PAM MasterKeyIII MK3 key programmer is a good device to unlock PCF7941 in Chrysler remote keys and fobiks. Here is the tutorial on MKIII Chrysler M3N5WY783X key upload firmware.
Instruction:
Open back cover of Chrysler remote key
Remove remote key battery
Connect test clips with MK3 and remote key
Open MKII software
Select Utilities tab->Programmers->PCF7941 Key Firmware Downloader
Select firmware: M3N5WY783X (fob)-Chrysler/Jeep/Dodge, and press on key icon marked red circle picture below
Press OK
Remove test flips from remote key
Install the battery back to the remote
Place remote key on the MKIII main unit to test transponder
Press test transponder icon
MK3 will display remote type, ID data, encryption keyv
Test radio key
Open MK III software, Select Utilities tab->Radio Key Scanner
Select Key FCC ID: M3N5WY783X (fobik)-Chrysler/Jeep/Dodge
Click on Scan
MasterKey III will display radio data and information
