What you should know about fail-safe cooling
If the engine coolant supply is depleted, this feature allows the vehicle to
be driven temporarily before incremental component damage is incurred.
The“fail-safe”distance depends on ambient temperatures, vehicle load
and terrain.
How fail-safe cooling works
•Standard cluster
•Optional cluster
If the engine begins to overheat:
•The engine coolant temperature gauge will move to the H (hot) area
(if your vehicle is equipped with analog gauges).
•The engine coolant temperature gauge will illuminate all eight bars
and a tone will sound every five seconds for one minute (if your
vehicle is equipped with digital gauges).
•TheCheck Engineindicator light will illuminate.
If the engine reaches a preset over-temperature condition, the engine
will automatically switch to alternating cylinder operation. Each disabled
cylinder acts as an air pump and cools the engine.
When this occurs the vehicle will still operate. However:
•The engine power will be limited.
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2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
195
recommendations ...................187
refill capacities ........................225
specifications ..................226, 228
Exhaust fumes ..........................127
F
Fail safe cooling ........................195
Floor mats ...................................71
Fluid capacities .........................225
Fuel ............................................196
calculating fuel
economy ............................52, 201
cap ...........................................198
capacity ...................................225
choosing the right fuel ...........199
comparisons with EPA fuel
economy estimates .................204
detergent in fuel .....................200
filling your vehicle
with fuel ..................196, 198, 201
filter, specifications ........201, 224
fuel pump shut-off switch .....145
improving fuel economy ........201
octane rating ...................200, 228
quality ......................................200
running out of fuel .................200
safety information relating to
automotive fuels .....................196
Fuses ..................................146–147
G
Garage Door Opener
(see Homelink wireless control
system) ........................................63
Gas cap (see Fuel cap) ............198
Gas mileage
(see Fuel economy) .................201
Gauges .........................................15H
Hazard flashers .........................145
Head restraints ...........................86
Headlamps ...................................36
aiming ........................................38
autolamp system .......................36
bulb specifications ....................40
daytime running lights .............36
flash to pass ..............................37
high beam .................................37
replacing bulbs .........................41
turning on and off ....................36
Heating
heating and air conditioning
system .................................32–33
HomeLink universal
transceiver (see
Garage door opener) ............53, 66
Homelink wireless control
system ..........................................63
Hood ..........................................182
I
Ignition ...............................123, 228
Infant seats
(see Safety seats) .....................114
Inspection/maintenance
(I/M) testing ..............................206
Instrument panel
cleaning ...................................178
cluster ........................................10
lighting up panel
and interior ...............................37
J
Jack ............................................153
Index
237
