2006 JEEP WRANGLER check engine light

keys that have been programmed to the vehicle can be
used to start and operate the vehicle for longer than the
2 second validation time period.
The Sentry Key Immobilizer System does not need to be
armed or activated. Operation of the system is automatic
regardless of whether or not the vehicle is locked or
unlocked. During normal operation, the SKIM indicator
light will come on for 3 seconds immediately after the
ignition switch is turned on for a bulb check. Afterwards,
if the bulb remains on, this indicates a malfunction in the
electronics. If the bulb begins to flash immediately after
the ignition switch is turned on, this indicates that an
invalid key is being used to start the vehicle. Both of
these conditions will result in the engine being shut
down after 2 seconds of running. Keep in mind that a key
which has not been programmed is also considered an
invalid key even if it is cut to fit the ignition for that
vehicle. If the SKIM indicator light comes on during normal
vehicle operation (it has been running for longer than 10
seconds) a fault has been detected in the electronics and
the vehicle should be serviced as soon as possible.
NOTE:
•The Sentry Key Immobilizer System is not compatible
with remote starting systems. Use of these systems
may result in vehicle starting problems and loss of
security protection.
•Mobil Speedpass™, additional Sentry Keys, or any
other transponder equipped components on the same
keychain will not cause a key-related (Transponder)
fault unless the additional part is
physically held
against the ignition key being used when starting the
vehicle. Also, cell phones, pagers, or other RF electron-
ics will not cause interference with this system.
All of the keys provided with your new vehicle have
been programmed to the vehicle electronics.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
2

13. Oil Pressure Gauge Indicates engine oil pressure. This gauge does not
indicate oil level, and pressure varies with engine
speed, temperature and oil viscosity. Consistent lower
readings indicate possible malfunction. Seek authorized
service.
14. Coolant Temperature Gauge Indicates engine coolant temperature. The red
zone to the far right indicates possible overheat-
ing. Seek authorized service immediately if the
gauge operates in the red zone. In U.S. vehicles, tempera-
ture is indicated in degrees fahrenheit; in Canadian
vehicles in degrees centigrade.
15. Airbag Warning Light This indicator lights and remains lit for 6 to 8
seconds when the ignition is first turned on. If
the light does not come on for 6 to 8 seconds, stays on or comes on while driving, have the airbag
system checked by an authorized dealer.
16. Check Gauges Warning Light
This light monitors the engine coolant tem-
perature, engine oil pressure, and voltage
gauges. If it detects an extreme condition a
chime will sound and the light will come on. If the light
comes on, check the operation of these gauges for a
malfunction condition.
17. Malfunction Indicator Light This light is a part of an Onboard Diagnostic
System called OBD II that monitors engine, and
automatic transmission control systems. The light
will illuminate when the ignition is in the ON position
before engine start. If the bulb does not come on when
turning the key from OFF to ON, have the condition
checked promptly.
UNDERSTANDING YOUR INSTRUMENT PANEL 149
4

If using a manual transmission vehicle for trailer towing,
all starts must be in FIRST gear to avoid excessive clutch
slippage.
Towing Tips — Automatic Transmission
The “D” range can be selected when towing. However, if
frequent shifting occurs while in this range, the “3” range
should be selected.
NOTE: Using the “3” range while operating the vehicle
under heavy operating conditions will improve perfor-
mance and extend transmission life by reducing exces-
sive shifting and heat build up. This action will also
provide better engine braking.
The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than
45 minutes of continuous operation. See “Schedule B” in
section 8 of this manual for transmission fluid change
intervals. NOTE:
Check the automatic transmission fluid level
before towing.
Towing Tips — O/D Off (If Equipped)
To reduce potential for automatic transmission overheat-
ing, turn the “O/D OFF” feature ON when driving in
hilly areas or shift the transmission to Drive position 2 on
more severe grades. Refer to “Transmission Shifting” in
this section.
Towing Tips — Electronic Speed Control (If
Equipped)

Don’t use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
STARTING AND OPERATING 247
5

Once a Month
•Check the tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of the coolant reservoir, brake
master cylinder, and transmission, and add as needed.
•Check all lights and all other electrical items for correct
operation. At Each Oil Change
•Change the engine oil filter.
•Inspect the exhaust system.
•Inspect brake hoses.
•Check the coolant level, hoses, and clamps.
•After completion of off-road operation, the underside
of the vehicle should be thoroughly inspected. Exam-
ine threaded fasteners for looseness.
320 MAINTENANCE SCHEDULES
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M
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About Your Brakes....................... 203
ABS (Anti-Lock Brake System) ............151,205
Add-A-Trunk ........................... 74
Adding Washer Fluid ..................... 141
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 278
Air Conditioner Maintenance ............... 280
Air Conditioning ........................ 174
Air Conditioning Controls ................. 175
Air Conditioning, Operating Tips ............ 177
Air Conditioning Refrigerant ............... 281
Air Filter .............................. 278
Air Pressure, Tires ....................... 222
Airbag ................................ 27
Airbag Deployment ....................... 32
Airbag Light ......................... 34,149
Airbag Maintenance ....................... 33
Alignment and Balance ................... 227
Alterations/Modifications, Vehicle ............. 9
Antenna, Satellite Radio ................... 171 Antifreeze (Engine Coolant)
................ 314
Anti-Lock Brake System (ABS) .............. 205
Anti-Lock Warning Light .................. 151
Appearance Care ........................ 297
Automatic Dimming Mirror ................. 52
Automatic Transmission ................188,292
Adding Fluid ......................... 294
Fluid and Filter Changes ................. 292
Fluid Level Check ...................... 293
Fluid Type ........................... 292
Gear Ranges .......................... 189
Shifting ............................. 188
Special Additives ...................... 294
Torque Converter ...................... 194
Auxiliary Electrical Outlet (Power Outlet) ....... 71
Auxiliary Power Outlet .................... 71
Axle Lock ............................. 199
Battery ............................... 278
348 INDEX

