On board diagnostics (OBD-II)
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. When theCheck
engine/Service engine soonlight illuminates, the OBD-II system has
detected a malfunction. Temporary malfunctions may cause yourCheck
engine/Service 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 securely tightened.
These temporary malfunctions can be corrected by filling the fuel tank
with good quality fuel and/or properly tightening the fuel cap. After three
driving cycles without these or any other temporary malfunctions
present, theCheck engine/Service engine soonlight 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 engine/Service engine soonlight remains on, have your
vehicle serviced at the first available opportunity.
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 yourCheck engine/Service engine
soonlight is on, refer to the description in theWarning lights and
chimessection of theInstrument Clusterchapter. Your vehicle may not
pass the I/M test with theCheck engine/Service engine soonlight 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.
REVIEW COPY
2005 U137 Excursion(hdw), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
248
A
Accessory delay ..........................66
Air bag supplemental restraint
system ........................................117
and child safety seats ............119
description ..............................117
disposal ....................................121
driver air bag ..........................119
indicator light .........................121
operation .................................119
passenger air bag ...................119
Air cleaner filter ...............253–255
Air conditioning ..........................45
Antifreeze
(see Engine coolant) ................233
Anti-lock brake system
(see Brakes) ......................172–173
Audio system (see Radio) ...17, 21
Automatic transmission
driving an automatic
overdrive .........................177, 179
fluid, adding ............................250
fluid, checking ........................250
fluid, refill capacities ..............256
fluid, specification ..................262
Auxiliary power point .................64
Axle
lubricant specifications ..259, 262
refill capacities ........................256
traction lok ..............................175
B
Battery .......................................231
acid, treating emergencies .....231
jumping a disabled battery ....204
maintenance-free ....................231
replacement, specifications ...255servicing ..................................231
BeltMinder .................................112
Brakes ........................................172
anti-lock ...........................172–173
anti-lock brake system (ABS)
warning light ...........................172
fluid, checking and adding ....250
fluid, refill capacities ..............256
fluid, specifications .........259, 262
lubricant specifications ..259, 262
parking ....................................173
shift interlock ..........................176
Break-in period .............................5
Bulbs ............................................54
C
Capacities for refilling fluids ....256
Cargo net .....................................82
Cell phone use ............................81
Certification Label ....................263
Changing a tire .........................140
Child safety restraints ..............122
child safety belts ....................122
Child safety seats ......................124
attaching with tether straps ..128
in front seat ............................126
in rear seat ..............................126
Cleaning your vehicle
engine compartment ..............220
instrument panel ....................222
interior .....................................222
interior trim ............................222
plastic parts ............................221
safety belts ..............................222
washing ....................................219
waxing .....................................219
wheels ......................................220
REVIEW COPY
2005 U137 Excursion(hdw), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Index
Index
268
