How to Replace and Reprogram Chrysler FCM with DRB III?


Replacing or reprogramming the Front Control Module (FCM)


Erroneous Actuation of Horns, Headlamps, and Parking Lamps while vehicle is parked

2001 – 2004 (RG) Chrysler Voyager (International Markets)
2001 – 2004 (RS) Town & Country/Caravan/Voyager

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).


1. Using a Scan Tool (DRBIII®) 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 DRB III select:
3. DRBIII Standalone
4. 1998 – 2005 Diagnostics
5. All
6. Body Interior
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.




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


Qty Part No. Description
1 04727079AF Module, Front Control, 2003 RS Vehicles
1 04727080AF Module, Front Control, 2003 RG Vehicles


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.



1. Before beginning the reprogramming procedure, remove any old flash reprogramming files from the DRB III  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 DRBIII® reboots to the MAIN MENU, proceed to
2. Open the hood, install a battery charger and verify battery state is above 12.5 volts.
3. Connect the DRBIII® 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
9. Disconnect the DRBIII® from TechCONNECT.
10. Connect the DRBIII® to the vehicle.
11. Download the flash from the DRBIII® to the vehicle. Using the DRBIII® select:
a. “Vehicle Flash”
b. Follow the directions on the DRBIII® 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.