2001 TOYOTA 4RUNNER cooling

’01 4Runner_U (L/O 0008)
932001 4RUNNER (OM35768U)
Idling for a long period with the air
conditioning on in stopandgo traffic.
Towing a trailer.
NOTICE
Do not remove the thermostat in
the engine cooling system as this
may cause the engine to overheat.
The thermostat is designed to con-
trol the flow of coolant to keep the
temperature of the engine within
the specified operating range.
Do not continue driving with an
overheated engine. See “If your ve-
hicle overheats” in Section 4.
Tachometer
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 overrevving.
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.
Odometer and two trip meters
This meter displays the odometer and
two trip meters.
1. Odometer—Shows the total distance
the vehicle has been driven.
2. Two trip meters—Show two different
distances independently driven since
the last time each trip meter was set
to zero.
You can use one trip meter to calculate
the fuel economy and the other to
measure the distance on each trip. All
trip meter data is cancelled if the elec-
trical power source is disconnected.
3. Trip meter reset knob—Resets the two
trip meters to zero, and also change
the meter display.
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’01 4Runner_U (L/O 0008)
1572001 4RUNNER (OM35768U)
Fan speed selector
Move the knob to adjust the fan speed—to
the right to increase, to the left to de-
crease.
Temperature selector
Move the knob to adjust the tempera-
ture—to the right to warm, to the left to
cool.
Air flow selector
Move the knob to select the vents used
for air flow.
1. Panel—Air flows mainly from the
instrument panel vents.
2. Bilevel—Air flows from both the floor
vents and the instrument panel vents.
3. Floor—Air flows mainly from the floor
vents.
It is recommended to close the lower
vent. For details about it, see “Instru-
ment panel vents” in this section.4. Floor/Windshield—Air flows mainly
from the floor vents and windshield
vents.
Turning the air flow selector to the
floor/windshield position turns on the
defogging function with the purpose of
clearing the front view.
This position allows the air intake to
select FRESH automatically. This is to
clean up the front view more quickly.
If you want to return the setting to
RECIRCULATE mode, press the air in-
take selector button once again.
Vehicle with “A/C” button—
Press the “A/C” button for dehumidified
heating or cooling. This setting clears
the front view more quickly.
It is recommended to close the lower
vent. For details about it, see “Instru-
ment panel vents” in this section.
5. Windshield—Air flows mainly from the
windshield vents.
Turning the air flow selector to the
windshield position turns on the defog-
ging function with the purpose of clear-
ing the front view.
This position allows the air intake to
select FRESH automatically. This is to
clean up the front view more quickly.
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’01 4Runner_U (L/O 0008)
1582001 4RUNNER (OM35768U)
If you want to return the setting to
RECIRCULATE mode, press the air in-
take selector button once again.
Vehicle with “A/C” button—
Press the “A/C” button for dehumidified
heating or cooling. This setting clears
the front view more quickly.
It is recommended to close the lower
vent. For details about it, see “Instru-
ment panel vents” in this section.
For details about air flow selector settings,
see the illustration after “A/C” button.
Air intake selector
Press the button to select the air source.
1. Recirculate—Recirculates the air inside
the vehicle.
2. Fresh—Draws outside air into the sys-
tem.
To prevent fogging up of the windshield,
the air intake mode may change automati-
cally to FRESH depending on the condi-
tion of the air conditioning system.“A/C” button
To turn on the air conditioning, press the
“A/C” button. The “A/C” button indicator
will come on. To turn the air conditioning
off, press the button again.
If the “A/C” button indicator flashes, there
is a problem in the air conditioning system
and the air conditioning automatically
shuts off. If this happens, take your ve-
hicle to a Toyota dealer for service.
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’01 4Runner_U (L/O 0008)
1602001 4RUNNER (OM35768U)
If following another vehicle on a dusty
road, or driving in windy and dusty
conditions, it is recommended that the
air intake selector be temporarily set to
RECIRCULATE, which will close off the
outside passage and prevent outside
air and dust from entering the vehicle
interior.Heating
For best results, set controls to:
Fan speed—Any setting except “OFF”
Temperature—To w a r d s WARM
(red zone)
Air intake—FRESH (outside air)
Air flow—FLOOR
Lower vent—CLOSED
Air conditioning—OFF
For quick heating, select recirculated
air for a few minutes. To keep the
windows from fogging, select fresh af-
ter the vehicle interior has been
warmed.
Press the “A/C” button on for dehumidi-
fied heating.
Choose floor/windshield air flow to heat
the vehicle interior while defrosting or
defogging the windshield.Air conditioning
For best results, set controls to:
Fan speed—Any setting except “OFF”
Temperature—To w a r d s COLD
(blue zone)
Air intake—FRESH (outside air)
Air flow—PANEL
Air conditioning—ON
For quick cooling, move the air intake
selector to recirculate for a few min-
utes.
