1997 TOYOTA T100 engine overheat

Publication No. OM34411U
Part No. 01999-34411
Printed in Japan 01- 9608- 00
Quick index If a service reminder indicator or warning buzzer comes on 59 . . . . .
If your vehicle will not start 133
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If your engine stalls while driving 136 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If your vehicle overheats 137
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If you have a flat tire 138
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If your vehicle needs to be towed 146 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips for driving during break- in period 108 . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine 121
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General maintenance 158
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Complete index 209
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Gas station information
Fuel type: UNLEADAD gasoline, Research Octane Number 91
(Octane Rating 87) or higher See page 129 for detailed information.
Fuel tank capacity: 91 L (24 gal., 20.0 lmp. gal.)
Engine oil:
See page 172
Automatic transmission fluid: Automatic transmission fluid D- ll or DEXRON lll (DEXRON ll)
Tire information: See pages 175 through 179.
Tire pressure: See page 198 and 199. P8
B

56
The gauge works when the ignition
switch is on and indicates the approxi-
mate quantity of fuel remaining in the tank.
It is a good idea to keep the tank over 1/4 full.
This fuel gauge has a non-return typ
needle which remains at the last inidi-
cated position when the ignition switch is
turned off.
If the level approaches Eº or the low fuel
level warning light (on some models)
comes on, fill the fuel tank as soon as pos- sible.
If the fuel tank is completely empty, the malfunction indicator lamp comes on. Fill
the fuel tank immediately. The indicator lamp goes off after driving
several times. If the indicator lamp does
not go off, contact your Toyota dealer assoon as possible.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 moves into the red zone, or
higher
stop your vehicle and allow the en-
gine 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.
Towing a trailer
Engine coolant temperature gauge
Fuel gauge(with tachometer)

57
NOTICE
Do not remove the thermostat inthe 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 oil pressure gauge indicates en-
gine oil pressure when the ignition is
on. Check it while driving to make sure
that the needle is in the proper range.
If the oil pressure should stay below the
normal range, pull off the road to a safe
place to stop the engine immediately. Call
a Toyota dealer or qualified repair shop for
assistance.
Oil pressure may not build up when the oil
level is too low. The oil pressure gauge is not designed to indicate oil level, and the
oil level must be checked using the leveldipstick.
NOTICE
Do not drive the vehicle with oil pressure below the normal range
until the cause is fixed-it may ruin the engine.
Oil pressure gauge

66Vehicles with cruise controlÐWhen the
cruise control is being used, even if you
downshift the transmission by turning offthe overdrive switch, engine braking will
not be applied because the cruise control
is not cancelled. For ways to decrease the
vehicle speed, see Cruise controlº in
this
chapter.
Be careful when downshifting on a
slippery surface. Abrupt shifting
could cause the vehicle to spin orskid. CAUTION
!
(c) Using the 2º and Lº positions
The 2º and Lº positions are used for
strong engine braking as described pre-
viously. With the selector lever in 2º or Lº, you
can start the vehicle in motion as with the
lever in Dº. With the selector lever in 2º, the vehicle
will start in the first gear and automatically
shift to the second gear.
With the selector lever in Lº, the trans-
mission is engaged in the first gear.
NOTICE
Be careful not to overrev the en-
gine. Watch the tachometer to
keep engine rpm from going intothe red zone. The approximatemaximum allowable speed for
each position is given below for your reference:Two-wheel drive modelsÐ
2º 100 km/h (62 mph)Lº 55 km/h (34 mph)
Four-wheel drive modelsÐ
ÐFour-wheel drive control lever
in H2º and H4º 2º 100 km/h (62 mph)
Lº 55 km/h (34 mph)
ÐFour-wheel drive control lever in LFº
2º 35 km/h (21 mph)Lº 20 km/h (12 mph)
Do not continue hill climbing for along time in the 2º or Lº posi-tion. This may cause severe auto-matic transmission damage from
overheating. To prevent such damage, use Dº position for hillclimbing or hard towing.
(d) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the selector lever to the
Rº position.
NOTICE
Never shift into reverse while the vehicle is moving.
(e) Parking
1. Bring the vehicle to a complete stop. Pull the parking brake lever up fully to securely apply the parking brake.
With the brake pedal pressed down,
shift the selector lever to the Pº posi- tion.
While the vehicle is moving, never
attempt to move the selector lever
into Pº position under any circum-
stances. Serious mechanical dam-
age and loss of vehicle control mayresult. CAUTION
!

67
(f) Good driving practice
If the transmission is repeatedly up-
shifted and downshifted between third
gear and overdrive when climbing a
gentle slope, the overdrive switch
should be turned off. Be sure to turn the switch on immediately afterward.
When towing a trailer, in order to main-
tain engine braking efficiency, do notuse overdrive.
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping. CAUTION
!
NOTICE
Do not hold the vehicle on an upgrade with the accelerator pedal.
It can cause the transmission tooverheat. Always use the brake pedal or parking brake.
(g) Rocking your vehicle if stuck
If you rock your vehicle to make it
out when it becomes stuck in snow,
mud, sand, etc., first check that
there is no physical object or people
around the vehicle. During opera-
tion, the vehicle may suddenly
move forward or backward causing
injury or damage to nearby people
or objects. CAUTION
!
NOTICE
If you rock your vehicle, observe the following precautions to prevent
damage to the transmission andother parts.
Do not depress the acceleratorpedal while shifting the selector
lever or before the transmission is
completely shifted to forward or
reverse gear.
Do not race the engine and avoidspinning the wheels.
If your vehicle remains stuck after
rocking the vehicle several times,
consider other ways such as tow-ing.

