Jeep Cherokee
 Owners Manual
Things to know before starting your vehicle
Sentry key

The Sentry Key Immobilizer system prevents unauthorized 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 a Key Fob with a factory-mated Remote Keyless Entry (RKE) transmitter, a Keyless Push Button Ignition and a RF receiver to prevent unauthorized vehicle operation. Therefore, only Key Fobs that are programmed to the vehicle can be used to start and operate the vehicle. The system will not allow the engine to crank with an invalid Key Fob.

After placing the ignition to the ON/RUN position, the Vehicle Security Light will turn on for three seconds for a bulb check. If the light remains on after the bulb check, it indicates that there is a problem with the system. In addition, if the light begins to flash after the bulb check, it indicates that someone tried to use an invalid Key Fob 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 system.

Should this occur, have the vehicle serviced as soon as possible by an authorized dealer.


  • Do not make modifications or alterations to the immobilizer system. Modifications or alterations to the immobilization system may result in a loss of security protection.
  • The Sentry Key Immobilizer system is not compatible with some aftermarket remote starting systems.

    Use of these systems may result in vehicle starting problems and loss of security protection.

All of the Key Fobs provided with your new vehicle have been programmed to the vehicle electronics.

More about «Things to know before starting your vehicle»:

A word about your keys

Sentry key

Vehicle security alarm - if equipped

Illuminated entry

Remote keyless entry (RKE)

Remote starting system - if equipped

Door locks

Keyless enter-n-go



Occupant restraint systems

Engine break-in recommendations

Safety tips

Jeep Cherokee Owners Manual / Things to know before starting your vehicle / Sentry key

Jeep Cherokee Owners Manual


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