1999 FORD MUSTANG check engine light

WARNING LIGHTS AND CHIMES
Base instrument cluster
Optional instrument cluster
Turn signal
Illuminates when the
left or right turn signal
or the hazard lights are
turned on. If one or
both of the indicators stay on continuously or flash
faster, check for a burned-out turn signal bulb. Refer
toExterior bulbsin theMaintenance and care
chapter.
P! BRAKE
L
0
00000 00
C
E
FH
LH
10 203020 406080100
120
140
160
180
405060 70
80
90
100
11 0
1204
5
6
7 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
P! BRAKE
L
0
00000 00
C
E
FH
LH
102040608020 40608010 012 0 14 0
160
180
200
220
240
100
120
140
305070 90
110
13 0
1504
5
6
7
8 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
Instrumentation
6

Service engine soon
Your vehicle is equipped
with a computer that
monitors the engine's
emission control system.
This system is
commonly known as the On Board Diagnostics System
(OBD II). The OBD II system protects the environment
by ensuring that your vehicle continues to meet
government emission standards. The OBD II system
also assists the service technician in properly servicing
your vehicle.
TheService Engine Soonindicator light illuminates
when the ignition is first turned to the ON position
to check the bulb. If it comes on after the engine is
started, one of the engine's emission control systems
may be malfunctioning. The light may illuminate
without a driveability concern being noted. The
vehicle will usually be drivable and will not require
towing.
What you should do if the Service Engine Soon
light illuminates
Light turns on solid:
This means that the OBD II system has detected a
malfunction.
Temporary malfunctions may cause yourService
Engine Soonlight to illuminate. Examples are:
1. The vehicle has run out of fuel. (The engine may
misfire or run poorly.)
2. Poor fuel quality or water in the fuel.
3. The fuel cap may not have been properly installed
and securely tightened.
These temporary malfunctions can be corrected by
filling the fuel tank with good quality fuel and/or
properly installing and securely tightening the gas
cap. After three driving cycles without these or any
other temporary malfunctions present, theService
Engine Soonlight should turn off. (A driving cycle
SERVICE
ENGINE
SOON
Instrumentation
8

Traction ControlYactive
This light momentarily
illuminates when the
ignition is turned to
ON. It also illuminates
when the Traction Controlysystem begins applying
and releasing the brakes and adjusting the engine
characteristics to limit a wheelspin condition. It will
be lit for a minimum of four seconds or for the
duration of the Traction Controlyevent.
For more information, refer to theDrivingchapter.
Anti-lock brake system (ABS)
Momentarily illuminates
when the ignition is
turned to the ON
position and the engine
is off. If the light remains on, continues to flash or
fails to illuminate, have the system serviced
immediately. With the ABS light on, the anti-lock
brake system is disabled and normal braking is still
effective unless the brake warning light also remains
illuminated with parking brake released.
Brake system warning
Momentarily illuminates
when the ignition is
turned to the ON
position and the engine
is off. If brake warning lamp does not illuminate at
this time, seek service immediately. Also illuminates
when the parking brake is engaged. Illumination
after releasing the parking brake indicates low brake
fluid level and the brake system should be inspected
immediately.
Check coolant
Illuminates when the
coolant level in the
coolant reservoir is low
ABS
P!
BRAKE
Instrumentation
10

BRAKES
Your service brakes are self-adjusting. Refer to the
scheduled maintenance guide for scheduled
maintenance.
Occasional brake noise is normal and often does not
indicate a performance concern with the vehicle's
brake system. In normal operation, automotive brake
systems may emit occasional or intermittent squeal
or groan noises when the brakes are applied. Such
noises are usually heard during the first few brake
applications in the morning; however, they may be
heard at any time while braking and can be
aggravated by environmental conditions such as
cold, heat, moisture, road dust, salt or mud. If a
ªmetal-to-metal,º ªcontinuous grindingº or
ªcontinuous squealº sound is present while braking,
the brake linings may be worn-out and should be
inspected by a qualified service technician.
Anti-lock brake system (ABS) (if equipped)
On vehicles equipped with an anti-lock braking
system (ABS), a noise from the hydraulic pump
motor and pulsation in the pedal may be observed
during ABS braking events. Pedal pulsation coupled
with noise while braking under panic conditions or
on loose gravel, bumps, wet or snowy roads is
normal and indicates proper functioning of the
vehicle's anti-lock brake system. The ABS performs a
self-check at 17 km/h (10 mph) after you start the
engine and begin to drive away. A brief mechanical
noise may be heard during this test. This is normal.
If a malfunction is found, the ABS warning light will
come on. If the vehicle has continuous vibration or
shudder in the steering wheel while braking, the
vehicle should be inspected by a qualified service
technician.
Driving
92

