cooling TOYOTA SUPRA 1996 Owners Manual

50
The gauge indicates the engine cool-
ant temperature when the ignition
switch is on. The engine operating
temperature will vary with changes inweather and engine load.
If the needle points to the red zone or high-
er, stop your vehicle and allow the engine
to cool.
Your vehicle may overheat during severe operating conditions, such as: Driving up a long hill on a hot day.
Reducing speed or stopping after high
speed driving.
Idling for a long period with the air con-
ditioning on in stop-and-go traffic.
NOTICE
Do not remove the thermostat in the engine cooling system as this
may cause the engine to overheat. The thermostat is designed tocontrol the flow of coolant to keep
the temperature of the engine within the specified operatingrange.
Do not continue driving with an
overheated engine. See If yourvehicle overheatsº in Part 4.
The tachometer indicates engine speed
in thousands of rpm (revolutions per
minute). Use it while driving to select
correct shift points and to prevent en-
gine lugging and overr evving.
Driving with the engine running too fast
causes excessive engine wear and poor
fuel economy. Remember, in most cases
the slower the engine speed, the greater
the fuel economy.
NOTICE
Do not let the indicator needle get into the red zone. This may cause
severe engine damage.
Tachometer
Engine coolant temperature gauge

99
The automatic air conditioning is an air
conditioning that automatically maintains the set temperature.
This air conditioning features automatic
air intake controls, fan speed and air flow controls which automatically select the
most suitable air intake control, fan speed
and air flow to control the temperature.
You may use manual controls if you desire your own way of setting.
(A) CLIMATE CONTROL Setting operation
1. Turn the temperature control knob at the desired temperature level.
The temperature control knob is used to
set the desired passenger compartment
temperature. The tem
perature of air deliv-
ered to the passenger compartment will
be controlled automatically according to
the setting. The figures on the panel indi-
cate degrees in centigrade or Fahrenheit. 2. Press in the AUTOº button.
As the AUTOº button is pressed in, the fan turns on and operates with the most
suitable air intake control, air flow (except
pressing the FLOOR/WINDSHIELD or
WINDSHIELD button) and fan speed se-lected
automatically according to the tem-
perature. In cold weather, however, the
fan will not operate until the engine cool-
ant warms up sufficiently.
3. If any of the AUTOº button functions is not necessary for your own way of set-
ting, manual control can be made on each
of the functions, leaving the rest of the
functions in operation. Operate the con-
trols as described in Manual control on air
intake, air flow and fan speedº after the
AUTOº button is pressed in.
4. Press in the air conditioning on-off but-
ton.
The air conditioning on-off button is used
to turn on and off the air conditioning.
With the button pressed in the on mode, the air conditioning turns on.
If the system is used for ventilation or
heating in dry weather, press the air con-
ditioning on-off button once again. This
turns off the air conditioning. For year-
round automatic temperature control in-
cluding cooling and dehumidifying opera-
tion, use the air conditioning. 5. Press in the OFFº button turn off thefan speed and temperature control.
Manual control on air intake, air flow
and fan speed
If manual air intake control is de- siredÐ
The air intake control button is used to se-
lect intake air, either outside air or recircu-
lated air. With the button in the OUTSIDE
AIR mode, the OUTSIDE AIR mode indi-
cator light w
ill come on and the system will
take fresh outside air into the unit.
If quick circulation of conditioned air is de- sired, press in the air intake control button
to select the RECIRCULATED AIR mode
for recirculated air. The RECIRCULATED
AIR mode indicator light will come on.
For normal use, it is best to keep the air in-
take control button for outside air. If recir-
culated air is used during heating, the win-
dows will fog up more easily.
If manual air flow selection is de- siredÐ
The air flow outlets from which air is deliv-
ered can be selected manually by press-
ing in the appropriate air flow control but-
ton. The function of each button is as follows:
FACE buttonÐThis button directs the air flow to face level.

