1998 HONDA PRELUDE ECU

Preparing to Drive

You should do the following checks and adjustments every day before
you drive your vehicle.
1. Make sure all windows, mirrors, and outside lights are clean and
unobstructed. Remove frost, snow, or ice.
2. Check that the hood and trunk are fully closed.
3. Visually check the tires. If a tire looks low, use a gauge to check its
pressure.
4. Check that any items you may be carrying with you inside are stored
properly or fastened down securely. 5. Check the adjustment of the seat
(see page 75).
6. Check the adjustment of the inside and outside mirrors (see
page 83).
7. Check the adjustment of the steering wheel (see page 64).
8. Make sure the doors are securely closed and locked.
9. Fasten your seat belt. Check that your passengers have fastenedtheir seat belts (see page 14). 10. Turn the ignition switch ON (II).
Check the indicator lights in the
instrument panel.
11. Start the engine (see page 133).
12. Check the gauges and indicator lights in the instrument panel (see
page 51).

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Towing a Trailer

Mirrors
Many states and provinces have laws
requiring special outside mirrors
when you are towing a trailer. Check
the laws in your area. You may want
to install mirrors, even if they are not required. Hook up the trailer and see
how much it obscures your ability to see behind you with the standard
mirrors. If you cannot see directly
behind you, or have a large blind spot next to the trailer or the vehicle,
you should install mirrors intended for towing. Connecting the Trailer
Most trailers that have a gross
weight of 1,000 Ibs (450 kg) do not have their own braking system. If
you are thinking of getting a trailer that does have brakes, make surethey are electrically-operated. There
are no provisions in your vehicle to
tap into its hydraulic braking system.
Any attempt to attach the trailer's brakes to your vehicle's hydraulicsystem, no matter how successful it
may seem, will lower braking effectiveness and create a potential

hazard.
Always use a safety chain when
towing a trailer. Connect the safetychain securely at both ends. Makesure the chain crosses under the
tongue so it will catch the trailer if it
becomes unhitched. Leave enough slack in the chain so it can't bind in a
sharp turn. Do not let it drag on the

ground.

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Towing a Trailer

Your vehicle has a trailer lighting connector in the trunk by the left tail-
light. To use the connector, undo the
fastener on the left side of the trunk

lining. Refer to the drawing above

for the wiring color code and pur-
pose of each connector pin.
Since the lighting and wiring can be
different for various brands of
trailers, have a technician who is
familiar with your trailer modify its
lighting plug. A converter may be required between the vehicle and
trailer for the lights to work correctly. Before Starting Out
As you are preparing to tow your trailer, do the following: Measure the trailer's tongue load.
You can do this with a bathroom
scale.
Verify that the hitch and safety
chain are securely fastened. Check the condition and air
pressure of all tires on the trailer
and your vehicle. Low tire
pressure can seriously affect the
handling. Also check the spare tire. With everything loaded and the
trailer connected, check that therear of the vehicle is not sagging.
If so, redistribute the load in the
vehicle. Check that all lights on the vehicle
and trailer are working properly.

Driving

GROUND

(BLACK)
BACK-UP LIGHT

(GREEN/BLACK)

RIGHT TURN SIGNAL

(GREEN/YELLOW)
LEFT TURN SIGNAL

(GREEN/BLUE)

BRAKE LIGHT

(WHITE/BLACK) TAILLIGHT

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Engine Oil
Adding Oil
To add oil, unscrew and remove the engine oil fill cap on top of the valve
cover. Pour in the oil, and replace the engine oil fill cap. Tighten it securely.
Wait a few minutes and recheck the oil level. Do not fill above the upper
mark; you could damage the engine. Recommended Oil
Oil is a major contributor to your
engine's performance and longevity.
Always use a premium-grade deter- gent oil.
You can determine an oil's SAE
viscosity and Service Classification from the API Service label on the oilcontainer.
A fuel-efficient oil is recommended for your Honda. This is shown on the
API Service label by the words "Energy Conserving". This oil is
formulated to help your engine use less fuel. The API Service label also tells you
the service classification of the oil.
Always use an oil that is labeled "API Service SJ". This service rating may
include other classifications, such asCD. These additional classifications
are not a problem, as long as the
label also carries the SJ classification.

