the panic alarm just started going off on my 02 grand caravan today... when i unlock it with key it stops... then it goes off again in about 10 mins.... there is no key fob.... is there something i can do to alleviate this problem??????

 

Welcome to DF
Hope this helps.
OPERATION
When the Door Cylinder Lock Switch is turned either way using the door key cylinder, the BCM reads a direct message signal from the switch, via the Programmable Communication Interface (PCI) bus.

If turning the key cylinder once, toward the front of the vehicle (for either driver or passenger doors), this will:

Mechanically unlock the door lock.
Disarm the Vehicle Theft Security System (if equipped).
Turn on the Illuminated Entry (if equipped) for approximately 30 seconds.
If the key cylinder is turned to the unlock position (toward the front of vehicle) twice within two seconds, all the doors and liftgate will unlock (if equipped with the central locking feature).

To lock the vehicle using the door cylinder lock switch, turn the key cylinder toward the rear of the vehicle (either passenger or driver doors) once. This will lock the door that you are using the key on. If equipped with the central locking feature, this will lock all the other doors and liftgate. Furthermore, this will arm the vehicle theft security system and turn off the illuminated entry.

 

Here is a TSB to replace the front control module. SUBJECT:
Erroneous Actuation of Horns, Headlamps, and Parking Lamps while vehicle is parked
OVERVIEW:
This bulletin involves replacing or reprogramming the Front Control Module (FCM).
MODELS:
2001 - 2004 (RG) Chrysler Voyager (International Markets)
2001 - 2004 (RS) Town & Country/Caravan/Voyager
NOTE: This bulletin applies to vehicles NOT equipped with Security Alarm (sales
code LSA) built on or before October 20, 2003 (MDH 1020XX).
SYMPTOM/CONDITION:
While the vehicle is parked the customer may experience the horn sounding on and off,
flashing the headlamps and the parking lamps as if the security alarm was actuated. The
technician may find the vehicle is not equipped with Security Alarm system (sales code LSA).
DIAGNOSIS:
1. Using a Scan Tool (DRBIIIŽ) with the appropriate Diagnostic Procedures Manual, verify
all engine systems are functioning as designed. If DTCs are present record them on the
repair order and repair as necessary before proceeding further with this bulletin.
2. Determine the “Hardware Part #” of the FCM. Using the DRBIIIŽ select:
3. DRBIII Standalone
4. 1998 - 2005 Diagnostics
5. All
6. Body Interior
7. FCM/IPM
8. Module Display
9. Record the “Hardware Part #” on the repair order for later reference.
10. The condition is not easy to duplicate. If the customer describes the Symptom/Condition
and the vehicle is not equipped with Security Alarm system, perform the Repair
Procedure based on the table below. If the vehicle is equipped with Security Alarm
system, further diagnosis is necessary and this bulletin does not apply.
08-005-04 -2-
REPAIR PROCEDURE TABLE
Year Model Current FCM p/n Repair Procedure
2001 - 2002 RS 04869000AJ B
2003 RS 04727079AC B
2004 RS 04748479AC B
2003 RS 04727079AD
04727079AE
A
2001 - 2002 RG 04869001AJ B
2003 RG 04727080AC B
2004 RG 04727480AC B
2003 RG 04727080AD
04727080AE
A
PARTS REQUIRED:
Qty. Part No. Description
1 04727079AF Module, Front Control, 2003 RS Vehicles
1 04727080AF Module, Front Control, 2003 RG Vehicles
REPAIR PROCEDURE A:
Replace the Front Control Module. Refer to the service information available in
TechCONNECT or the appropriate service manual, Section 8E Electronic Control
Modules, Front Control Module, Removal and Installation.
REPAIR PROCEDURE B:
1. Before beginning the reprogramming procedure, remove any old flash reprogramming
files from the DRBIIIŽ memory. To clear the memory from the MAIN MENU:
a. Simultaneously press the “MORE” and “YES” keys.
b. A screen will appear requesting a “COLD BOOT”.
c. Follow the on screen instructions by selecting the “F4” key.
d. When the DRBIIIŽ reboots to the MAIN MENU, proceed to (STEP #2)
2. Open the hood, install a battery charger and verify battery state is above 12.5 volts.
3. Connect the DRBIIIŽ to TechCONNECT. Open TechTOOLS and verify that the "Device
Status: DRB Connected" message is in the upper right corner of the TechTOOLS screen.
4. Manually enter the VIN then TechTOOLS will populate the available updates.
5. Select the “FCM” calibration.
6. Select the “DRBIII” radio button which is next to the “Download/Update” button.
7. Select the “Download/Update” button.
8. Monitor the "Flash Download/Update Progress" window on the TechCONNECT
and follow the instructions on TechCONNECT. When the flash process
is complete proceed to (STEP #9)
9. Disconnect the DRBIIIŽ from TechCONNECT.
10. Connect the DRBIIIŽ to the vehicle.
11. Download the flash from the DRBIIIŽ to the vehicle. Using the DRBIIIŽ select:
a. “Vehicle Flash”
-3- 08-005-04
b. Follow the directions on the DRBIIIŽ screen.
NOTE: Due to the FCM programming procedure, a DTC may be set in other modules
(TCM, PCM, MIC, SKIM, etc.) within the vehicle, if so equipped. Some DTC’s may
cause the MIL to illuminate. Check all modules using “Module Scan”, record the
DTC’s, and erase these DTC’s prior to returning the vehicle to the customer. Erase
any DTC’s in the PCM only after all other modules have had their DTC’s erased.