2004 FORD MUSTANG service indicator

Service engine soon:
TheService engine
soonindicator light
illuminates when the
ignition is first turned to the ON position to check
the bulb. Solid illumination after the engine is
started indicates the On Board Diagnostics System
(OBD-II) has detected a malfunction. Refer toOn
board diagnostics (OBD-II)in theMaintenance
and Specificationschapter. If the light is blinking,
engine misfire is occurring which could damage your
catalytic converter. Drive in a moderate fashion
(avoid heavy acceleration and deceleration) and
have your vehicle serviced immediately.
Under engine misfire conditions, excessive
exhaust temperatures could damage the
catalytic converter, the fuel system, interior floor
coverings or other vehicle components, possibly
causing a fire.
Check fuel cap:
Illuminates when the
fuel cap may not be
properly installed.
Continued driving with this light on may cause the
Service engine soon light to come on. Refer toFuel
filler capin theMaintenance and Specifications
chapter.
Brake system
warning light:To
confirm the brake
system warning light is
functional, it will momentarily illuminate when the
ignition is turned to the ON position when the
engine is not running, or in a position between ON
and START, or by applying the parking brake when
the ignition is turned to the ON position. If the
brake system warning light does not illuminate at
this time, seek service immediately from your
dealership. Illumination after releasing the parking
SERVICE
ENGINE
SOON
CHECK
FUEL
CAP
P!
BRAKE
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
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Overdrive off:
Illuminates when the
overdrive function of
the transmission has been turned off, refer to the
Drivingchapter. If the light flashes steadily or does
not illuminate, have the transmission serviced soon,
or damage may occur.
Traction Control

active:Illuminates
when the Traction
Control
system is
active. If the light
remains on, have the system serviced immediately.
Anti-theft system:
Flashes when the
Securilock
Passive
Anti-theft System has been activated.
Turn signal:
Illuminates when the
left or right turn signal
or the hazard lights are turned on. If the indicators
stay on or flash faster, check for a burned out bulb.
High beams:
Illuminates when the
high beam headlamps
are turned on.
Key-in-ignition warning chime:Sounds when the
key is left in the ignition in the OFF/LOCK or ACC
position and the driver’s door is opened.
Headlamps on warning chime:Sounds when the
headlamps or parking lamps are on, the ignition is
off (the key is not in the ignition) and the driver’s
door is opened.O/D
OFF
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
13

start systems. Use of these systems may result in
vehicle starting problems and a loss of security
protection.
Note:Large metallic objects, electronic devices that
are used to purchase gasoline or similar items, or a
second coded key on the same key chain may cause
vehicle starting issues. You need to prevent these
objects from touching the coded key while starting
the engine. These objects will not cause damage to
the coded key, but may cause a momentary issue if
they are too close to the key when starting the
engine. If a problem occurs, turn the ignition off,
remove all objects on the key chain away from the
coded key and restart the engine.
Theft indicator
The theft indicator is located in the instrument
cluster.
•When the ignition is in the OFF position, the
indicator will flash once every 2 seconds to
indicate the SecuriLock
system is functioning as
a theft deterrent.
•When the ignition is in the ON position, the
indicator will glow for 3 seconds, then turn off to
indicate normal system functionality.
If a problem occurs with the SecuriLock
system,
the indicator will flash rapidly or glow steadily when
the ignition is in the ON position. If this occurs, the
vehicle should be taken to an authorized dealer for
service.
Automatic arming
The vehicle is armed
immediately after
switching the ignition
to the 3 (OFF)
position.
The
THEFTindicator
will flash every two
seconds when the
vehicle is armed.
3
2
1
5
4
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
61

