control arm HONDA CIVIC 1991 Owner's Manual

Your Honda automobile must be properly maintained to ensure that
it is in peak operating condition and the emission levels are within
the standards set by the Federal Clean Air Act. The following instructions and maintenance procedures are basedon the assumption that your car will be used exclusively for thepurpose for which it was designed:
1.To carry passengers and cargo within the load limits shown on the label in the glove box.
2. To be driven on reasonable road surfaces within legal limits.
3. To generally be driven daily over a distance of several miles.
4. Use gasoline from pumps labeled unleaded, with a pump octane number of 86 or higher. The pump octane number is an average of
the Research (R) octane and Motor (M) octane numbers.
NOTE: Failures which occur due to a lack of maintenance will not be
covered under warranty.
The Required Maintenance Schedule* specifies all maintenance
required to keep your car in peak operating condition. Work should
be done by a Honda dealer but may be done by any qualified service

facility or individual who is competent in this type of work.

Maintenance, replacement, or repair of emission control devices
and systems may be done by any automotive repair establishment
or individual using parts that are "certified" to EPA standards.
After the maintenance has been done, be sure to complete theMaintenance Records on pages 71 — 73. All required maintenance is
considered normal owner operating cost and you will be charged for it by your dealer.
* For vehicles sold in California, maintenance operations indicated by *3 on page 70 are recommended by the manufacturer. Othermaintenance operations are required by California regulations and
condition the emission warranty.
Maintenance Schedule and RecordsProCarManuals.comMain Menu s t

Cooling System (cont'd)
1. Set the heater temperature control dial to maximum heat.
2. Remove the radiator cap, splash shield and drain plug when the radiator is cool, and drain the radiator.
3. Remove the drain bolt from the front side of the cylinder block,and drain the engine and heater.
4. Apply non-hardening sealant to the drain bolt threads, then rein-stall the bolt and tighten it se-

curely.

5. Tighten the radiator drain plug se-
curely.

6. Mix the recommended antifreeze with an equal amount of low-mineral or distilled water and fill
the reservoir to maximum, as illustrated.
7. Loosen the air bleed bolt in the thermostat housing, then fill the radiator to the filler neck with the coolant mixture. Tighten the
bleed bolt as soon as coolant starts to run out in a steady stream

without bubbles.

8. With the radiator cap off, start the engine and let it run until warmed up (fan goes on at least twice). Then, if necessary, addmore coolant mix to bring the level back up to the filler neck.
9. Put the radiator cap on, then run the engine again and check for
leaks.
RADIATOR

CAP

BLEED BOLT

DRAIN BOLT
DRAIN PLUG
Fill to

here
FILLER
NECK
Fill to here

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Fuse Replacement
The fuse box is located under the dashboard on the driver's side.
The circuits protected by each fuse are listed inside the box.
Hatchback

Sedan

(Sedan)

The fuses for automatic shoulder belt buckle motor are installed on the terminal of the battery.
If any of your car's lights, accessories, or controls don't work,
check their fuses. If a fuse has blown, the wire inside it will be burned through.
BLOWN FUSE
REMOVER

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Spare Tire
COMPACT Spare Tire
Your car is supplied with a COMPACT spare tire and wheel for

temporary use only in the event of a flat tire. Use the COMPACT
spare only when you have to, and only to go as far as the next
garage or dealer to have the regular tire repaired and reinstalled.
Because you will rarely use the COMPACT spare, be sure to
regularly check its condition and air pressure (415 kPa, 60 psi), so it
will be ready when you need it. This type of tire holds less air at
higher pressure than a regular tire, so it will inflate (or deflate if there is a leak) more rapidly; check its pressure often and add air gradually
if it needs any.
The COMPACT spare tire has adifferent tire size, air pressure re-
quirement, tread life and maxi- mum speed rating than the four
regular tires on your car. Disre-
garding these warnings may re-
sult in tire failure, loss of vehicle
control and possible injury to
vehicle occupants.Do not exceed 50 mph (80 km/h)
under any circumstances when
using the COMPACT spare.
Do not mount snow chains on the COMPACT spare. They will
not fit properly and will damage the tire and possibly your car. Ifyou must use the COMPACT spare when driving on roads
covered with snow or ice, use it as one of the rear tires and
mount chains only on the front two regular tires.ProCarManuals.comMain Menu s t

If towing is necessary, contact a professional towing service. Your
authorized Honda dealer can assist you with detailed towing

instructions.

Never use tow chains or rope to tow a car; your ability to safely
control the car may be adversely affected.
We recommend the following: Flat Bed Equipment —Entire car is winched on a flat bed vehicle.
This is the best way of transporting your Honda.
Wheel Lift Type—Tow with the front wheels off the ground.

If the car can only be towed with the front wheels on the ground:

make sure the transmission is full of fluid (see pages 78 — 79) and
tow with the transmission in neutral (N) and the ignition key in the 1
position.

CAUTION:

To avoid serious damage on automatic transmission cars, first
start the engine and shift to D4, then to N and shut the engine off. If the engine does not run or the transmission cannot be shifted
while the engine is running, the car must be transported on flat
bed equipment.
Check local regulations for towing.

