1997 TOYOTA 4RUNNER maintenance

Publication No. OM35694U
Part No. 01999-35694
Printed in Japan 01- 9705- 00
Quick index If a service reminder indicator or warning buzzer comes on 65 . . . . .
If your vehicle will not start 161
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If your engine stalls while driving 164 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If your vehicle overheats 165
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If you have a flat tire 166
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If your vehicle needs to be towed 172 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips for driving during break- in period 136 . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine 149
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General maintenance 186
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Complete index 227
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Gas station information
Fuel type: UNLEADED gasoline, Octane Rating 87 (Research Octane Number
91) or higher.
For improved vehicle performance, the use of premium unleaded
gasoline with an Octane Rating of 91 (Research Octane Number
96) or higher is recommended.
See page 136 for detailed information.
Fuel tank capacity: 70 L (18.5 gal., 15.4 lmp. gal.)
Engine oil: API SH, ''Energy- Conserving II'' or ILSAC multigrade engine oil
is recommended.
See page 200 for detailed information.
Tire information: See pages 203 through 206.
Tire pressure: See page 221. U
7
I

136
CAUTION!
When driving off-road or in rugged
terrain, do not drive at excessive
speeds, jump the vehicle, or strike
objects, etc. This may cause loss of
control or vehicle rollover. You are
also risking expensive damage to
your vehicle's suspension and chassis. Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
break-in. But following a few simple tips
for the first 1600 km (1000 miles) can add
to the future economy and long life of your vehicle:
Do not drive over 88 km/h (55 mph).
Run the engine at moderate speed be- tween 2000 and 4000 rpm.
Avoid full-throttle starts.
Try to avoid hard stops during the first
300 km (200 miles).
Do not drive slowly with the manual
transmission in a high gear.
Do not drive for a long time at any
single speed, either fast or slow.
Do not tow a trailer during the first 800
km (500 miles) FUEL TYPE
Your new vehicle must use only un-
leaded gasoline.
To help prevent gas station mixups, your
Toyota has a new smaller fuel tank opening.
The special nozzle on pumps with unleaded
fuel will fit it, but the larger standard nozzle
on pumps with leaded gas will not.
Do not use leaded gasoline. Use of
leaded gasoline will cause the
three-way catalytic converter tolose its effectiveness and the emis- sion control system to function im-properly. Also, this can increase maintenance costs.
NOTICE
OCTANE NUMBER
Select Research Octane Number 91 (Oc-
tane Rating 87) or higer.
Use of unleaded fuel with an octane num- ber or rating lower than stated above will
cause persistant heavy knocking. If se-
vere, this will lead to engine damage.
Break-in period Fuel

139
Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic igni-tion system/distributor ignitionsystem or fuel systems could
cause an extremely high three- way catalytic converter tempera-ture.
If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check-up as soon
as possible. Remember, your To-yota dealer knows your vehicleand its three-way catalytic con-
verter system best.
To ensure that the three-way cata-lytic converter and the engine
emission control system operateproperly, 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 ex-
haust. It contains carbon monox-
ide, which is a colorless and odor-
less gas. It can cause uncon-
sciousness or even death.
Make sure the exhaust system
has no holes or loose connec-
tions. 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 paticularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the engine
running. If it is unavoidable, how-
ever, 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. If you
must drive with the trunk lid open
to accommodate a large object,
close the windows, open all the in- strument panel vents and have the
heating or cooling system deliver fresh air into the vehicle by turning
the fan to high speed with the air
intake control set at the outside air position.
To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the wind-
shield cl ear 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.
Engine exhaust cautions

140
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of lubri-
cating and cooling the inside of the engine,
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 isleft 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.
The amount of engine oil consumed de-
pends on the viscosity of the oil, the
quality of the oil and the conditions the
vehicle is driven under.
More oil is consumed by high- speed driving
and frequent acceleration and deceleration.
A new engine consumes more oil, since its
pistons, piston rings and cylinder walls have
not become conditioned.
When judging the amount of oil con-
sumption, note that the oil may become
diluted and make it difficult to judge the
true level accurately.
As an example, if a vehicle is used for re-
peated short trips, and consumes a normal
amount of oil, the dipstick may not show
any drop in the oil level at all, even after
1000 km (600 miles) or more. This is be-
cause the oil is gradually becoming diluted
with the fuel or moisture, making it appear
that the oil level has not changed. The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an expressway, making itappear that oil is excessively consumed
after driving as high speeds.
IMPORTANCE OF ENGINE OIL LEVEL CHECK
One of the most important points in proper vehicle maintenance is to keep the engine
oil at the optimum level so that oil function
will
not be impaired. Therefore, it is essen-
tial that the oil level be checked regularly.
Toyota recommends that the oil level be checked every time you refuel the vehicle.
NOTICE
Failure to check the oil level regularly could lead to serious
engine trouble due to insufficientoil.
For detailed information on the oil level
check, see Checking the engine oil levelº
in Chapter 7-2.
Facts about engine oil consumption