111
A large amount of unburned gasesflowing into the three-way
catalytic converter may cause it tooverheat and create a fire hazard. To prevent this and other damage,observe the following precautions:
Use only unleaded gasoline.
Do not drive with an extremelylow fuel level; running out of fuelcould cause the engine to mis-
fire, creating an excessive load
on the three-way catalytic con-verter.
Do not allow the engine to run at
idle speed for more than 20 min-utes.
Avoid racing the engine.
Do not push-start or pull-startyour vehicle.
Do not turn off the ignition while
the vehicle is moving.
NOTICEKeep your engine in good run-ning order. Malfunctions in the
engine electrical system, elec-tronic ignition system/distributorignition system or fuel systems
could cause an extremely high
three-way catalytic convertertemperature.
If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check-up as soon
as possible. Remember, your
Toyota dealer knows your vehicleand its three-way catalytic
converter system best.
To ensure that the three-way cat-alytic converter and the entire
emission control system operate
properly, your vehicle must re-ceive the periodic inspections re-
quired by the Toyota Maintenance
Schedule. For scheduled mainte- nance information, refer to the
separate Owner's Manual Sup- plement/Maintenance Scheduleº.
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 areaand adjust the heating or cooling
system to force outside air into the vehicle.
Engine exhaust cautions

122Before starting the engine, be sure to fol-
low the instructions in (a) Before crank- ingº.
Normal starting procedure
The multiport fuel injection system/se-
quential multiport fuel injection system in
your engine automatically controls the
proper air-fuel mixture for starting. You can start a cold or hot engine as follows:
1. With your foot off the accelerator ped-
al, crank the engine by turning the key
to STARTº. Release it when the en-
gine starts.
2. After the engine runs for about 10 sec-
onds, you are ready to drive.
If the weather is below freezing, let the en-
gine warm up for a few minutes before driving.
If the engine stalls...
Simply restart it, using the correct proce- dure given in normal starting. If the engine will not startÐ
See If your vehicle will not startº in Part 4.
Do not crank for more than 30
sec-
onds at a time. This may overheat
the starter and wiring systems.
Do not race a cold engine.
If the engine becomes difficult to
start or stalls frequently, have theengine checked immediately.
NOTICE Always slow down in gusty cross- winds. This will allow you much bettercontrol.
Drive slowly onto curbs and, if pos-
sible, at a right angle. Avoid drivingonto high, sharp-edged objects and
other road hazards. Failure to do so
can lead to severe tire damage result-
ing in tire bursts.
When parking on a hill, turn the front
wheels until they touch the curb so that
the vehicle will not roll. Apply the park-
ing brake, and place the transmission in Pº (automatic) or in first or reverse
(manual). If necessary, block thewheels.
Washing your vehicle or driving
through deep water may get the
brakes wet. To see whether they are
wet, check that there is no traffic near
you, and then press the pedal lightly. If
you do not feel a normal braking force,
the brakes are probably wet. To dry
them, drive the vehicle cautiously
while lightly pressing the brake pedal
with the parking brake pulled. If they
still do not work safely, pull to the side
of the road and call a T oyota dealer for
assistance.
(b) Starting the engine
Tips for driving in various conditions

123

Four-wheel drive modelsÐToyota
recommends not using four-wheel
drive on dry hard-surfaced roads, be-
cause four-wheel driving will causeunnecessary noise and wear, and poor
fuel economy.
Four-wheel drive modelsÐIn cold
temperatures, noise may occur when
driving in two-wheel drive before the
transfer is warmed up. Therefore, first
drive in four-wheel drive until the
transfer is warmed up.
CAUTION
Before driving off, make sure that the parking brake if fully released
and the parking brake reminder
light is off.
Do not leave your vehicle unat-
tended while the engine is running.
Do not rest your foot on the brake
pedal while driving. It can cause
dangerous overheating, needless
wear, and poor fuel economy.!
To drive down a long or steep hill, reduce your speed and downshift.
Remember, if you ride the brakes
excessively, they may overheat and
not work properly.
Be careful when accelerating, up-
shifting, down shifting or braking
on a slippery surface. Sudden ac-
celeration or engine braking, could cause the vehicle to spin or skid.
Do not drive in excess of the speed
limit. Even if the legal speed limit
permits it, do not drive over 140
km/h (85 mph) unless your vehicle
has high-speed capability tires.
Driving over 140 km/h (85 mph) may
result in tire failure, loss of control
and possible injury. Be sure to con-
sult a tire dealer to determine
whether the tires on your vehicle
are high-speed capability tires or
not before driving at such speeds. Do not continue normal driving
when the brakes are wet. If they are
wet, your vehicle will require a lon-ger stopping distance, and it may
pull to one side when the brakes are
applied. Also, the parking brake
will not hold the vehicle securely.