service reset FORD EXPLORER 1999 2.G Owners Manual

WARNING LIGHTS AND CHIMES
Check engine
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). This 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.
TheCheck Engineindicator 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 check engine light illuminates
Light turns on solid:
This means that the OBD II system has detected a malfunction.
Temporary malfunctions may cause yourCheck Enginelight 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.
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RPMx1000
ABS!BRAKE
CHECK
ENGINE
FUEL
RESET
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DOOR
AJAR
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GAGE
CHECK
SUSP
CHECK
ENGINE
Instrumentation
6

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, theCheck Enginelight should turn off.
(A driving cycle consists of a cold engine startup followed by mixed
city/highway driving.) No additional vehicle service is required.
If theCheck Enginelight remains on, have your vehicle serviced at the
first available opportunity.
Light is blinking:
Engine misfire is occurring which could damage your catalytic converter.
You should drive in a moderate fashion (avoid heavy acceleration and
deceleration) and have your vehicle serviced at the first available
opportunity.
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.
Fuel reset
Illuminates when the ignition is
turned to the ON position and the
fuel pump shut-off switch has been
triggered. For more information,
refer toFuel pump shut-off switch
in theRoadside emergencieschapter.
Air bag readiness
Momentarily illuminates when the
ignition is turned ON. If the light
fails to illuminate, continues to flash
or remains on, have the system
serviced immediately.
FUEL
RESET
Instrumentation
7

For maximum accuracy of this display feature, the ignition should be in
the OFF position during fueling. The display FUEL LEVEL ERROR
indicates a problem with the fuel indication system. See your dealer or
qualified service technician for system maintenance.
Fuel status
Press once to display the
approximate amount of fuel
remaining in the fuel tank.
Press again to display the
approximate amount of fuel used
since the system was last reset.
Fuel economy
Press to display your vehicle's
average fuel economy in liters/100
km or (miles/gallons).
Reset
Press the reset control to reset the
current feature being displayed.
Warnings, distance driven, average
fuel economy, fuel used and
personalized oil reset percentage are
the only features that respond to
reset.
ENGLISH/
METRICRANGESTATUS
ECONRESETSYSTEM
CHECKOIL
CHANGE
RESET
FUEL
ENGLISH/
METRICRANGESTATUS
ECONRESETSYSTEM
CHECKOIL
CHANGE
RESET
FUEL
ENGLISH/
METRICRANGESTATUS
ECONRESETSYSTEM
CHECKOIL
CHANGE
RESET
FUEL
Instrumentation
16

System check
Press the system check control to
display the status of the following
systems:
²engine oil life left
²engine oil level
²voltage level
²engine coolant temperature
²washer fluid level
²fuel level
The engine oil life left has two phases. The first display will indicate the
oil change status (OK, SOON, REQUIRED). The second display will
indicate the percentage of oil life remaining. The display OIL TEMP
SIGNAL ERROR indicates a problem with the system. Following this
display, contact your dealer or qualified service technician for system
maintenance.
Operating the message center during system check
The message center controls can be operated as follows during the
system check sequence:
1. Press the system check controls to advance to the next display.
2. Press the reset control to immediately conclude the system check.
3. Press the range, fuel status or fuel economy control to conclude the
system check and display the requested feature.
4. Press the metric/English control to conclude the system check and
change the previous display to the new mode.
5. Press the oil change reset control to conclude the system check and
begin the oil change reset procedure.
An oil change is recommended whenever indicated by the message
center. Use only recommended engine oils.
The message center will tell you the percent of oil life left during system
check. This percentage is based on your driving history and the time
since your last oil change. In order to ensure accurate oil life left
indications, you should only perform the following procedure after you
have the oil changed.
ENGLISH/
METRICRANGESTATUS
ECONRESETSYSTEM
CHECKOIL
CHANGE
RESET
FUEL
Instrumentation
17

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 diagnostic (OBD-II) system. If your ªCheck Engine/Service
Engine Soonº light is on, refer to the description in theWarning Lights
and Chimessection of theInstrumentationchapter. Your vehicle may
not pass the I/M test with the ªCheck Engine/Service Engine Soonº light
on.
If the vehicle's powertrain system or its battery has just been serviced,
the OBD-II system is reset to a ªnot ready for I/M testº condition. To
ready the OBD-II system for I/M testing, a minimum of 30 minutes of city
and highway driving is necessary as described below:
²First, at least 10 minutes of driving on an expressway or highway.
²Next, at least 20 minutes driving in stop-and-go, city-type traffic with
at least four idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete.
EXTERIOR BULBS
Replacing exterior bulbs
Check the operation of the following lamps frequently:
²Headlamps
²Foglamps
²High-mount brakelamp
²Brakelamps
²Turn signals
²License plate lamp
²Tail lamps
²Back-up lamps
Do not remove lamp bulbs unless they can be replaced immediately with
new ones. If a bulb is removed for an extended period of time,
contaminants may enter the lamp housings and affect lamp performance.
Maintenance and care
236