100BI-LEVEL buttonÐThis button directs
the air flow to face level and the floor. Ex-
cept in ventilation, the air to the floor is
slightly warmer than that to face level.
FLOOR buttonÐThis button directs the
air flow mostly to the floor.
FLOOR/WINDSHIELD buttonÐThis but- ton directs the air flow to the windshield
and front side windows as well as the floor.
WINDSHIELD buttonÐThis button di-
rects the air flow to the windshield and
front side windows.
Pressing this air flow control button turns
on the air conditioning. This is to clear up
the front view more quickly.
Pressing the air conditioning on-off but-
ton in the off mode turns off the air condi- tioning.
If you push the WINDSHIELD button once
again, it returns to the last air flow button used. Do not use the WINDSHIELD button dur-
ing cooling operation in extremely humid
weather.
The difference between the tem-
perature of the outside air and that of the windshield could cause the outer surface
of the windshield to fog up blocking yourvision. If manual fan speed control is de- siredÐ
The fan speed can be fixed at your desired
speed by turning to the appropriate posi-tion of the fan speed control knob. The
higher
the fan speed is, the more air is de-
livered.
(B) WINDSHIELD DEFOGGING AND DEFROSTING
See (A) CLIMATE CONTROLº for details
on each button or lever function.
To remove interior fog on the wind- shieldÐ
1. Turn the temperature control knob for the desired temperature level.
2. Press in the AUTOº button.
3. Set the air intake control button to the OUTSIDE AIR mode.
4. Press in the WINDSHIELD button of the air flow control buttons.
To remove frost or exterior fog on the windshieldÐ
1. Turn the temperature control knob at the maximum temperature.
2. Set the air intake control button to the OUTSIDE AIR mode.
3. Press in the WINDSHIELD button of the air flow control buttons.
4. Turn the fan speed control knob at the
HIº position. 5. Press the air conditioning on-off but- ton in the OFF mode.
(C) OPERATING TIPS
Be sure the air inlet grilles in front of the
windshield are not blocked by leaves or other obstructions.
If air flow control is not satisfactory,
check the dashboard vents. (See
Dashboard ventsº or Lower ventº.)
To help cool down the interior after
parking in the hot sun, drive for the first
few minutes with the windows open.
After the excess heat has blown away,
close the windows.
When driving on dusty roads, close all
windows. If dust thrown up by the ve-
hicle is still drawn into the vehicle after
closing the windows, it is recom-
mended that the air intake control but-ton be set in the OUTSIDE AIR mode.
If following another vehicle on a dusty
road, or driving in windy and dusty con-
ditions, it is recommended that the air
intake control button be temporarily
set to select the RECIRCULATED AIR
mode, which will close off the outside
passage and prevent outside air and
dust from entering the vehicle interior.

11 0
CAUTION!
Avoid inhaling the engine exhaust.
It contains carbon monoxide,
which is a colorless and odorless
gas. It can cause unconsciousness
or even death.
Make sure the exhaust system has
no holes or loose connections. The
system should be checked from
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the system
checked immediately.
Do not run the engine in a garage or
enclosed area except for the time
needed to drive the vehicle in or
out. The exhaust gases cannot es-
cape, making this a particularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the engine run-
ning. If it is unavoidable, however,
do so only in an unconfined area and adjust the heating or cooling
system to force outside air into the vehicle.
Keep the back door closed while
driving. An open or unsealed back
door may cause exhaust gases to
be drawn into the vehicle. If you
must drive with the back door
open to accommodate a large ob-
ject, close the windows, open all
the instrument panel vents and have the heating or cooling sys- tem deliver fresh air into the ve-
hicle by turning the fan to high
speed with the air intake control
button in the OUTSIDE AIR mode.
To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or
other obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the back door closed.
Have the cause immediately lo-cated and corrected. FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of lu-
bricating and cooling the inside of the en-
gine,
and plays a major role in maintaining
the engine in proper working order. ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are
as follows. Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil is left on the cylinder wall when a piston
moves downwards in the cylinder.
High negative pressure generated
when the vehicle is decelerating sucks
some of this oil into the combustion
chamber. This oil as well as some part
of the oil film left on the cylinder wall is
burned by the high temperature com-
bustion gases during the combustionprocess.
Oil is also used to lubricate the stems
of the intake valves. Some of this oil is
sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem- perature exhaust gases also burn the
oil used to lubricate the exhaust valve stems.
Engine exhaust cautions
Facts about engine oil consumption

