1991 HONDA CIVIC ECU

Hood

To open, pull back on the handle

under the left side of the dash.
The hood latch is spring-loaded, so the hood will pop up slightly.Release the safety catch under the front center of the hood by
pushing the rubber-tipped handle up.

Lift the hood and prop it open with the support rod.
To close, take the support rod down, and return it to its clip , then
lower the hood until it is approximately one foot from the closed position, then let it drop. Be sure the hood is securely latched before
driving away.
Pull to release
SUPPORT ROD
Push upProCarManuals.comMain Menu s t

Safety Items

Before driving away, check that: The doors are closed properly.
The mirrors are properly adjusted, and the windows clean.
The driver and passengers are wearing properly adjusted seat

belts.
The head restraints are properly adjusted.
The warning and indicator lights are operating properly. The brake pedal feels normal.

All luggage and cargo is secured.
Nothing is interfering with the driver's feet or blocking vision to

the rear.

While driving remember to: Always drive defensively; expect the unexpected.Reduce your speed during night hours and bad weather.Follow at a safe distance; don't tailgate. Get off the highway when you are tired; stop and take a rest.
When stopping for repairs: Park the car well off the road.
Turn on the hazard warning flasher. Use flares or other warning devices to warn other motorists.
After parking your car: Apply the parking brake and shift to first gear if equipped with
manual transmission, or PARK on automatic transmission equip-ped cars.
Make sure the sunroof and windows are closed and the doors are
locked.
If parked on a hill:

1. Turn the front wheels away from the curb if facing uphill.
2. Turn the front wheels toward the curb if facing downhill.
Never leave children unattended in a parked car. Take your keys.ProCarManuals.comMain Menu s t

Engine Oil and Filter (cont'd)
Fuel Efficient Oil For the best fuel economy from your car, it is recommended that
you use a fuel efficient SG grade oil. This oil is usually identified by
the words such as: "Energy Conserving II," "Gas Saving," and "Fuel Saving," etc.
Changing Oil and Filter
Engine oil and filter should be changed together every 6 months or
7,500 miles (12,000 km), whichever comes first. The filter is located
on the engine block, below the intake manifold. A special "cap
type" oil filter wrench is required (available from your Honda dealer). Use only a genuine Honda filter or its equivalent.

CAUTION:

The oil filter cannot easily be removed from above the engine. For
this reason it is recommended that the oil filter change be done by a skilled mechanic.
1. Start the car to warm up the engine, then shut it off.
2. Remove the engine oil filler cap and drain bolt, and drain the oil.
A warmed-up engine and the oil in
it are hot; be careful not to burn yourself.
3. Remove the oil filter and let the remaining oil drain out.
4. Install a new filter according to
the instructions on or with the

filter.

5. Reinstall the drain bolt with a new washer and tighten it securely.Refill the engine with the recom-
mended oil, to the upper mark on

the dipstick.

ENGINE OIL CAPACITY (including filter):
3.5
(3.7 US qt, 3.1 Imp qt)

OIL FILTER

ENGINE OIL
DRAIN BOLTProCarManuals.comMain Menu s t

6. Reinstall the filler cap securely.
7. Start the engine and make sure oil is not leaking from the drain
bolt or the filter.

8. Shut off the engine and recheck the oil level.
NOTE:Please dispose of used motor oil in a manner that is compatible with
the environment. We suggest you take it in a sealed container to

your local service station for reclamation. Do not throw it in the

trash or pour it on the ground.

CAUTION:

Used motor oil may cause skin cancer if repeatedly left in contact
with the skin for prolonged periods. Although this is unlikely
unless you handle used oil on a daily basis, it is still advisable to
thoroughly wash your hands with soap and water as soon as possible after handling used oil.ProCarManuals.comMain Menu s t

Transmission Oil/Fluid Check
Transmission oil/fluid must be checked with the engine off and the
car on level ground.
If the engine has been running, some engine components may be
hot enough to burn you.