CONTINUED

Maintenance

ENGINE OIL FILL CAP
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Cooling System

Except Type SH only

Remove the drain bolt and washer
from the engine block. 4. Remove the reserve tank from its
holder by pulling it straight up.Drain the coolant, then put the
tank back in its holder.
5. When the coolant stops draining, tighten the drain plug in the
bottom of the radiator.
Except Type SH only

Apply non-hardening sealant to the drain bolt threads, put a new washer
on the drain bolt, and reinstall the
bolt in the engine block. Tighten it

securely.

Tightening torque:
61 Ibf .
ft (83 N .
m , 8.5 kgf .
m)

6. Mix the recommended antifreeze
with an equal amount of purified
or distilled water in a clean
container. The cooling system
capacity is:

With 5-speed manual transmission:

(Except Type SH)
0.87 US gal (3.3 l , 0.73 Imp gal)
(TypeSH)
0.85 US gal (3.2 l ,0.70 Imp gal)

With automatic transmission:

0.85 US gal (3.2 l , 0.70 Imp gal)

Maintenance
DRAIN BOLT

Except

Type SH
DRAIN PLUG

HOLDERRESERVE

TANK CAP
RESERVE TANK
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Transmission Fluid

Automatic Transmission
Check the fluid level with the engine
at normal operating temperature.
1. Park the vehicle on level ground. Shut off the engine.
2. Remove the dipstick (yellow loop) from the transmission and wipe it
with a clean cloth. 3. Insert the dipstick all the way into
the transmission securely as
shown in the illustration.
4. Remove the dipstick and check the fluid level. It should bebetween the upper and lowermarks. 5. If the level is below the lower
mark, add fluid into the filler hole
to bring it to the upper mark.
Always use Honda Premium Formula Automatic Transmission
Fluid (ATF). If it is not available,
you may use a DEXRON ®
III
automatic transmission fluid as a
temporary replacement. However,
continued use can affect shift quality. Have the transmission
drained and refilled with Honda
ATF as soon as it is convenient.
6. Insert the dipstick all the way back into the transmission securely as
shown in the illustration.
The transmission should be drained and refilled with new fluid according
to the time and distance recommen-
dations in the maintenance schedule.
Maintenance

DIPSTICK

UPPER MARK
LOWER MARK

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Transmission Fluid

5-speed Manual Transmission Check the fluid level with the
transmission at normal operating temperature and the vehicle sittingon level ground. Remove the
transmission filler bolt and carefully
feel inside the bolt hole with your
finger. The fluid level should be up
to the edge of the bolt hole. If it is
not, add Genuine Honda Manual
Transmission Fluid (MTF) until it starts to run out of the hole. Reinstall
the filler bolt and tighten it securely. If Honda MTF is not available, you
may use an API service SG, SH or SJ
grade motor oil with a viscosity of SAE 10W-30 or 10W-40 as a
temporary replacement. An SG
grade is preferred, but an SH or SJ
grade may be used if SG is not available. However, motor oil does
not contain the proper additives and
continued use can cause stiffershifting. Replace as soon as
convenient.
The transmission should be drained and refilled with new fluid according
to the time and distance recommen- dations in the maintenance schedule.

Maintenance

Correct
level
FILLER

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Lights

Replacing a Rear License Bulb
1. Use a Phillips-head screwdriver to remove the two screws holding
the license plate light assembly to
the bracket. Pull the assembly away from the bracket. 2. Remove the socket from the light
assembly by turning it one-quarter
turn counterclockwise.
3. Pull the bulb straight out of its socket. Push the new bulb in until
it bottoms in the socket.
4. Turn on the parking lights and
check that the new bulb is

working.

5. Put the license light assembly in place. Reinstall the two screws and
tighten them securely.
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