WATER LEAKS
(a) Tighten the drain plug.
(b) Plug the inlet and outlet pipes of the radiator with SST.
SST 09230-01010
(c) Using a radiator cap tester, apply pressure to the radiator.
Test pressure:
177 kPa (1.8 kgf/cm
2, 26 psi)
(d) Inspect for water leaks.
HINT:
On radiators with resin tanks, there is a clearance between the
tank and lock plate where a minute amount of air will remain,
giving the appearance of an air leak when the radiator is sub-
merged in water. Therefore, before doing the water leak test,
move the radiator around in the water until all air bubbles disap-
pear.
7. INSTALL CUSHIONS TO RADIATOR
Page 555 of 1807

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.
Page 556 of 1807
CO091-02
S04927
Air Cleaner Duct
Upper Radiator Hose
Lower Radiator Hose
Radiator
Cap
Radiator Reservoir
Hose
No.5 Air Hose
Battery
Battery Tray Radiator
AssemblyHold-Down
Clamp
Battery Insulator Oil Cooler Hose (A/T)
Upper Radiator
Support
Electric Cooling
Fan Connector
No.2 Air Tube
Drain Plug
No.2 Fan ShroudClipECT Switch (for Electric
Cooling Fan) Connector Lower
Radiator
Support
O-Ring
Electric Cooling Fan
RadiatorNo.1 Fan Shroud Engine Under Cover x16 2JZ-GTE
O-Ring ECT Switch (for Electric Cooling Fan)
Drain Hose
Non-reusable partLH Headlight Beam Angle Gauge CO-30
- COOLINGELECTRIC COOLING FAN (2JZ-GTE)
1443 Author: Date:
1997 SUPRA (RM502U)
COMPONENTS
Page 557 of 1807
CO092-02
S04950
- COOLINGELECTRIC COOLING FAN (2JZ-GTE)
CO-31
1444 Author: Date:
1997 SUPRA (RM502U)
REMOVAL
1. REMOVE RADIATOR (See page CO-22)
2. REMOVE FAN
Remove the 6 screws and 2 fans.
3. REMOVE FAN MOTOR
(a) Disconnect the 2 connectors from the fan shroud.
(b) Remove the 6 screws and 2 fan motors.
NOTICE:
Install the fan motor so that its water drainage hole faces
downward.
Torque: 3.9 N´m (40 kgf´cm, 35 in.´lbf)
4. REASSEMBLY IS IN THE REVERSE ORDER OF RE-
MOVAL (See step 3)
Page 558 of 1807

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
Page 559 of 1807

P12291
No.1 Radiator
Fan Relay
CO095-01
P11929
Ohmmeter
No Continuity
Continuity1
2
43
Ohmmeter
P11928
Ohmmeter
Continuity1
2
43
Battery
P12292
No.2 Radiator
Fan Relay
P12133
No Continuity
Continuity 1 2
5 3 Ohmmeter
OhmmeterOhmmeter
Continuity
6 CO-34
- COOLINGRADIATOR FAN RELAY
1447 Author: Date:
1997 SUPRA (RM502U)
RADIATOR FAN RELAY (2JZ-GTE)
INSPECTION
1. w/ Auto Spoiler:
REMOVE LH HEADLIGHT
2. w/o Auto Spoiler:
REMOVE ENGINE UNDER COVER
3. INSPECT NO.1 RADIATOR FAN RELAY
(a) Remove the No.1 radiator fan relay. (Marking: RADIA-
TOR FAN RELAY)
(b) Inspect the No.1 radiator fan relay continuity.
(1) Using an ohmmeter, check that there is continuity
between terminals 3 and 4.
If there is no continuity, replace the relay.
(2) Check that there is no continuity between terminals
1 and 2.
If there is continuity, replace the relay.
(c) Inspect the No.1 radiator fan relay operation.
(1) Apply battery positive voltage across terminals 3
and 4.
(2) Using an ohmmeter, check that there is continuity
between terminals 1 and 2.
If there is no continuity, replace the relay.
(d) Reinstall the No.1 radiator fan relay
4. INSPECT NO.2 RADIATOR FAN RELAY
(a) Remove the No.2 radiator fan relay. (Marking:
A.B.S.(TRAC) RELAY)
(b) Inspect the No. 2 radiator fan relay continuity.
(1) Using an ohmmeter, check that there is continuity
between terminals 1 and 6.
If there is no continuity, replace the relay.
(2) Check that there is continuity between terminals 3
and 5.
If there is no continuity, replace the relay.
(c) Check that there is no continuity between terminals 2 and
5.
If there is continuity, replace the relay.
(d) Inspect the No.2 radiator fan relay operation.
(e) Apply battery positive voltage across terminals 1 and 6.
(1) Using an ohmmeter, check that there is no continu-
ity between terminals 3 and 5.
(2) If there is continuity, replace the relay.
(3) Check that there is continuity between terminals 2
and 5.
Page 560 of 1807

DI4SF-01
Vehicle Brought to Workshop
Customer Problem Analysis P. DI-146
Problem Symptom Confirmation
If the engine does not start, perform steps 10 and 12 firstConnect the OBD II scan tool or TOYOTA hand-held tester to DLC3 P. DI-147
If the display indicates a communication fault in the tool, inspect DLC3 P. DI-147
Check DTC and Freezed Frame Data (Precheck)
Record or Print DTC and Freezed Frame Data P. DI-147
Clear DTC and Freezed Frame Data P. DI-147
Visual Inspection
Setting the Check Mode Diagnosis P. DI-147
Symptom Simulation P. IN-18
DTC Chart P. DI-158
Matrix Chart of Problem Symptoms P. DI-169
Circuit Inspection P. DI-170
Adjustment, Repair
DTC Check P. DI-14
Titles insideare titles of pages in
in the bottom portion. See the indicated
pages for detailed explanations.this manual, with the page number indicated
Malfunction
occurs.Malfunction does not occur.
Parts Inspection
Check for Intermittent Problems P. DI-147
Identification of Problem
Confirmation Test
End 1
2
3
4
5
6
7
108
9
11
12
13
15 14
16
Normal Malfunction code.
17Basic Inspection P. DI-147
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-145
373 Author: Date:
1997 SUPRA (RM502U)
ENGINE (2JZ-GTE)
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the produce on the following page.