1995 TOYOTA SUPRA radiator

ELECTRIC COOLING FAN (2JZ±GTE)
On±Vehicle Inspection
1. C H E C K C O O L I N G FA N O P E R AT I O N W I T H L O W
TEMPERATURE (Below 88°C (190°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
radiator 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 97°C (207°F))
(a) Start the engine, and raise coolant temperature to above
97°C (207°F).
(b) Check that the cooling fan rotates.
If not, replace the ECT switch.
± ENGINECOOLING SYSTEMEG±353

Engine Coolant Temperature (ECT)
Switch
ECT SWITCH 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) Usin g an oh mme te r, ch e ck th a t th e re is no co n tin u ity
between the terminals when the coolant temperature is
above 97°C (207°F).
(b) Using an ohmmeter, check that there is continuity between
the terminals when the coolant temperature is below 88°C
(190°F).
If continuity is not as specified, 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 NVm (75 kgfVcm, 65 in.Vlbf)
(d) Connect the ECT switch connector.
6. REFILL WITH ENGINE COOLANT
7. START ENGINE AND CHECK FOR LEAKS
8. REINSTALL ENGINE UNDER COVER
No.1 Radiator Fan Relay
(ºRADIATOR FAN RELAYº)
RADIATOR FAN RELAY INSPECTION
1. w/ Auto Spoiler:
REMOVE LH HEADLIGHT
2. w/o Auto Spoiler:
REMOVE ENGINE UNDER COVER
3. REMOVE RADIATOR FAN RELAY
4. INSPECT RADIATOR FAN RELAY
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity between
terminals 3 and 4.
(b) Check that there is no continuity between terminals 1 and 2.
If continuity is as specified, replace the relay. EG±356
± ENGINECOOLING SYSTEM

B. Inspect relay operation
(a) Apply battery voltage across terminals 3 and 4.
(b) Using an ohmmeter, check that there is continuity between
terminals 1 and 2.
If operation is not as specified, replace the relay.
5. REINSTALL RADIATOR FAN RELAY
6. w/ Auto Spoiler:
REINSTALL LH HEADLIGHT
7. w/o Auto Spoiler:
REINSTALL ENGINE UNDER COVER
No.2 Radiator Fan Relay
(ºA.B.S. (TRAC) RELAYº)
RADIATOR FAN RELAY INSPECTION
1. w/ Auto Spoiler:
REMOVE LH HEADLIGHT
2. w/o Auto Spoiler:
REMOVE ENGINE UNDER COVER
3. REMOVE RADIATOR FAN RELAY
4. INSPECT RADIATOR FAN RELAY
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity between
terminals 1 and 6.
(b) Check that there is continuity between terminals 3 and 5.
(c) Check that there is no continuity between terminals 2 and 5.
If continuity is not as specified, replace the relay.
B. Inspect relay operation
(a) Apply battery voltage across terminals 1 and 6.
(b) Usin g an oh mme te r, ch e ck th a t th e re is no co n tin u ity
between terminals 3 and 5.
(c) Check that there is continuity between terminals 2 and 5.
If operation is not as specified, replace the relay.
5. REINSTALL RADIATOR FAN RELAY
6. w/ Auto Spoiler:
REINSTALL LH HEADLIGHT
7. w/o Auto Spoiler:
REINSTALL ENGINE UNDER COVER
± ENGINECOOLING SYSTEMEG±357

SERVICE SPECIFICATIONS
SERVICE DATA
 
 
Thermostat 
 
Valve opening temperature
Valve lift at 95°C (203°F) 
 
80±84°C (176±183°F)
8.5 mm (0.335 in.) or more
 
 
 
Radiator cap 
 
 
Relief valve opening pressure STD
Minimum 
 
 
93±123 kPa
(0.95±1.25 kgf/cm2, 13.5±17.8 psi)
78 kPa (0.8 kgf/cm
2, 11.4 psi)
 
 
Electric
cooling fan 
 
Rotating amperage 
 
2.5±4.5 A
TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
 Engine drain plug x Cylinder block 29 300 22
 Fan x Fluid coupling 7.4 75 65 in.Vlbf
 Water pump x Cylinder block 21 210 15
 Water pump x No.2 water bypass pipe 21 210 15
 Generator x Water pump 37 380 27
 Generator x Cylinder block 37 380 27
 Water bypass outlet x Cylinder head (2JZ±GE) 8.8 90 78 in.Vlbf
 Water outlet x Cylinder head (2JZ±GTE) 21 210 15
 Water inlet x Water pump (2JZ±GE) 8.8 90 78 in.Vlbf
 Water inlet x Water pump (2JZ±GTE) 21 210 15 Upper radiator support x Body 15 155 11 ECT switch x Radiator (2JZ±GTE) 7.4 75 65 in.Vlbf Fluid coupling x Water pump 16 165 12 Oil cooler x Radiator lower tank (A/T) 8.3 85 74 in.Vlbf Oil cooler x Oil cooler pipe (A/T) 15 150 11
EG±358± ENGINECOOLING SYSTEM

Heat the component that is the likely cause of the mal-
function with a hair dryer or similar object. Check to see
if the malfunction occurs.
NOTICE:
(1) Do not heat to more than 60°C (140°F). (Temperature
limit that no damage is done to the component).
(2) Do not apply heat directly to parts in the ECU.
HEAT METHOD: When the problem seems to occur when the suspect area is heated
WATER SPRINKLING METHOD: When the malfunction seems to occur on a rainy
day or in a high±humidity condition.
OTHER: When a malfunction seems to occur when electrical load is excessive.
Sprinkle water onto the vehicle and check to see if the
malfunction occurs.
NOTICE:
(1) Never sprinkle water directly into the engine compart-
ment, but indirectly change the temperature and humidity
by applying water spray onto the radiator front surface.
(2) Never apply water directly onto the electronic compo-
nents.
(Service hint)
If a vehicle is subject to water leakage, the leaked water may
contaminate the ECU. When testing a vehicle with a water leak-
age problem, special caution must be used.
Turn on all electrical loads including th3e heater blower,
head lights, rear window defogger, etc. and check to see
if the malfunction occurs.
± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMSIN±25