SERVICE RECOMMENDATIONS
To help you service your vehicle:
²We highlight do-it-yourself items in the engine
compartment for easy location.
²We provide a Scheduled Maintenance Guide which
makes tracking routine service easy.
If your vehicle requires professional service, your
dealership can provide necessary parts and service.
Check your ªWarranty Guideº to find out which parts
and services are covered.
Use only recommended fuels, lubricants, fluids and
service parts conforming to specifications. Motorcraft
parts are designed and built to provide the best
performance in your vehicle.
PRECAUTIONS WHEN SERVICING YOUR
VEHICLE
Be especially careful when inspecting or servicing
your vehicle.
²Do not work on a hot engine.
²When the engine is running, keep loose clothing,
jewelry or long hair away from moving parts.
²Do not work on a vehicle with the engine running
in an enclosed space, unless you are sure you
have enough ventilation.
²Keep all lit cigarettes, open flames and other lit
material away from the battery and all fuel related
parts.
If you disconnect the battery, the engine must
ªrelearnº its idle conditions before your vehicle will
drive properly, as explained in theBatterysection in
this chapter.
Working with the engine off
²Automatic transmission:
1. Set the parking brake and ensure the gearshift is
securely latched in P (Park).
Maintenance and care
130

WINDSHIELD WASHER FLUID
Checking and adding washer fluid
Check the washer fluid
whenever you stop for
fuel. The reservoir is
highlighted with a
symbol.
If the level is low, add
enough fluid to fill the
reservoir. In very cold
weather, do not fill the
reservoir all the way.
Do not put engine coolant in the container
for the windshield washer fluid.
Maintenance and care
140

²Combine errands and minimize stop-and-go
driving.
Maintenance
²Keep tires properly inflated and use only
recommended size.
²Operating a vehicle with the wheels out of
alignment will reduce fuel economy.
²Use recommended engine oil. Refer toLubricant
Specifications.
²Perform all regularly scheduled maintenance
items. Follow the recommended maintenance
schedule and owner maintenance checks found in
your vehicle Scheduled Maintenance Guide.
Conditions
²Heavily loading a vehicle or towing a trailer may
reduce fuel economy at any speed.
²Carrying unnecessary weight may reduce fuel
economy (approximately 2 km/h [1 mpg] is lost
for every 180 kg [400 lb] of weight carried).
²Adding certain accessories to your vehicle (for
example bug deflectors, rollover/light bars,
running boards, ski/luggage racks) may reduce
fuel economy.
²Using fuel blended with alcohol may lower fuel
economy.
²Fuel economy may decrease with lower
temperatures during the first 12±16 km (8±10
miles) of driving.
²Driving on flat terrain offers improved fuel
economy as compared to driving on hilly terrain.
²Transmissions give their best fuel economy when
operated in the top cruise gear and with steady
pressure on the gas pedal.
²Close windows for high speed driving.
Maintenance and care
167

Do not park, idle, or drive your vehicle in
dry grass or other dry ground cover. The
emission system heats up the engine compartment
and exhaust system, which can start a fire.
Illumination of the charging system warning light,
ªService Engine Soonº light or the temperature
warning light, fluid leaks, strange odors, smoke or
loss of oil pressure, could indicate that the emission
control system is not working properly.
Exhaust leaks may result in entry of harmful
and potentially lethal fumes into the
passenger compartment.
Do not make any unauthorized changes to your
vehicle or engine. By law, vehicle owners and anyone
who manufactures, repairs, services, sells, leases,
trades vehicles, or supervises a fleet of vehicles are
not permitted to intentionally remove an emission
control device or prevent it from working.
Information about your vehicle's emission system is
on the Vehicle Emission Control Information Decal
located on or near the engine. This decal identifies
engine displacement and gives some tune up
specifications.
Please consult your ªWarranty Guideº for complete
emission warranty information.
Readiness for Inspection/Maintenance (I/M)
testing
In some localities, it may be a legal requirement to
pass an I/M test of the on-board diagnostics system.
If your ªCheck Engine/Service Engine Soonº light is
on, refer to the description in theWarning Lights
and Chimessection of theInstrumentation
chapter. Your vehicle may not pass the I/M test with
the ªCheck Engine/Service Engine Soonº light on.
Maintenance and care
169