152
CAUTION!
Always observe the following
precautions to minimize the risk of
serious personal injury or damage
to your vehicle: Drive carefully when off the road. Do not take unnecessary risks by
driving in dangerous places.
Do not grip the steering wheel
spokes when driving off-road. A
bad bump could jerk the wheel and
injure your hands. Keep both
hands and especially your thumbs
on the outside of the rim.
Always check your brakes for ef-fectiveness immediately after driv-
ing in sand, mud, water or snow.
After driving through tall grass,
mud, rock, sand, rivers, etc., check
that there is no grass, bush, paper,
rags, stone, sand etc. adhering or
trapped on the underbody. Clear
off any such matter from the un-
derbody. If the vehicle is used with these materials trapped or adher-
ing to the underbody, a breakdown
or fire could occur.The driver and all passengers
should fasten their seat belts
whenever the vehicle is moving.

If driving through water, such as when crossing shallow streams,
first check the depth of the waterand the bottom of the river bed
for firmness. Drive slowly andavoid deep water.
Take all necessary safety mea-sures to ensure that water dam-
age to the engine or other compo-nents does not occur.
Water entering the engine air in-take will cause severe enginedamage.
Water can wash the grease fromwheel bearings, causing rustingand premature failure, and may
also enter the differential,transmission and transfer case,
reducing the gear oil's lubricating
qualities.
NOTICE
Sand and mud that has accumu- lated in brake drums and around
brake discs may affect braking ef-ficiency and may damage brake
system components.
Always perform a maintenance in-
spection after each day of off-road driving that has taken you
through rough terrain, sand, mud,
or water. For scheduled mainte-
nance information, refer to theseparate Owner's Manual Sup-
plement/Maintenance Scheduleº.

156
TIRES
Ensure that your vehicle's tires are
properly inflated. See Chapter 7-2 forinstructions.
The trailer tires should be inflated to
the pressure recommended by the
trailer manufacturer in respect to the
total trailer weight.
TRAILER LIGHTS Trailer lights must comply with federal,
state/provincial and local regulations. See your local recreational vehicle
dealer or rental agency for the correct type of wiring and relays for your trail-
er. Check for correct operation of the
turn signals and stop lights each time
you hitch up. Direct splicing may dam-
age your vehicle's electrical system
and cause a malfunction of your lights.
BREAK-IN SCHEDULE Toyota recommends that you do not
tow a trailer with a new vehicle or a ve-
hicle with any new power train compo-
nent (engine, transmission, differen- tial, wheel bearing, etc.) for the first
800 km (500 miles) of driving. MAINTENANCE
If you tow a trailer, your vehicle will re-
quire more frequent maintenance due
to the additional load. For this informa-
tion, please refer to the scheduled
maintenance information in the Own-
er 's Manual Supplement/Maintenance Scheduleº.
Retighten all fixing bolts of the towing
ball and bracket after approximately
1000 km (600 miles) of trailer driving.
PRE-T OWING SAFETY CHECK Check that your vehicle remains level
when a loaded or unloaded trailer is
hitched. Do not drive if the vehicle has
an abnormal nose-up or nose-down
condition, and check for improper
tongue load, overload, worn suspen-
sion or other possible causes.
Make sure the trailer cargo is securely
loaded so that it cannot shift.
Check that your rear view mirrors con-
form to any applicable federal, state/
provincial or local regulation. If not,
install the rear view mirrors required
for towing purpose. TRAILER TOWING TIPS
When towing a trailer, your vehicle will
handle differently than when not tow-
ing.
The three main causes of vehicle-
trailer accidents are driver error, ex-
cessive speed and improper trailer
loading. Keep these in mind when tow-
ing: Before starting out, check operation of
the lights and all vehicle-trailer con-
nections. After driving a short dis-
tance, stop and recheck the lights and
connections. Before actually towing a
trailer, practice turning, stopping and
backing with a trailer in an area away
from traffic until you learn the feel.
Backing w ith a trailer is difficult and re-
quires practice. Grip the bottom of thesteering wheel and move your hand to
the left to move the trailer to the left. Move your hand to the right to move
the trailer to the right. (This procedure is generally opposite to that when
backing without a trailer). Also, just
turn the steering wheel a little at a time,
avoiding sharp or prolonged turning. Have someone guide you when back-
ing to reduce the risk of an accident.

