Chrysler 2004 PT Cruiser - Manual (Page 27)

To disarm the system:
Unlock a front door/liftgate using either the key or the
Keyless Entry Transmitter.
Starting the vehicle with a valid Sentry key will disarm
the system. A valid key is one that is programmed to that
particular vehicle. A valid key will disarm the system, an
invalid key will trigger the alarm.
Tamper Alert
If the horn sounds 3 times when you unlock a front door
using either a key or the Keyless Entry Transmitter, the
alarm has been activated. Check the vehicle for tamper-
ing.
Security System Manual Override
The system will not arm if you lock the doors using the
manual door lock plunger.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 27
2