18. BRAKE PEDAL
(a) Check that pedal for smooth operation.
(b) Check that the pedal has the proper reserve
distance and freeplay.
(c) Check the brake booster function.
19. BRAKES
At a safe place, check that the brakes do not
pull to one side when applied.
20. PARKING BRAKE
(a) Check that the pedal has the proper travel.
(b) On a safe incline, check that the vehicle is
held securely with only the parking brake
applied.
21. AUTOMATIC TRANSMISSION PARK
MECHANISM
(a) Check the lock release button of the selector
lever for proper and smooth operation.
(b) On a safe incline, check that the vehicle is
held securely with the selector lever in the ºPº
position and all brakes released.
UNDER HOOD
22. WINDSHIELD WASHER FLUID
Check that there is sufficient fluid in the tank.
23. ENGINE COOLANT LEVEL
Check that the coolant level is between the
LEVEL lines on the see±through reservoir at
normal temperature (20°C (68°F)).
24. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean
and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or
loose connections.
25. BATTERY ELECTROLYTE LEVEL
Check the indicator.
When the indicator color is blue, the condition
is satisfactory. A red color indicates that dis-
tilled water must be added, and white indi-
cates that charging is necessary.
26. BRAKE FLUID LEVEL
Check that the brake fluid level is near the up-
per level line on the see±through reservoir.27. ENGINE DRIVE BELT
Check drive belt for fraying, cracks, wear or
oil contamination.
28. ENGINE OIL LEVEL
Check that level on the dipstick with the en-
gine turned off.
29. POWER STEERING FLUID LEVEL
Check the level on the dipstick.
The level should be in the ºHOTº or ºCOLDº
range depending on the fluid temperature.
30. A U TO M AT I C TRANSMISSION FLUID
LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking and
foot brake applied, shift the selector into all
positions from ºPº to ºLº, and then shift into ºPº
position.
(c) Turn and pull out the dipstick and wipe off the
fluid with a clean rag.
Re±insert the dipstick fully and check that the
fluid level is in the ºHOTº range.
(d) Perform this check with the fluid at normal
driving temperature (70±80°C (158±176°F)).
If the level is at the low side, add fluid.
NOTICE: Do not overfill.
HINT: Wait about 30 minutes before checking
the fluid level after extended driving at high
speeds in hot weather, driving in heavy traffic
or with a trailer.
31. EXHAUST SYSTEM
Visually inspect for cracks, holes or loose
supports.
If any change in the sound of the exhaust or
smell of the exhaust fumes is noticed, have
the cause located and correted. MA±18
± MAINTENANCEGENERAL MAINTENANCE

TIMING BELT REMOVAL
1. REMOVE RADIATOR ASSEMBLY
(See radiator removal in Cooling System)
2. 2JZ±GTE M/T:
REMOVE DRIVE BELT TENSIONER DAMPER
Remove the 2 nuts and tensioner damper.
3. REMOVE DRIVE BELT, FAN, FLUID COUPLING
ASSEMBLY AND WATER PUMP PULLEY
(See step 6 in water pump removal in Cooling System)
4. REMOVE NO.3 TIMING BELT COVER
(a) Remove the oil filler cap.
(b) 2JZ±GE:
Using a 5 mm hexagon wrench, remove the 6 bolts and belt
cover.
(c) 2JZ±GTE:
Using a 5 mm hexagon wrench, remove the 10 bolts and belt
cover.
5. REMOVE NO.2 TIMING BELT COVER
Using a 5 mm hexagon wrench, remove the 3 bolts, belt cover
and gasket.
If you are unable to loosen the bolt on the right because the
PS pump pulley interferes with the hexagon wrench, first re-
move the pulley.
6. REMOVE DRIVE BELT TENSIONER
Remove the 3 bolts and tensioner. EG±24
± ENGINEENGINE MECHANICAL

(c) Remove the 1.5 mm hexagon wrench from the tensioner.
14. CHECK VALVE TIMING
(a) Slowly turn the crankshaft pulley 2 revolutions from TDC to
TDC.
NOTICE: Always turn the crankshaft clockwise.
(b) Check that each pulley aligns with the timing marks as shown
in the illustration.
If the marks do not align, remove the timing belt and reinstall
it.
15. INSTALL DRIVE BELT TENSIONER
Install the tensioner with the 3 bolts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
NOTICE: Be careful not to drop the bolts inside the timing belt
cover.
16. INSTALL NO.2 TIMING BELT COVER
17. INSTALL NO.3 TIMING BELT COVER
18. INSTALL WATER PUMP PULLEY, FAN, FLUID COUPLING
ASSEMBLY AND DRIVE BELT
(See step 10 in water pump installation in Cooling Sys-
tem)
19. 2JZ±GTE M/T:
INSTALL DRIVE BELT TENSIONER DAMPER
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
20. INSTALL RADIATOR ASSEMBLY
(See radiator installation in Cooling System)
21. ROAD TEST VEHICLE
Check for abnormal noise, shock, slippage, correct shift
points and smooth operation.
± ENGINEENGINE MECHANICALEG±33