151
When the engine is running, keep
hands, clothing, and tools away
from the moving fan and engine
drive belts. (Removing rings,
watches, and ties is advisable.)
Right after driving, the engine
compartmentÐthe engine, radia-
tor, exhaust manifold, power
steering fluid reservoir and spark
plug boots, etc.Ðwill be hot. So be
careful not to touch them. Oil,
fluids and spark plugs may also be
hot.
If the engine is hot, do not remove
the radiator cap or loosen the
drain plugs to prevent burning yourself.
Do not smoke, cause sparks or al-
low open flames around fuel or
the battery. Their fumes are flam- mable.
Be extremely cautious when
working on the battery. It contains
poisonous and corrosive sulfuricacid.
Do not get under your vehicle with
just the body jack supporting it.
Always use automotive jack
stands or other solid supports. CAUTION
!
Be sure that the ignition is off if you
work near the electric cooling fans
or radiator grille. With the ignition
on, the electric cooling fan will au-
tomatically start to run if the engine
coolant temperature is high and/or
the air conditioning is on.
Use eye protection whenever you
work on or under your vehicle
where you may be exposed to fly-
ing or falling material, fluid spray,etc.
Used engine oil contains potential-
ly harmful contaminants which
may cause skin disorders such as
inflammation or skin cancer, so
care should be taken to avoid pro-
longed and repeated contact with
it. To remove used engine oil from
your skin, wash thoroughly with
soap and water.
Do not leave used oil within the reach of children.
Dispose of used oil and filter only
in a safe and acceptable manner.
Do not dispose of used oil and fil-
ter in household trash, in sewers
or onto the ground. Call your deal-
er or a service station for informa-
tion concerning recycling or dis- posal.
Remember that battery and igni-
tion cables carry high currents or
voltages. Be careful of accidental-
ly causing a short circuit.
Add only demineralized or dis-tilled water to fill the radiator. And
if you spill some of the coolant, besure to wash it off with water to
prevent it from damaging the
parts or paint.
Do not overfill automatic trans-mission fluid, or the transmission
could be damaged.
Do not drive with the air cleaner fil-ter removed, or excessive enginewear could result. Also backfiringcould cause a fire in the engine
compartment.
Be careful not to scratch the glasssurface with the wiper frame.
When closing the engine hood,
check to see that you have not for-
gotten any tools, rags, etc.
NOTICE

155
The ILSAC (International Lubricant Stan-
dardization and Approval Committee) Certification Mark is displayed on the front
of the container. Look at the see-through coolant res-
ervoir when the engine is cold. The
coolant level is satisfactory if it is be-
tween the FULLº and LOWº lines on
the reservoir. If the level is low, add
ethylene-glycol type coolant.
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the LOWº line, add
coolant. Bring the level up to the FULLº line. Use only ethylene-glycol type coolant. See information in the next column.
If the coolant level drops within a short
time after replenishing, there may be a
leak in the system. Visually check the ra-
diator, hoses, radiator cap
and drain cock
and water pump.
If you can find no leak, have your Toyota
dealer test the cap pressure and check for
leaks in the cooling system.
To prevent burning yourself, do not remove the radiator cap when the
engine is hot.
CAUTION! Coolant type selection
Your coolant must contain ethylene-gly-
col antifreeze. In addition to preventingfreezing and subsequent damage to the
engine, this will also prevent corrosion. Further supplemental inhibitors or addi-
tives are neither needed nor recom- mended.
Read
the antifreeze container for informa-
tion on freeze protection. Follow the
manufacturer 's directions for how much
to mix with water. The total capacity of the
cooling system is given in Part 8. We rec- ommend 50% solution be used for your
Toyota, or a sufficient quantity to provideprotection to about -35 C (-31 F).
Do not use alcohol type antifreeze
or plain water alone.
NOTICE
Checking the engine coolant level

161
WHEN TO REPLACE YOUR WHEELS
If you have wheel damage such as
bending, cracks or heavy corrosion,
the wheel should be replaced.
If you fail to replace damaged wheels, the
tire may slip off the wheel or they may cause loss of handling control. WHEEL SELECTION
When replacing wheels,
care should be
taken to ensure that the wheels are re- placed by ones with the same load ca-
pacity, diameter, rim width, and offset. This must be observed on compact spare
tires, too.
Correct replacement wheels are available
at your Toyota dealer.
A wheel of a different size or type may ad-
versely affect handling, wheel and bear-
ing life, brake cooling, speedometer/
odometer calibration, stopping ability,
headlight aim, bumper height, vehicle
ground clearance, and tire or snow chainclearance to the body and chassis. Replacement
with used wheels is not rec-
ommended as they may have been sub-jected to rough treatment or high mileageand could fail without warning. Also, bent
wheels which have been straightened
may have structural damage and there-
fore should not be used. Never use an in-
ner tube in a leaking wheel which is de-
signed for a tubeless tire.
After driving your vehicle the first 1600
km (1000 miles), check that the wheel
nuts are tight.
If you have repaired or changed your
tires, check that the wheel nuts are still
tight after driving 1600 km (1000miles).
When using tire chains, be careful not
to damage the aluminum wheels.
Use only the Toyota wheel nuts and
wrench designed for your aluminumwheels.
When balancing your wheels, use only
Toyota balance weights or equivalent
and a plastic or rubber hammer.
As with any wheel, periodically checkyour aluminum wheels for damage. If
damaged, replace immediately.
Replacing wheels
Aluminum wheel precautions