CAUTION:

If the oil/fluid level is low, check for possible leaks before adding
oil. Do not overfill.
Since the transmission and differential are in the same housing, you
are actually checking both oil/fluid levels in one procedure. Change
transmission oil/fluid according to the Maintenance Schedule on
page 70.

Manual
Remove the oil filler bolt (beside the right axle). Feel inside the bolt
hole with your finger. If the oil is up to the bottom edge of the hole,
the oil level is correct. If it is not, slowly add oil until it runs out of
the hole, then reinstall the bolt and tighten it securely with a wrench.
MANUAL TRANSMISSION OIL CHANGE CAPACITY: 1.8 (1.9 US qt, 1.6 Imp qt)
Use only SF or SG grade motor oil when adding or changing transmis-
sion oil. OIL CHECK/
FILLER BOLT
CORRECT LEVELProCarManuals.comMain Menu s t

Use the proper viscosity oil

for the climate in which
you drive:

Ambient Temperature

Automatic
The automatic transmission fluid level is checked (with the engine off and the car on level ground) using the dipstick on the passenger
side of the transmission housing. Remove the dipstick and wipe it

DIPSTICK
UPPER

LOWER

Insert the dipstick and remove it. The fluid level should be between
the upper and lower marks. If necessary, add fluid and recheck. Use only DEXRON
Automatic Transmission Fluid (A.T.F.) when adding or changing fluid.
After checking the fluid level, push the dipstick in securely
AUTOMATIC TRANSMISSION FLUID CHANGE CAPACITY: 2.4 (2.5
US qt, 2.1 Imp qt)ProCarManuals.comMain Menu s t

RESERVE TANKIf the level is below the MAX
mark, but still visible, add a 50/50
solution of antifreeze and water
to bring it up to MAX. If there is no coolant in the re-
serve tank, the cooling system should be checked for leaks and
repaired if necessary. Coolant

must then be added to the radi-

ator.

CAUTION:

Radiator coolant will damage paint. Quickly rinse any spilled
coolant from painted surfaces.
Wait until the engine is cool, then turn the radiator cap counterclock- wise until it stops. DO NOT PRESS DOWN WHILE TURNING THECAP. After any remaining pressure has been relieved, remove the
cap by pressing down and again turning it counterclockwise. Add
enough coolant to fill the radiator, and reinstall the cap. Be sure to
tighten it securely. Fill the reserve tank up to the MAX mark with
the engine cold.

Maintenance
1. Check the freeze protection level of the coolant with a hydrome- ter.
2. Keep the front of the radiator free of dirt and debris.
3. Check hoses and hose clamps regularly.
Replacing Coolant Replace coolant at 36 months or 45,000 miles (72,000 km), which-
ever comes first. Thereafter, replace every 2 years or 30,000 miles (48,000 km), whichever comes first.

(cont'd)

MAX
MIN

RADIATOR COOLANT

REFILL CAPACITY:
(excluding reserve tank) 0.4 (0.11 US gal, 0.09 Imp gal)
Manual transmission 4.0 (1.06 US gal ,0.88 Imp gal)

4.1 (1.08 US gal,0.90 Imp gal)*

Automatic transmission 4.0 (1.06 US gal,0.88 Imp gal)*
4.5 (1.19 US gal,0.99 Imp gal)

* : DX Hatchback and DX/LX Sedan
ProCarManuals.comMain Menu s t

Air and Fuel Filters
Air Filter Replace the air filter every 24 months or 30,000 miles (48,000 km),
whichever comes first (more often in extremely dusty conditions).

Replacement
Remove the four screws holding the air filter cover halves together.
Remove the top half of the air fitter cover. Replace the filter. Reinstall the cover and screws securely.
SCREWS
FILTER

Fuel Filters

The fuel filter is located in the engine compartment, on the right center of the lower dashboard. It should be replaced at 60,000 miles (96,000 km) or 48 months whichever comes first, or any time you
suspect contaminated gas may have clogged it.

CAUTION:

Because the fuel system is under pressure, the filter should be

replaced only by a qualified Honda technician.ProCarManuals.comMain Menu s t