1990 HONDA PRELUDE light

Jump Starting (cont'd)
3. Use the other cable to connect the negative terminal of the booster battery to the engine at the ground cable as shown.
4.To remove the cables, reverse the above procedures exactly.
DO NOT push or tow a car to start it. The forward surge when the
engine starts could cause a collision. Also, under some conditions,
the catalytic converter could be damaged. A car equipped with an
automatic transmission cannot be started by pushing or towing.
NOTE:
After jump-starting the car, there is a possibility that the ALB
warning light may come on due to insufficient battery voltage. After
the battery is sufficiently recharged and the engine is turned off and restarted, the ALB warning light should indicate that the ALB
system is OK, by coming on for a few seconds each time the engine is started. If the light remains on after recharging, have it checked

by a Honda dealer.ProCarManuals.comMain Menu t s

Headlight Motors
Proceed as follows if either headlight motor fails to operate:
1. Lift the hood and remove the cover from the engine compartment fuse box.

FUSE BOX

RIGHT
HEADLIGHT,
MOTOR
LEFT

HEADLIGHT
MOTOR
RIGHT HEADLIGHT LEFT HEADLIGHT
2. Use the label on the fuse box cover to locate the fuse for the headlight motor that doesn't work. Remove the fuse with the
fuse remover located in the fuse box under the dashboard.

FUSE

REMOVER FUSE

BOX

COVERProCarManuals.comMain Menu s t

Headlight Motors (cont'd)
3. If the fuse has blown, replacing it with a new fuse of the same
amperage should allow the
motor to work.

However, if the fuse hasn't
blown, or if a new fuse did not
solve the problem, remove the
fuse and operate the headlight motor manually.

CAUTION:

Always remove the fuse before manually operating a headlight
motor, otherwise the motor may suddenly activate.
4. Remove the cap from the top of the headlight motor, then turn the knob in the direction of the arrow (clockwise) until theheadlight is as far up or down as it will go.

NOTE:
If foreign matter is the cause of the motor malfunction, it can
usually be dislodged by turning the knob counterclockwise,

5. Replace the cap properly.

6. Reinstall the fuse and fuse box cover and have the headlight motor inspected at the earliest opportunity. BLOWN FUSE

CAP
Turn knob indirection of arroProCarManuals.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 and
hydrocarbons 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 76—81 ; 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 other
replacement 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 intake manifold, into the combustion chamber.ProCarManuals.comMain Menu t s

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)
Air Conditioner

Operation.....................................
43

Service.......................................108

Air Filte
r ...........................................95
Air Pressure, Tires........................105
Aluminum Alloy Wheels...............111
Antifreeze ..................See
"Radiator coolant"
Anti Lock Brakes(ALB) ..................18 ALB Warning Light .....................
24

ALB Fluid
.....................................
99
Anti-theft Steering

Column Lock

System.........................................58

Appearance Care .........................
110

Ashtrays..........................................38
Audio System
.................................
47
Automatic Transmission

Driving Technique ......................68

Fluid.............................................87
Operation....................................67

Shift Lever

Position
Indicator .................................
21 Battery
Charging System Warning

Light.......................................23

Jump Starting ...........................119 Maintenance .............................100

Specification ........................... 126

Beeper System Fasten Seat Belt Beeper ............13
Key Reminder .............................58

Light Reminder Chime ................30

Belts,Seat...............See "Seat Belts"
Brake Lamp Warning Light.............25
Brakes Brake Failure Warning Light .......................................23
Brake Fluid...................................99
Brake System Design .................98
Brake Wear .................................98
Brake Wear Indicators................98

Parking Brake ..............................39

Parking Brake Warning Light .......................................23
Break-in Period ..................................2

Bulb

Replacement.............................103
Specification .............................126
Buzzer ............See "Beeper System"
Capacities......................................125

Care and Cleaning.........................110

Catalytic Converter .....................134
Certification Label ........................127

Chains,Tires ................................. 106

Child Restraint System ..................14
Cigarette Lighter .............................38

Clock................................................37

COMPACT Spare Tire .................114Coolant Temperature Gauge .........20
Cooling(with A/C) ...........................44 Cooling System ...............................88
Crankcase Emission ControlSystem ..........................................
130
Cruise Control
Opeartion...................................
35Indicator .....................................22
Defogger.........................................28
Defroster .........................................45

Dimmer Switch, Headlights...........31
Doors
Locks............................................3

Warning Light ............................25
Emergency
Changing Flat Tire ...................116

Hazard Warning System ..........33If the Retractable Headlights do not operate ...................123

If the Sunroof Won't
Close .....................................54
If Your Car Gets Stuck ...........122
Jump Starting .........................119Towing.....................................121Warning and
Indicator

Lights....................................21
ProCarManuals.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