1990 HONDA PRELUDE ignition

Ignition Switch
The combined ignition switch/anti-theft lock is located on the right side of the steering column and has four positions:
0-LOCK position: The key can be removed or inserted in thisposition. To remove the key, push it in at position I, then turn it to
0 and pull it out. When the key is removed, the steering column

will lock.

NOTE:

On cars equipped with automatic transmissions, the transmission
must be in Park before pushing and turning the key to the O-LOCK position.
Never turn the ignition switch to the lock position or remove the
key while the car is in motion; the steering wheel can lock causing
a loss of directional control, and an accident could result. I-ACCESSORY position: In this position, the accessory circuit is

on, but the ignition circuit is off.
If the key is difficult to turn from the 0 to the I position, turn the

steering wheel slightly to relieve pressure on the lock.
II-ON position: This Is the normal running position.
III-START position: The starter will engage when the key is
turned to this position.
To remind you to remove the ignition key when leaving your car, a beeper will sound if the key is still in the ignition when you open the
driver's door. The beeper system is deactivated when you turn the ignition to 0 (Lock) and fully remove the key.ProCarManuals.comMain Menu t s

Shifting the Automatic
The automatic transmission shift lever has a locking mechanism to prevent accidental shifting into Reverse (R), Park (P) or 2nd (2). Also,
the Automatic Shift Lock prevents you from shifting out of Park unless the brake pedal is already depressed and the ignition switch isin the II position.
Push the button on the shift handle to shift into 2nd, Reverse or
Park; depress the brake pedal and then push the button on the shifthandle to shift out of Park.
: Depress the brake pedal first and push the button, then shift.
: Push the button, then shift.
: Shift as desired.
If you cannot shift out of Park with
the brake pedal depressed and the ignition switch in the II position:

1. Turn the ignition switch off and
remove the key.
2. Insert the key in the Shift Lock Release located to the right of the

shift lever.

3. Press and hold the key down, then press the button on the shifthandle and move the shift lever to

Neutral.

4. Return the key to the ignition switch, depress the brake pedal
and restart the engine. Depress
buttonNOTE:
If you
encounter any problem shifting out of Park, have your
authorized Honda dealer check the system as soon as possible. KEY
Insert

SHIFT LOCK RELEASE

(cont'd)ProCarManuals.comMain Menu t s

Fuse Replacement
The fuse boxes are located under the dashboard on the driver's side and on the right front fender beside the battery. The circuitsprotected by each fuse are listed on the plastic sheet in the box.
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 win be
burned through.
Checking the fuses: 1 . Turn off the ignition and all other switches.
2 . If you find a blown or possibly faulty fuse, use the fuse remover (located inside the fuse box under the dashboard) to pull the
blown fuse out of its clips.
3 . Check all other fuses as well as the one you suspect.
4 . Push in a new fuse of the same rating, and make sure it fits tightly in the clips. If it fits loosely, have your dealer fix it.If you don't have a spare, take a fuse of the same rating (or lower)
out of a circuit you may not need, like the radio or cigarette lighter. Remember to replace the borrowed fuse and the missing spares. FUSE BOX COVER
Blown
FUSE
REMOVER

(cont'd)ProCarManuals.comMain Menu t s

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 safety
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 page 86 — 87)

and tow with the transmission in neutral (N) and the ignition key in
the I position.

CAUTION:

To avoid serious damage on automatic transmission cars, first start the engine and shift to D, 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 flatbed 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.
When towing a car with 4WS even with the front wheels off the ground, turn the wheels straight ahead and tie the steering wheel in place. TowingProCarManuals.comMain Menu s t

Emission Controls (cont'd)
Intake Air Temperature Control System (2.0 S)The air control valve mounted inside the air cleaner snorkel
automatically opens and closes according to the intake air
temperature. The carburetor then receives air of constant
temperature which results in lower exhaust emissions.
Carburetor Controls (2.0 S)—Throttle controller — This system controls the throttle during
gear shifting, reducing the amount of HC caused by unburned

fuel mixture.

— Choke opener — When starting a cold engine, this device
opens the choke slightly. This reduces the amount of HC and

CO.

— Altitude Compensation devices — The Air Jet Controller (AJC)
has an atmospheric pressure sensing bellows. The AJC is
designed to control the amount of additional air fed to the
carburetor jets to maintain good driveability at any altitude. Ignition Timing Control System
This system automatically controls the ignition timing to reduce

the amount of HC and NOx.

