1997 TOYOTA SUPRA engine

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.

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

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

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.

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.

DI4SG-01
ENGINE CONTROL SYSTEM Check Sheet
Customer's Name
Driver's Name
Date Vehicle
Brought in
License No.
Model and Model
Year
Frame No.
Engine Model
Odometer Reading
km
miles
Problem Symptoms
Engine does
not Start
Difficult to
Start
Poor Idling
Poor
Driveability
Engine Stall
Others
Engine does not crankNo initial combustionNo complete combustion
Engine cranks slowly
Other
Incorrect first idleIdling rpm is abnormalHigh ( rpm)Low ( rpm)
Rough idling
Other
HesitationBack fireMuffler explosion (after-fire)Surging
Knocking
Other
Soon after startingAfter accelerator pedal depressed
After accelerator pedal released
During A/C operation
Shifting from N to D
Other
Dates Problem
Occurred
Problem Frequency
Condition When
Problem Occurs
Weather
Engine Operation
Engine Temp. Place Outdoor
TemperatureConstant
Sometimes ( times per day/month)Once only
Other
Fine
CloudyRainySnowyVarious/Other
Hot
Warm CoolCold (approx. °F/ °C)
Highway
SuburbsInner cityUphillDownhill
Rough road
Other
Cold
Warming upAfter warming upAny temp.Other
Starting
Just after starting ( min.)IdlingRacing
Driving
Constant speedAccelerationDeceleration
A/C switch ON/OFF
Other
Condition of MILRemains on Sometimes light up Does not light up
NormalMalfunction code(s) (code )
Freezed frame data ( )
NormalMalfunction code(s) (code )
Freezed frame data ( )
Normal Mode
(Precheck)
Check Mode DTC InspectionInspector's
Name
DI-146
- DIAGNOSTICSENGINE (2JZ-GTE)
374 Author
: Date
:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI4SH-01
FI0534
Q08242
TOYOTA Hand-Held Tester
DLC3
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-147
375 Author
: Date
:
1997 SUPRA (RM502U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
When troubleshooting OBD II vehicles, the only differ-
ence from the usual troubleshooting procedure is that you
connect to the vehicle the OBD II scan tool complying with
SAE J1978 or TOYOTA hand-held tester, and read off
various data output from the vehicle's ECM.
OBD II regulations require that the vehicle's on-board
computer lights up the Malfunction Indicator Lamp (MIL)
on the instrument panel when the computer detests a
malfunction in the computer itself or in drive system com-
ponents which affect vehicle emissions. In addition to the
MIL lighting up when a malfunction is detected, the appli-
cable Diagnostic Trouble Codes (DTC) prescribed by
SAE J2012 are recorded in the ECM memory.
(See page DI-158)
If the malfunction does not reoccur in 3 trips, the MIL goes
off but the DTC remain recorded in the ECM memory.
To check the DTC, connect the OBD II scan tool or TOYO-
TA hand-held tester to Data Link Connector 3 (DLC3) on
the vehicle. The OBD II scan tool or TOYOTA hand-held
tester also enables you to erase the DTC and check
freezed frame data and various forms of engine data. (For
operating instructions, see the OBD II scan tool's instruc-
tion book.)
DTC include SAE controlled codes and Manufacturer
controlled codes.
SAE controlled codes must be set as prescribed by the
SAE, while Manufacturer controlled codes can be set
freely by the manufacturer within the prescribed limits.
(See DTC chart on page DI-158)
The diagnosis system operates in normal mode during
normal vehicle use. It also has a check mode for techni-
cians to simulate malfunction symptoms and trouble-
shoot. Most DTC use 2 trip detection logic* to prevent er-
roneous detection and ensure thorough malfunction
detection. By switching the ECM to check mode when
troubleshooting, the technician can cause the MIL to light
up for a malfunction that is only detected once or momen-
tarily. (TOYOTA hand-held tester only)
(See page DI-147)
*2 trip detection logic: When a logic malfunction is first de-
tected, the malfunction is temporarily stored in the ECM
memory. If the same malfunction is detected again during
the second drive test, this second detection causes the
MIL to light up.