service reset Mercury Grand Marquis 2003 Owner's Manuals

The message center will remain in
the DTE function until the SELECT
control is pressed to change
functions.
DTE is calculated using a running
average fuel economy, which is
based on your recent driving history
of 800 km (500miles). This value is
not the same as the average fuel
economy display. The running average fuel economy is reinitialized to a
factory default value if the battery is disconnected.
If “CO” or “CS” is displayed, there is a problem with the fuel indication
system and you should contact your dealer for service as soon as
possible.
AVG FUEL ECONOMY (average fuel economy)
Select this function to display your
average fuel economy in liters/100
km or miles/gallon.
If you calculate your average fuel
economy by dividing miles traveled by gallons used, your figure may be
different than displayed for the following reasons:
•your vehicle was not perfectly level during fill-up
•differences in the automatic shut-off points on the fuel pumps at
service stations
•variations in top-off procedure from one fill-up to another
•rounding of the displayed values to the nearest 0.1 liter (gallons)
Press the RESET control while AVG
ECON is displayed to reset the
function.
The average displayed is the average
since the last reset.RESET E/M SELECT
TRIP
ATRIP
BAVG
SPEED
DISTANCE
TO EMPTYAVG FUEL
ECONOMY
RESET E/M SELECT
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Driver Controls
88

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 yourWarranty Guidefor 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 “Check Engine/Service Engine
Soon” light is on, refer to the description in theWarning lights and
chimessection of theInstrument clusterchapter. Your vehicle may not
pass the I/M test with the “Check Engine/Service Engine Soon” light on.
If the vehicle’s powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a “not ready for I/M test”
condition. To ready the on-board diagnostics system for I/M testing, a
minimum of 30 minutes of city and highway driving is necessary as
described below:
•First, at least 10 minutes of driving on an expressway or highway.
•Next, 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.
CHECKING AND ADDING POWER STEERING FLUID
Check the power steering fluid.
Refer to the scheduled maintenance
guide for the service interval
schedules. If adding fluid is
necessary, use only MERCONAT F.
1. Start the engine and let it run until it reaches normal operating
temperature (the engine coolant temperature gauge indicator will be
near the center of the normal area between H and C).
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
219