2005 HONDA S2000 check engine

µThe reading on your vehicle’s
temperature gauge should stay in
the midrange under most conditions.
If it reaches the red mark, you
should determine the reason (hot
day, driving up a steep hill, etc.).
If your vehicle overheats, you should
take immediate action. The only
indication may be the temperature
gauge reading reaching the red
mark. Or you may see steam or
spray coming f rom under the hood.
Once your vehicle is running,
disconnect the negative cable f rom
your vehicle, then f rom the
booster battery. Disconnect the
positive cable f rom your vehicle,
then from the booster battery.
Keep the ends of the jumper
cables away from each other and
any metal on the vehicle until
everything is disconnected.
Otherwise, you may cause an
electrical short. Start your vehicle. If the starter
motor still operates slowly, check
that the jumper cables have good
metal-to-metal contact.
Connect the second jumper cable
to the negative ( ) terminal on
the booster battery. Connect the
other end to the grounding strap
as shown. Do not connect this
jumper cable to any other part of
the engine.
If the booster battery is in another
vehicle, have an assistant start
that vehicle and run it at a fast idle. 6.
7.
5. 4.
CONT INUED
Jump Starting, If the Engine Overheats
If the Engine Overheats
T aking Care of t he Unexpect ed
167
Driving with the temperature gauge
reading at the red mark can cause
serious damage to your engine.

Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (seeon page ).
If the temperature gauge stays at
the red mark, turn of f the engine.
If you do not see steam or spray,
leave the engine running, and
watch the temperature gauge. If
the high heat is due to overloading,
the engine should start to cool
down almost immediately. If it
does, wait until the temperature
gauge comes down to the midpoint,
then continue driving. If you see steam and/or spray
coming f rom under the hood, turn
of f the engine. Wait until you see
no more signs of steam or spray,
then open the hood. Saf ely pull to the side of the road.
Put the transmission in Neutral,
and set the parking brake. Turn
of f the all accessories, and turn on
the hazard warning indicators. If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank. Add coolant
if the level is below the MIN mark
(seeon
page ).
2. 1.
3. 4.
5.
6.
179
134 Emergency
Towing
A dding Engine Coolant
If theEngineOverheats
168
Steam and spray from an
overheated engine can
seriously scald you.
Do not open the hood if steam
is coming out.

If there was no coolant in the
reserve tank, you may need to add
coolant to the radiator. Let the
engine cool down until the reading
reaches the middle of the
temperature gauge, or lower,
bef ore checking the radiator.Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. Af ter the
pressure releases, push down on
the cap, and turn it until it comes
off.Put the radiator cap back on
tightly. Run the engine, and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair (see
on page ).
If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly.
Start the engine, and set the
temperature control dial to
maximum heat. Add coolant to the
radiator up to the base of the f iller
neck. If you do not have the
proper coolant mixture available,
you can add plain water.
Remember to have the cooling
system drained and ref illed with
the proper mixture as soon as you
can.
9. 8.
7. 10.
11.179
Emergency
Towing
If theEngineOverheats
T aking Care of t he Unexpect ed
169
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.

Saf ely pull of f the road, and shut
of f the engine. Turn on the hazard
warning indicators.
Let the vehicle sit f or a minute.
Open the hood, and check the oil
level (see page ). An engine
very low on oil can lose pressure
during cornering and other driving
maneuvers.
If necessary, add oil to bring the
level back to the full mark on the
dipstick (see page ).
Start the engine, and watch the oil
pressure indicator. If it does not go
out within 10 seconds, turn of f the
engine. There is a mechanical
problem that needs to be repaired
bef ore you can continue driving
(seeon page
). If the charging system
indicator comes on brightly
when the engine is running, the
battery is not being charged.
Immediately turn of f all electrical
accessories. Try not to use other
electrically operated controls such as
the power windows. Keep the engine
running; starting the engine will
discharge the battery rapidly.
Go to a service station or garage
where you can get technical
assistance.
This indicator should never
come on when the engine is
running. If it starts f lashing or stays
on, the oil pressure has dropped very
low or lost pressure. Serious engine
damage is possible and you should
take immediate action. 1.
2.
3.
4.103
131
179
L ow Oil Pressure Indicator, Charging System Indicator
L ow Oil Pressure Indicator
Emergency T owingCharging System Indicator
170
Running the engine with low oil
pressure can cause serious mechanical
damage almost immediately. Turn of f
the engine as soon as you can saf ely get
the vehicle stopped.

If your vehicle battery has been
disconnected or gone dead, these
codes are erased. It takes at least
three days of driving under various
conditions to set the codes again.
If the indicator comes on repeatedly,
even though it may go of f as you
continue driving, have your vehicle
checked by a dealer as soon as
possible.
If this indicator comes on
while driving, it means one
of the engine’s emissions control
systems may have a problem. Even
though you may f eel no dif f erence in
your vehicle’s perf ormance, it can
reduce your f uel economy and cause
increased emissions. Continued
operation may cause serious damage.
If you have recently ref ueled your
vehicle, the indicator coming on
could be due to a loose or missing
f uel f ill cap. Tighten the cap until it
clicks at least three times.
Tightening the cap will not turn the
indicator of f immediately; it takes at
least three days of normal driving. Your vehicle has certain ‘‘readiness
codes’’ that are part of the on-board
diagnostics f or the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not
set, the test cannot be completed.To check if they are set, turn the
ignition to ON (II), without starting
the engine. The malf unction
indicator lamp will come on f or 20
seconds.If itthengoesoff,the
readiness codes are set. If it blinks
f ive times, the readiness codes are
not set. If possible, do not take your
vehicle f or a state emissions test
until the readiness codes are set.
Refer to
f or more inf ormation (see page ).
192
Malf unction Indicator L amp
Readiness Code
State Emissions T estingT aking Care of t he Unexpect ed
171
If you keep driving with the
Malf unction Indicator Lamp on, you
can damage your vehicle’s emissions
controls and the engine. Those repairs
may not be covered by your vehicle’s
warranties.

