2008 JEEP PATRIOT immobilizer

SENTRY KEY
The Sentry KeyImmobilizer System prevents unautho-
rized vehicle operation by disabling the engine. The
system does not need to be armed or activated. Operation
is automatic, regardless of whether the vehicle is locked
or unlocked.
The system uses ignition keys that have an embedded
electronic chip (transponder) to prevent unauthorized
vehicle operation. Therefore, only keys that are pro-
grammed to the vehicle can be used to start and operate
the vehicle. The system will shut the engine off in two
seconds if someone uses an invalid key to try to start the
engine.
NOTE:A key that has not been programmed is also
considered an invalid key, even if it is cut to fit the
ignition switch lock cylinder for that vehicle.
During normal operation, after turning on the ignition
switch, the Vehicle Security Light will turn on for threeseconds for a bulb check. If the light remains on after the
bulb check, it indicates that there is a problem with the
electronics. In addition, if the light begins to flash after
the bulb check, it indicates that someone used an invalid
key to try to start the engine. Either of these conditions
will result in the engine being shut off after two seconds.
If the Vehicle Security Light turns on during normal
vehicle operation (vehicle running for longer than 10
seconds), it indicates that there is a fault in the electron-
ics. Should this occur, have the vehicle serviced as soon
as possible.
NOTE:
•The Sentry KeyImmobilizer System is not compat-
ible with some aftermarket remote starting systems.
Use of these systems may result in vehicle starting
problems and loss of security protection.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
2

•Exxon/Mobil Speedpass™, additional Sentry Keys,
or any other transponder-equipped components on
the same key chain willnotcause a key-related
(transponder) fault unless the additional part isphysi-
cally held against the ignition keybeing used when
starting the vehicle. Cell phones, pagers, or other RF
electronics will not cause interference with this system.
All of the keys provided with your new vehicle have
been programmed to the vehicle electronics.
Replacement Keys
NOTE:Only keys that are programmed to the vehicle
electronics can be used to start and operate the vehicle.
Once a Sentry Keyis programmed to a vehicle, it cannot
be programmed to any other vehicle.
CAUTION!
Always remove the Sentry Keysfrom the vehicle
and lock all doors when leaving the vehicle
unattended.
At the time of purchase, the original owner is provided
with a four-digit Personal Identification Number (PIN).
Keep the PIN in a secure location. This number is
required for authorized dealer replacement of keys. Du-
plication of keys may be performed at an authorized
dealer or by following the customer key programming
procedure. This procedure consists of programming a
blank key to the vehicle electronics. A blank key is one
that has never been programmed.
NOTE:When having the Sentry KeyImmobilizer
System serviced, bring all vehicle keys with you to an
authorized dealer.
16 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Gasoline, Reformulated................... 312
Gauges
Coolant Temperature.................... 177
Fuel................................ 172
Odometer........................... 179
Tachometer.......................... 174
Gearshift.............................. 246
General Information................. 18,109,310
General Maintenance..................... 352
Glass Cleaning.......................... 380
Gross Axle Weight Rating.................. 318
Gross Vehicle Weight Rating.............317,318
Hands-Free Phone (UConnect) .............. 82
Hazard Warning Flasher................... 332
Head Restraints......................... 113
Headlights............................ 386
Cleaning............................ 380
High Beam........................124,173High Beam/Low Beam Select Switch........ 124
Passing............................. 125
Replacing............................ 386
Switch .............................. 121
Heated Seats........................... 114
Hill Descent Control...................137,181
Hitches
TrailerTowing ........................ 320
HomeLink(Garage Door Opener) Transmitter . . . 142
Hood Release.......................... 118
Hoses................................ 370
Ignition............................... 12
Key ................................. 12
Ignition Key Removal..................... 12
Immobilizer (Sentry Key)................. 15,19
Infant Restraint.......................... 61
Information Center, Vehicle................. 183
Inside Rearview Mirror.................... 78
424 INDEX

Instrument Cluster....................... 172
Instrument Panel and Controls.............. 170
Instrument Panel Cover................... 380
Instrument Panel Lens Cleaning............. 381
Integrated Power Module (Fuses)............ 382
Interior Appearance Care.................. 379
Intermittent Wipers (Delay Wipers)........... 128
Introduction............................. 4
Jack Location........................... 334
Jack Operation.......................334,336
Jacking Instructions...................... 336
Jump Starting.......................... 340
Key, Programming........................ 17
Key, Replacement........................ 16
Key, Sentry (Immobilizer)................... 15
Key-In Reminder......................... 14
Keyless Entry System (Sedan)................ 19Keys................................. 12
Knee Bolster............................ 48
Lane Change and Turn Signals...........173,389
Lap/Shoulder Belts....................... 36
Latches
Hood............................... 118
Lead Free Gasoline....................... 311
LifeofTires ............................ 298
Liftgate (Sedan).......................... 33
Liftgate Window Wiper/Washer............. 162
LightBulbs ............................ 385
Lights .............................. 71,120
Airbag........................ 53,57,70,173
Back-Up............................. 389
Brake Warning........................ 175
Bulb Replacement...................... 386
Cargo .............................. 156
Center Mounted Stop................... 392
INDEX 425
10

Safety Checks Inside Vehicle................. 70
Safety Checks Outside Vehicle............... 71
Safety Defects, Reporting.................. 413
Safety Information, Tire................... 283
Safety Tips............................. 69
Satellite Radio.......................217,220
Satellite Radio Antenna................... 223
Schedule, Maintenance.................... 400
Seat Belt Maintenance.................... 381
Seat Belt Reminder....................... 46
Seat Belts.............................. 35
Adjustable Shoulder Belt.................. 41
Adjustable Upper Shoulder Anchorage........ 41
And Pregnant Women................... 48
Child Restraint......................... 60
Extender............................. 47
Front Seat............................ 36
Pretensioners.......................... 45
Rear Seat............................. 36Reminder............................ 174
Seats................................. 109
Adjustment.......................... 109
Cleaning............................ 378
Head Restraints....................... 113
Heated.............................. 114
Lumbar Support....................... 111
Rear Folding......................... 116
Rear Folding (Sedan).................... 116
Seatback Release....................... 112
Tilting .............................. 112
Security Alarm (Theft Alarm)................ 18
Selection of Oil......................... 354
Sentry Key (Immobilizer)................. 15,19
Sentry Key Programming................... 17
Sentry Key Replacement................... 16
Service Assistance....................... 409
Service Contract......................... 411
Service Manuals........................ 414
430 INDEX