Ventilation
For best results, set controls to:
Fan speed—Any setting except “OFF”
Temperature—To w a r d s COLD
(blue zone)
Air intake—FRESH (outside air)
Air flow—PANEL
Air conditioning—OFF
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’01 4Runner_U (L/O 0008)
1612001 4RUNNER (OM35768U)
Defogging
The inside of the windshield
For best results, set controls to:
Fan speed—Any setting except “OFF”
Temperature—To w a r d s WARM
(red zone) to heat;
COLD (blue zone)
to cool
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
Lower vent—CLOSED
Turning the air flow selector to the wind-
shield or floor/windshield position turns on
the defogging function with the purpose of
clearing the front view.
When turning the air flow selector to wind-
shield or floor/windshield position, the air
intake selects FRESH automatically. This
is to clean up the front view more quickly.
If you want to return the setting to RE-
CIRCULATE mode, press the air intake
selector button once again.
Vehicles with “A/C” button—
Press the “A/C” button for dehumidified
heating or cooling. This setting clears the
front view more quickly.
On humid days, do not blow cold air
on the windshield—the difference be-
tween the outside and inside tempera-
tures could make the fogging worse.
Defrosting
The outside of the windshield
For best results, set controls to:
Fan speed—Any setting except “OFF”
Temperature—To w a r d s WARM
(red zone)
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
Lower vent—CLOSED
Turning the air flow selector to the wind-
shield or floor/windshield position turns on
the defrosting function with the purpose of
clearing the front view.
When turning the air flow selector to wind-
shield or floor/windshield position, the air
intake selects FRESH automatically. This
is to clean up the front view more quickly.
If you want to return the setting to RE-
CIRCULATE mode, press the air intake
selector button once again.Vehicles with “A/C” button—
Press the “A/C” button for dehumidified
heating. This setting clears the front view
more quickly.
To heat the vehicle interior while de-
frosting the windshield, choose floor/
windshield air flow.
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’01 4Runner_U (L/O 0008)
1632001 4RUNNER (OM35768U)
“AUTO” button
For automatic operation of the air condi-
tioning, press the “AUTO” button. An indi-
cator light will illuminate to show that the
automatic operation mode has been se-
lected.
In the automatic operation mode, the air
conditioning selects the most suitable fan
speed, air flow, air intake and onoff of
the air conditioning according to the tem-
perature.
When you adjust the temperature selector
button to maximum cooling, a “MAX
COLD” message will appear on the display
and the air intake mode will be automati-
cally changed to RECIRCULATE.
You may use manual controls if you want
to select your own settings.
To turn off the automatic operation, press
the “OFF” button.
Fan speed selector
Turn the knob to adjust the fan speed.
In automatic operation, you do not have
to adjust the fan speed unless you desire
another fan speed mode.Temperature selector
Turn the knob to adjust the temperatu-
re—to the right to warm, to the left to
cool.
“OFF” button
Push the button to turn off the air condi-
tioning system.
Air flow selector, “MODE” button
Press the button to select the vents used
for air flow.
In automatic operation, you do not have
to select the air flow unless you desire
another air flow mode.
1. Panel—Air flows mainly from the
instrument panel vents.
2. Bilevel—Air flows from both the floor
vents and the instrument panel vents.
3. Floor—Air flows mainly from the floor
vents.
It is recommended to close the lower
vent. For details about it, see “Instru-
ment panel vents” in this section.
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’01 4Runner_U (L/O 0008)
1672001 4RUNNER (OM35768U)
If following another vehicle on a dusty
road, or driving in windy and dusty
conditions, it is recommended that the
air intake selector be temporarily set to
RECIRCULATE, which will close off the
outside passage and prevent outside
air and dust from entering the vehicle
interior.Heating
For best results, set controls to:
—For automatic operation
Press in the “AUTO” button.
Temperature—To the desired
temperature
Air conditioning—OFF
—For manual operation
Fan speed—To the desired fan speed
Temperature—To w a r d s WARM
(to the right)
Air intake—FRESH (outside air)
Air flow—FLOOR
Lower vent—CLOSED
Air conditioning—OFF
For quick heating, select recirculated
air for a few minutes. To keep the
windows from fogging, select fresh af-
ter the vehicle interior has been
warmed.
Press the “A/C” button on for dehumidi-
fied heating.
Choose floor/windshield air flow to heat
the vehicle interior while defrosting or
defogging the windshield.Air conditioning
For best results, set controls to:
—For automatic operation
Press in the “AUTO” button.
Temperature—To the desired
temperature
Air conditioning—ON
—For manual operation
Fan speed—To the desired fan speed
Temperature—To w a r d s COLD
(to the left)
Air intake—FRESH (outside air)
Air flow—PANEL
Air conditioning—ON
For quick cooling, select recirculated
air for a few minutes.
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’01 4Runner_U (L/O 0008)
1952001 4RUNNER (OM35768U)
Engine exhaust cautions
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
escape, 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 and back win-
dow closed while driving. An open
or unsealed back door and back
window, may cause exhaust gases
to be drawn into the vehicle.
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 oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the back door and back
window closed. Have the cause im-
mediately located and corrected.
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining 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 pis-
ton 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 combustion
gases during the combustion process.
Facts about engine oil
consumption
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