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#
) This manual covers maintenance and recommended
procedures f or repair to engine and chassis components.
It is written f or the journeyman mechanic, but is simple
enough f or most mechanically-inclined owners to under-
stand.
This manual complements the service manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
This manual describes the procedures involved in the
replacement of damaged body parts.
Authorized Manuals
Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
198
NOTE: Dealers and Companies please provide dealer or company name,
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below for a quotation.
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days of delivery. On returns, a restocking fee may be applied against the original order.

CONT INUED
....................................
Accessories .105
ACCESSORY (Ignition Key .......................................
Position) .53
...............
Accessory Power Socket . 69
....................
Additives, Engine Oil . 132
...............................
Airbag (SRS) .9, 19
................
Air Conditioning System . 74
............................................
Usage .76
.......................
Air Pressure, Tires .150
.......................
Alcohol in Gasoline .100
......................................
Antif reeze .134
Anti-lock Brakes (ABS) ...............................
Indicator .41, 119
...................................
Operation .118
.
Anti-thef t Steering Column Lock . 53
............................
Anti-thef t System .94
......................................
Audio Panel .70
..................................
Audio System .78
...
Automatic Seat Belt Tensioners . 17
...............
Automatic Speed Control . 95
........
Back-up Light Replacement . 144Battery
Charging System ...........................
Indicator .40, 170
............................
Jump Starting .166
..............................
Maintenance .154
............................
Specif ications .185
................................
Bef ore Driving .99
....................................
Belts,Seat .8,16
.............................
Beverage Holder .69
..................................
Booster Seats .32
............................................
Brakes .117
...........
Anti-lock System (ABS) . 118
.............
Break-in, New Linings . 100
...........................................
Fluid .139
.........................................
Parking .67
..........................
System Design .118
.................
System Indicator . 40,172
........................
Wear Indicators .118
.............................
Braking System .117
.................
Break-in, New Vehicle . 100
..
Brightness Control, Instruments . 49
........................
Brights, Headlights .48
.........................
Bulb Replacement .140
..........................
Back-up Lights .144
.................................
Headlights .140
...........
Side Turn Signal Lights . 143............................
Specif ications .185
............
Turn Signal Lights . 142,144
..............................
Bulbs, Halogen .140
............................
Capacities Chart .184
.............
Carbon Monoxide Hazard . 35
....................
Cargo, How to Carry .107
..............
CAUTION, Explanation of . ii
...........................................
CD Care .90
.....................................
CD Changer .90
.......
CD Changer Error Messages . 92
........................
CD Error Messages .91
.........................................
CD Player .88
........................
Certif ication Label .182
.................................
Chains, Tires .153
....................
Changing a Flat Tire .159
Changing Oil ........................................
How to .132
......................................
When to .125
...
Charging System Indicator . 40,170
............
Checklist, Bef ore Driving . 113
Index
B A
C
INDEX
I

Î
................
DANGER, Explanation of . ii
...................................
Dashboard .3, 38
................
Daytime Running Lights . 48
Daytime Running Lights .......................................
Indicator .42
.................................
Dead Battery .166
............
Defects, Reporting Safety . 196
................
Def ogger, Rear Window . 50
................
Defrosting the Windows . 77
..........................
Dif f erential Fluid .138
....................................
Dimensions .184
...............
Dimming the Headlights . 48
Dipstick ..................................
Engine Oil .103
..........................
Directional Signals .48
........
Disc Brake Wear Indicators . 118
.....................
Disposal of Used Oil .134 ...................
Do Not Tow a Trailer . 119
Doors ..............
Locking and Unlocking . 54
.......................
Monitor Indicator .41
......................
Power Door Locks .54
..........
DOT Tire Quality Grading . 186
Downshif ting, Manual .............................
Transmission .115
...........
Driver and Passenger Safety . 5
...........................................
Driving .111
....................................
Economy .104
........................
Driving Guidelines .112
..............................
Economy, Fuel .104
..................................
Emergencies .157
.............
Battery, Jump Starting . 166
...........
Brake System Indicator . 172
................
Changing a Flat Tire . 159
.....
Charging System Indicator . 170
..................
Checking the Fuses . 174
...
Closing the Convertible Top . 173
.........
Hazard Warning Flashers . 49
............................
Jump Starting .166
.....
Low Oil Pressure Indicator . 170
.....................................
Child Saf ety .23
..............................
Booster Seats .32
...................................
Child Seats .28
.....
Important Saf ety Reminders . 26
..........................
Larger Children .31
.......................
Risk with Airbags .24
.............................
Small Children .27
.......................................
Child Seats .28
.......................
Cleaning Seat Belts .145
.................................................
Clock .45
...................................
Clutch Fluid .139
........................
CO in the Exhaust .189
............
Cold Weather, Starting in . 114
......................
Compact Spare Tire .158
...............
Consumer Inf ormation . 194
.............
Controls, Instruments and . 37
..............................
Convertible Top .61
...............
Convertible Top Cover . 63
..
Lowering the Convertible Top . 61
................................
Maintenance .65
.....
Raising the Convertible Top . 64
Coolant ........................................
Adding .134
....................................
Checking .104
.........................
Proper Solution .134
...................
Temperature Gauge . 45Crankcase Emission Control
........................................
System .189
................
Cruise Control Indicator . 41
..............
Cruise Control Operation . 95
......................................
Cup Holder .69
.............
Customer Service Of f ice . 194
Index
D
E
II