CAUTION:
Do not exceed 35 mph (55 km/h) or tow for distances of more
than 50 miles (80 km).
If a sling type tow is used, the tow truck driver should position
wood spacer blocks between your car's frame and the chains
and lift straps to avoid damaging the bumper and the body. Do not use the bumpers to lift the car or to support the car's
weight while towing. TowingProCarManuals.comMain Menu s t

DOT Tire Quality Grades
The tires on your car meet Federal Safety Requirements. All tires are also "graded" according to Department of Transportation (DOT)
standards for tread wear, traction and temperature.
Tread Wear
The tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified
government test course. For example, a tire graded 150 would wear
one and one half (1-1/2) times as well on the government course as
a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from
the norm due to variations in driving habits, service practices and differences in road characteristics and climate.

Traction
The traction grades, from highest to lowest, are A, B, and C, andthey represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test
surfaces of asphalt and concrete. A tire marked C may have poor

traction performance.

The traction grades assigned are based on braking (straight ahead)
traction tests and do not include cornering (turning) traction. Three grades
are shown on the
tire sidewall

TIRE

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Temperature

The temperature grades are A (the highest), B and C representing
the tire's resistance to the generation of heat and its ability to
dissipate heat when tested under controlled conditions on a
specified indoor laboratory test wheel. Sustained high temperaturecan cause the material of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on
the laboratory test wheel than the minimum required by law.
The tire temperature grade is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination, can cause
heat buildup and possible tire failure.ProCarManuals.comMain Menu s t

Emission Controls

Sources of Emissions
The combustion process produces carbon monoxide, oxides of nitrogen and hydrocarbons. The evaporation of fuel in the fuel tank
also produces hydrocarbons. Control of oxides of nitrogen andhydrocarbons is very important since, under certain conditions,
when subjected to sunlight, they react to form photochemical smog. Carbon monoxide does not react to form smog, but it is toxic.Honda Motor Co., Ltd. has developed a number of systems which
are highly effective in reducing carbon monoxide, oxides of nitrogen
and hydrocarbons.
The Clean Air Act The Clean Air Act requires all vehicle manufacturers to explain in
writing, the operation and maintenance of their emission control

systems.

Maintenance instructions are included on pages 68 — 73 ; the
operation of each system is explained on the following.

Replacement Parts

The emission control systems on your new Honda were designed, built and certified to conform with the Federal regulations
implementing the Clean Air Act. Honda recommends only the use of
new, genuine Honda parts or their equivalent. The use of otherreplacement parts which are not of equivalent quality may impair
the effectiveness of your car's emission control systems.

Crankcase Emission Control System

To prevent crankcase emissions, your car is equipped with a Positive Crankcase Ventilation (PCV) System which routes blowby
gases from the crankcase, through the PCV valve and intakemanifold, into the combustion chamber.ProCarManuals.comMain Menu s t

Evaporative Emission Control System
The Evaporative Emission Control System is designed to prevent
fuel vapors from escaping into the atmosphere. Fuel vapors from the fuel tank are directed into the charcoal
canister where they are adsorbed and stored while the engine is stopped or idling. When the coolant temperature rises to a certain
value, the vapors are drawn into the engine through the throttlebody and the intake manifold during normal engine operation.
Engine Exhaust Emission Controls
The engine exhaust emission control systems are designed to control combustion during idle, acceleration, cruise, and deceleration.
These systems are entirely separate from the crankcase and evaporative emission control systems described previously.
HONDA PGM-FI System
The PGM-FI system consists of three independent sub-systems; Air Intake, Electronic Control and Fuel Control, thus allowing moreaccurate control of air/fuel ratios under all operating conditions.
The Electronic Control Unit (ECU) detects the amount of air
drawn into the cylinders and determines the amount of fuel to be injected to provide the optimum air/fuel ratio for all engine needs.
Ignition Timing Control System
This system automatically controls the ignition timing to reduce
the amount of HC and NOx.
Catalytic Converter
Three Way Catalyst
The catalyst is used to convert hydrocarbons (HC), carbon monoxide (CO) and oxides of nitrogen (NOx) in the exhaust gas,

to carbon dioxide (CO 2
), dinitrogen (N 2
) and water vapor.

Exhaust Gas Recirculation (EGR) (California automatic models except EX Sedan)
The EGR system is designed to control the formation of oxides of nitrogen (NOx) caused when fuel mixture burns at high
temperature. It works by recirculating exhaust gas through the EGR valve and intake manifold into the combustion chambers
where it reduces peak temperature by diluting the air/fuel mixture.ProCarManuals.comMain Menu s t

Catalytic Converter

A catalytic converter is installed in the exhaust system to help
clean-up the harmful exhaust gases that can cause air pollution.
To be effective, the converter must work at high temperature, so don't park your car over dry grass, leaves or anything else that

could burn easily.

To stay effective, the converter must not be contaminated by

leaded gasoline; use only unleaded gas as explained on page 54.

CAUTION:
The converter can be overheated and damaged if it's fed too much
unburned fuel mixture from the engine, so:
— Don't push or tow the car to start it; if the battery is dead, jump start the car as shown on page 110.
— Don't turn the key off while the engine is running above idle
speed.

— Don't change the ignition timing, or remove any emission control
parts.

— Use only the spark plugs specified in this manual. — Don't keep driving your car if it isn't running properly, or if its CHARGE warning light comes on; have it checked by your
Honda dealer.
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