181
COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):
2JZ-GE engineWith manual transmission 7.3 (7.7, 6.4)
With automatic transmission 8.3 (8.8, 7.3)
2JZ-GTE engine With manual transmission
9.5 (10.0, 8.4)
With automatic transmission
9.4 (9.9, 8.3)
Coolant type:
With ethylene-glycol antifreeze (Do not use alcohol type.)
BATTERY Open voltage* at 20 C (68 F):
12.7 V Fully charged
12.3 V Half charged
11.9 V Discharged
*: Voltage that is checked 20 minutes af-
ter the key is removed with all the lights
turned off Charging rates:
5 A max. CLUTCH
Pedal freeplay, mm (in.):
5' 15 (0.2 '0.6)
Fluid type:
SAE J1703 or FMVSS No. 116 DOT 3
MANUAL TRANSMISSION (2JZ-GE engine only)
Oil capacity, L (qt., Imp. qt.):
2.6 (2.7, 2.3) Oil type:
Multipurpose gear oil API GL-4 or GL-5
Recommended oil viscosity:
SAE 75W-90
AUTOMATIC TRANSMISSION Fluid capacity (drain and refill), L (qt., Imp. qt.):
2JZ-GE engine Up to 1.6 (1.7, 1.4)
2JZ-GTE engine Up to 1.9 (2.0, 1.7)
Fluid type: 2JZ-GE engine
Automatic transmission fluid DII or DEXRON )
-II
2JZ-GTE engine Automatic transmission fluidTYPE T-II or equivalent DIFFERENTIAL
Oil capacity, L (qt., Imp. qt.):
1.35 (1.43, 1.19)
Oil type: Hypoid gear oil API GL-5
Recommended oil viscosity: Above -18 5C (0 5F)
SAE 90
Below -18 5C (0 5F)
SAE 80W or 80W-90
BRAKES Minimum pedal clearance when depressed, mm (in.):
2JZ-GE engine 72 (2.8)
2JZ-GTE engine 70 (2.8)
Pedal freeplay, mm (in.):
1Ð6 (0.04Ð0.24)
Pad wear limit, mm (in.):
1.0 (0.04)
Lining wear limit, mm (in.): 1.0 (0.04)
Parking brake adjustment: 5' 8 clicks
Fluid type: SAE J1703 or FMVSS No. 116 DOT 3

18424. RAD NO.1 20 A:
Radio cassette tape
player
25. HEAD (RH) 15 A: Right-hand head-
light
26. HEAD (LH) 15 A: Left-hand head-
light
27. HEAD (RH-LWR) 15 A: Right-hand
headlight (low beam)
28. HEAD (LH-LWR) 15 A: Left-hand
headlight (low beam)
29. HEAD (RH-UPR) 15 A: Right-hand
headlight (high beam)
30. HEAD (LH-UPR) 15 A: Left-hand
headlight (high beam)
31. DRL 7.5 A: Daytime running light sys-
tem
32. 30 A: Spare fuse
33. 7.5 A: Spare fuse
34. 15 A: Spare fuse
35. OBD-II 7.5 A: On-board diagnosis
system
Fuses (type B)
36. DOOR 30 A: Power window, power
door lock system, theft deterrent system
37. DEFOG 30 A: Rear window defogger
Fuses (type C)
38. ALT 120 A: Charging system
39. MAIN 50 A: Starter system, head-
lights
40. HTR 50 A: Air conditioning system
41. FAN 30 A: Electric cooling fan 42. ABS NO.1 60 A:
Anti-lock brake sys-
tem, traction control system
43. AM1 50 A: Electronic ignition system/
distributor ignition system
44. AM1 60 A: Electronic ignition system/
distributor ignition system
45. POWER 60 A: PANELº, STOPº,
TAILº, ECU-B, DEFOGº and DOORº fuses