Emergency Starting..................... 258
Voltmeter ............................ 147
Belts, Drive ............................ 275
Belts, Seat .............................. 20
Body Mechanism Lubrication ............... 282
B-Pillar Location ........................ 217
Brake System ........................... 290
Anti-Lock (ABS) ....................... 205
Hoses .............................. 290
Master Cylinder ....................... 291
Parking ............................. 200
Warning Light ........................ 151
Brakes ............................... 203
Brake/Transmission Interlock ............... 189
Break-In Recommendations, New Vehicle ........ 44
Bulb Replacement ..................... 309,310
Calibration, Compass ...................... 54
Capacities, Fluid ........................ 314 Caps, Filler
Fuel ................................ 233
Power Steering ........................ 281
Car Washes ............................ 298
Carbon Monoxide Warning ................. 232
Carpeting ............................. 301
Catalytic Converter ...................... 275
Caution, Exhaust Gas ...................... 45
CD (Compact Disc) Changer ................ 158
CD (Compact Disc) Player .........154,157,160,163
CD (Compact Disc) Player Maintenance ........ 171
Cellular Phone .......................... 172
Center High Mounted Stop Light ............ 313
Chains, Tire ............................ 228
Changing A Flat Tire ..................... 254
Chart, Tire Sizing ........................ 214
Check Engine Light
(Malfunction Indicator Light) .............149,269
Child Restraint ...................... 34,39,42
INDEX 349
10

Oil Filter............................ 274
Oil Pressure Gauge ..................... 149
Oil Selection .......................... 314
Overheating .......................... 253
Starting ............................. 182
Temperature Gauge ..................... 149
Timing Belt .......................... 277
Engine Oil Viscosity ...................... 274
Engine Oil Viscosity Chart ................. 274
Entry System, Illuminated .................. 17
Exhaust Gas Caution ................... 45,232
Exhaust System ......................... 283
Extender, Seat Belt ........................ 26
Exterior Finish Care ...................... 298
Fabric Care ......................... 300,302
Fabric Top ............................. 302
Filters Air Cleaner .......................... 278 Engine Fuel
.......................... 278
Engine Oil ........................... 274
Finish Care ............................ 298
Flashers Hazard Warning ....................... 252
Turn Signal ..................... 147,311,313
Flooded Engine Starting ................... 183
Fluid Capacities ......................... 314
Fluid Level Checks ...................... 296
Automatic Transmission ................. 292
Engine Oil ........................... 271
Manual Transmission ................... 294
Power Steering ........................ 281
Fluids, Lubricants and Genuine Parts .......... 315
Fog Light Service ........................ 311
Fog Lights ........................... 66,311
Folding Rear Seat ........................ 59
Folding Windshield ...................... 132
Four Wheel Drive ....................... 194
352 INDEX

Key-In Reminder......................... 14
Keys ................................. 13
Lane Change and Turn Signals .............. 147
Lap Belts .............................. 20
Lap/Shoulder Belts ....................... 20
LATCH
(Lower Anchors and Tether for CHildren) .....38,39
Lead Free Gasoline ...................... 229
Lights ................................. 64
Airbag ............................ 34,149
Anti-Lock ........................... 151
Anti-Lock Warning ..................... 151
Back-Up ............................. 313
Brake Warning ........................ 151
Bulb Replacement ...................... 310
Center Mounted Stop ................... 313
Check Engine (Malfunction Indicator) ........ 149
Check Gauges ........................ 149 Cruise
.............................. 147
Daytime Running ....................... 66
Dimmer Switch, Headlight ................ 65
Fog .............................. 66,311
Headlight Switch ....................... 64
Headlights ........................... 310
High Beam ........................... 148
High Beam Indicator .................... 148
Instrument Cluster ...................... 64
Interior .............................. 64
Lights On Reminder ..................... 65
Low Fuel ............................ 151
Passing .............................. 65
Rear Servicing ........................ 313
Rear Tail ............................ 313
Seat Belt Reminder ..................... 148
Sentry Key ........................... 147
Service .............................. 310
Side Marker .......................... 313
INDEX 355
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