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View Full Version : Precode a blank PCF7944AT


demos70
17th June, 2011, 05:12 AM
Hi, just purchased some of these, is there any way to write to them some variables to make them recognized as a transponder?
I'd like to be able to write the 4 byte ID, 6 byte factory-default ISK Hi and Low, and the 4 byte "transponder memory configuration+password", and finally the remote control default bytes (ISK hi,Low + remote pass"

Any programmer/writer/device that can do this?
obdmaster
17th June, 2011, 09:40 AM
when solder them onto a circuit board they will be recognised as an id:46 (such as renault card) to precode them u will need zed bull or other tool.

Original zed bull can precode cards and keys for renault.

Clone can only precode keys . When soldered onto circuit board.
demos70
18th June, 2011, 01:19 AM
I"m soldering them in BMWSmart RemoteKey board.
They aren't recognized as anything because they lack a chip ID, the 4 byte IDE...as well as other bytes. Can ZedBull do such a task for these keys (give the chip a 4 byte ID)?
obdmaster
18th June, 2011, 09:13 PM
No idea m8, bmw smart keys are a funny thing because as u know from bmw dealer they come working for the car it was ordered for
Room
18th June, 2011, 09:53 PM
Hi,

PCF7941, PCF7942, PCF7943, PCF7944 are Security Transponder and RISC Controller (STARC 2XLite).
Remote control will never work on blank ones, because special soft must be loaded at STARC.
Especially for BMW, which is not used standard software.

Do not purchase the blank ones if you need remote control working.

Trasponder usually works correctly, but there are instances where ID is all FF or all 55 or not read at all.
These devices are not configured and need special equipment from Phillips to make it work properly.

Only blank PCF7946 are always working properly.

These are my personal observations.
demos70
18th June, 2011, 11:42 PM
Looks like the ones I bought aren't configured because ID is not read at all.

What's the device that writes to these chips. I already have blank keys so I was thinking if I can clone the PCF7945 or 7944 from the blank key to the blank chips that I have...So if Philips sells some writer /reader for their transponders that would be great.