Automatic disarming
Switching the ignition to the 4 (ON) position with a
coded keydisarms the vehicle.
•The
THEFTindicator will illuminate for three
seconds and then go out.
•If the
THEFTindicator stays on for an extended
period of time or flashes rapidly, have the system
serviced by your dealer.
Replacement keys
If your keys are lost or stolen and you don’t have an
extra coded key, you will need to have your vehicle
towed to a dealership. The key codes need to be
erased from your vehicle and new coded keys will
need to be programmed.
Replacing coded keys can be very costly. Store an
extra programmed key away from the vehicle in a
safe place to help prevent any inconveniences.
Please visit an authorized dealer to purchase
additional spare or replacement keys.
Programming spare keys
You can program your own coded keys to your
vehicle. Please read and understand the entire
procedure before you begin.
Tips:
•A maximum of eight keys can be coded to your
vehicle.
•Only use Securilock
keys.
•You must have two previously programmed coded
keys (keys that already operate your vehicle’s
engine) and the new unprogrammed key(s)
readily accessible.
•If no previously programmed coded keys are
available, you must take your vehicle to your
dealer to have the spare key(s) programmed.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
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system is off, the indicator will be illuminated. If a
system fault is detected while the traction control
system in on, the indicator lamp on the traction
control switch will be illuminated and your vehicle
should be serviced.
Aggressive driving in any road conditions
can cause you to lose control of your vehicle
increasing the risk of severe personal injury or
property damage. The occurrence of a Traction
Control
event is an indication that at least some
of the tires have exceeded their ability to grip the
road; this may lead to an increased risk of loss of
vehicle control, vehicle rollover, personal injury
and death. If you experience a severe road event,
SLOW DOWN.
TRACTION-LOK AXLE (IF EQUIPPED)
This axle provides added traction on slippery
surfaces, particularly when one wheel is on a poor
traction surface. Under normal conditions, the
Traction-Lok axle functions like a standard rear axle.
Extended use of other than the manufacturer’s
specified size tires on a Traction-Lok rear axle could
result in a permanent reduction in effectiveness.
This loss of effectiveness does not affect normal
driving and should not be noticeable to the driver.
AUTOMATIC TRANSMISSION OPERATION
(IF EQUIPPED)
Brake-shift interlock
This vehicle is equipped with a brake-shift interlock
feature that prevents the gearshift lever from being
moved from P (Park) when the ignition is in the ON
position unless the brake pedal is depressed.
If you cannot move the gearshift lever out of P
(Park) with ignition in the ON position and the
brake pedal depressed:
1. Apply the parking brake, turn ignition key to
LOCK, then remove the key.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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•If the oil level is below the MIN mark, add enough
oil to raise the level within the MIN—MAX range.
•OHV V6 engine
•4.6L SOHC V8 engine
•4.6L 4v V8 engine
(Mach 1)
•Oil levels above the MAX mark may cause engine
damage. Some oil must be removed from the
engine by a service technician.
7. Put the indicator back in and ensure it is fully
seated.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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unnecessary and could lead to engine damage that is
not covered by Ford warranty.
Change your engine oil according to the appropriate
schedule listed in the scheduled maintenance guide.
Ford production and aftermarket (Motorcraft) oil
filters are designed for added engine protection and
long life. If a replacement oil filter is used that does
not meet Ford material and design specifications,
start-up engine noises or knock may be experienced.
It is recommended you use the appropriate
Motorcraft oil filter (or another brand meeting Ford
specifications) for your engine application.
BATTERY
Your vehicle is
equipped with a
Motorcraft
maintenance-free
battery which normally
does not require
additional water during
its life of service.
However, for severe usage or in high temperature
climates, check the battery electrolyte level. Refer to
the scheduled maintenance guide for the service
interval schedules.
Keep the electrolyte level in each cell up to the
“level indicator”. Do not overfill the battery
cells.
If the electrolyte level in the battery is low, you can
add plain tap water to the battery, as long as you do
not use hard water (water with a high mineral or
alkali content). If possible, however, try to only fill
the battery cells with distilled water. If the battery
needs water often, have the charging system
checked.
If your battery has a cover/shield, make sure it
is reinstalled after the battery has been
cleaned or replaced.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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Cleaner air
Ford endorses the use of reformulated
“cleaner-burning”gasolines to improve air quality.
Running out of fuel
Avoid running out of fuel because this situation may
have an adverse affect on powertrain components.
If you have run out of fuel:
•You may need to cycle the ignition from OFF to
ON several times after refueling, to allow the fuel
system to pump the fuel from the tank to the
engine.
•Your“Service Engine Soon”indicator may come
on. For more information on the“Service Engine
Soon”indicator, refer to theInstrument cluster
chapter.
Fuel Filter
For fuel filter replacement, see your dealer or a
qualified service technician. Refer to the scheduled
maintenance guide for the appropriate intervals for
changing the fuel filter.
Replace the fuel filter with an authorized
Motorcraft part. The customer warranty may
be void for any damage to the fuel system if an
authorized Motorcraft fuel filter is not used.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel
economy is you, the driver. You must gather
information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel
gauge readings are NOT accurate as a measure of
fuel economy. We do not recommend taking fuel
economy measurements during the first 1,600 km
(1,000 miles) of driving (engine break-in period).
You will get a more accurate measurement after
3,000 km–5,000 km (2,000 miles-3,000 miles).
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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