Jeep Grand Cherokee 2020 Owner's Manual page 25

The system uses a key fob, keyless push button
ignition and a Radio Frequency (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 if an invalid key fob is used to start and
operate the vehicle. The system will shut the
engine off in two seconds if an invalid key fob is
used to start the engine.
After placing the ignition switch in 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 electronics. In
addition, if the light begins to flash after the
bulb check, it indicates that someone used 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 electronics. Should this occur,
have the vehicle serviced as soon as possible by
an authorized dealer.
CAUTION!
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.
Key Programming
Key fob programming is performed at an
authorized dealer.
Replacement Keys
NOTE:
Only key fobs that are programmed to the
vehicle electronics can be used to start and
operate the vehicle. Once a key fob is
programmed to a vehicle, it cannot be
programmed to any other vehicle.
GETTING TO KNOW YOUR VEHICLE
CAUTION!
Always remove the key fobs from the

vehicle and lock all doors when leaving the
vehicle unattended.
For vehicles equipped with Keyless

Enter-N-Go — Ignition, always remember to
place the ignition in the OFF position.
NOTE:
Duplication of key fobs may be performed at an
authorized dealer. This procedure consists of
programming a blank key fob to the vehicle
electronics. A blank key fob is one that has
never been programmed.
When having the Sentry Key Immobilizer system
serviced, bring all vehicle keys with you to an
authorized dealer.
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