159

Avoid continuous speeding up and
slowing down. Stop-and-go driving
wastes fuel.
Avoid unnecessary stopping andbraking. Maintain a steady pace. Try
to time the traffic signals so you only
need to stop as little as possible or take
advantage of through streets to avoid
traffic lights. Keep a proper distance
from other vehicles to avoid sudden braking. This will also reduce wear on your brakes.
Avoid heavy traffic or traffic jams
whenever possible.
Do not rest your foot on the clutch
or brake pedal. This causes needless
wear, overheating and poor fuel econ-
omy.
Maintain a moderate speed on highways. The faster you drive, the
greater the fuel consumption. By re-
ducing your speed, you will cut down
on fuel consumption.
Keep the front wheels in proper alignment. Avoid hitting the curb and
slow down on rough roads. Improper
alignment not only causes faster tire
wear but also puts an extra load on the
engine, which, in turn, wastes fuel.
Keep the bottom of your vehicle
free from mud, etc. This not only
lessens weight but also helps preventcorrosion.
Keep your vehicle tuned-up and in
top shape. A dirty air cleaner, improp-
er valve clearance, dirty plugs, dirty oil
and grease, brakes not adjusted, etc.
all lower engine performance and con-
tribute to poor fuel economy. For lon-
ger life of all parts and lower operating
costs, keep all maintenance work on
schedule, and if you often drive under severe conditions, see that your ve-
hicle receives more frequent mainte-
nance (For scheduled maintenance in-
formation, please refer to the separate
Owner 's Manual Supplement/Main-
tenance Scheduleº).
CAUTION!
Never turn off the engine to coast
down hills. Your power steering and brake booster will not function with-
out the engine running. Also, the
emission control system operates
properly only when the engine isrunning.

Part 6Maintenance requirements
185
VEHICLE MAINTENANCEAND CARE
Maintenance requirements
General maintenance
Does your vehicle need repairing?
For scheduled maintenance infor-
mation, please refer to the sep-
arate Owner's Manual Supple-ment/Maintenance Scheduleº.
Your Toyota vehicle has been designed to
for fewer maintenance requirements with longer service intervals to save both your
time and money. However, each regular
maintenance, as well as day-to-day
care, is more important than ever before
to ensure smooth, and trouble-free, safe,
and economical drivings.
It is the owner's responsibility to make sure
the specified maintenance, including
general maintenance service, is per-
formed. Note that both the new vehicle
and emission control system warranties
specify that proper maintenance and care
must be performed. See Owner's Guide,
Owner 's Manual Supplement or W arranty
Booklet for complete warranty informa- tion.
General maintenance General maintenance items are those
day-to-day care practices that are impor-
tant to your vehicle for proper operation.
It is the owner's responsibility to ensure
that the general maintenance items are
performed regularly.
These checks or inspections can be done
either by yourself or a qualified technician,
or if you prefer, your Toyota dealer will be
pleased to do them at a nominal cost. Scheduled maintenance
The scheduled maintenance items listed
in the Owner's Manual Supplement/
Maintenance Scheduleº are those re-
quired to be serviced at regular intervals.
For details of your maintenance Sched-
ule, read the separate ºOwner's Manual
Supplement/Maintenance Scheduleº.
It is recommended that any replace-
ment parts used for maintenance or
for the repair of the emission control
system be Toyota supplied.
The owner may elect to use non-Toyo- ta supplied parts for replacement pur-
poses without invalidating the emis-
sion
control system warranty. Howev-
er, use of replacement parts which are
not of equivalent quality may impair
the effectiveness of the emission con-
trol systems.
You may also elect to have mainte-
nance, replacement, or repair of the
emission control devices and system
performed by any automotive repair
establishment or individual without
invalidating this warranty. See Own-
er's Guide, Owner's Manual Supple-
ment or Warranty Booklet for complete
warranty information.