Exhaust Gas Recirculation (EGR) [Except California 2.0 S models]
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.
Catalytic Converter
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.
ProCarManuals.comMain Menu t s

Catalytic Converter
A catalytic converter is installed in the exhaust system to help
clean-up the 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 55.

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 119.
— 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 Check Engine warning light comes on; have It checked byyour Honda dealer. CATALYTIC CONVERTERProCarManuals.comMain Menu t s

Index (cont'd)

Emission Controls.........................130

Engine
Coolant.......................................88
Coolant Temperature
Gauge....................................20
Identification Number .............127
Oil and Filter...............................83
Oil Pressure
Warning

Light .......................................22

Specification ...........................125

Exhaust Controls....................131
Engine Exhaust Ga
s Warning

....................................................64

Evaporative Emission Control
System ....................................131
Exhaust Gas Recirculation...........132
Exterior Care.................................110
Filters

Air...........................................94
Engine Oil ...................................84

Fuel.............................................96

Fluid .....................................See "Oil"

Foreign Countries, Operation in ...............................56
Four Wheel Steering.......................59 Front Seat
Adjustment..................................5

Fuel

Filter Door and Cap...................56
Fuel Reserve
Warning

Light .......................................22

Gauge.........................................20

Gasohol......................................55

Gasoline ......................................55

Requirement..............................55

Filter...........................................96
Fuse

Checking and Replacing .........101

Specification...........................126 Gasoline............................See"Fuel"
Gas Station Information
...........................................back cover

Gauges............................................20
Glove Box ........................................39
Hazard Warning

Indicator Light ...........................21
Hazard Warning System................33

Headlights

Flasher.......................................31
Headlight Motor
Switch ...........32

High Beam Indicator..................21
High Beam/Low

Beam

Switch...................................31
If the

Retractable Headlights
do not operate ...................123

Reminder Chime

.......................30

Retractable Headlight Motor Warning Light .......................25

Switch.......................................30
Headlight High
Beam Indicator

Light ...........................................21

Head Restraints.................................8

Heating.............................................45

High Bea
m

Switch .......................................31
Indicator Light ...........................21

Hood Latch.....................................39
Identification Numbers.................127
Ignition
Keys.............................................3

Switch........................................58

Indicator Lights ...............................20
Inflation Pressures, Tire..............105
Instrument Panel....................19
Instrument Panel
Brightness

Control.......................................33

Interior light .....................................33
Interior Trim Care .........................110 Jack .............................................116
Jump Starting ...............................119ProCarManuals.comMain Menu t s

Keys
Door Locks ..................................3
Glove box ..................................39
Trunk Lid Lock ............................4
Ignition ........................................58

Key Reminder Beeper...............58Keys.............................................3
Lap/Shoulder Belts
................................Se
e "Seat Belts"

Light

Bulb Replacement...................103
Fuse Replacement ..................101
Light Reminder
Chime ..............30

Operation.................................30

Warning and Indicator Light
......................................................21
Locks

Fuel Filler Door ..........................56
Doors..........................................3

Glove Bo
x ..................................39

Trunk Lid......................................4

Anti-theft Steering

Column

Lock.......................................58

Lumbar Support,Driver's .................7
Maintenace Schedule
and

Records......................................76

Manual Transmission Maximum Allowable Speeds
....................................................66

Oil........................................86
Recommended Shift
Speeds

....................................................66

Shifting.....................................65

Meters Gauges.......See
"Gauges"
Mirrors Power Mirrors ...........................29
Rear View Mirrors ....................29 Numbers, Identification................ 127

Octane Rating,
Gasoline

.......................................... See "Fuel"
Odometer ........................................20Oil

Engine Oil ...................................83

Fluid Locations ..........................82Transmission Oil/Fluid ..............86Oil Pressure Warning Light.......22
Power Steering Fluid ................97
Operation In
Foreign Countries

..........................................................56

Panel Brightness Control ...............33
Parking Brake.................................
39

Power

Mirrors .......................................29
Steering .....................................
97

Windows................................40

PGM-FI System............................131
Pressures, Tire Inflation...............105
Preventive Service.......................

112
(cont'd)
Radiator Coolant .............................88

Radio ................................................47

Rear View Mirrors ..........................29
Rear Window Defogger ..................28
Reminder Lights
..........................See "Warning lights"ProCarManuals.comMain Menu t s