How to determine the MB Nec Key as 315 / 433 Mhz?

[autoenthu]

Hi experts,

I always have problem with these keys when programming. May be many others also.

How to find the Nec keys as 315 or 433 Mhz?

Thanks

[autoenthu]

Is it the key file which changes the frequency? or type of NEC chip? or the key board itself?

[54321]

To find out frequency something like this (http://www.aliexpress.com/item/Frequency-tester-can-test-Car-IR-infrared-remote-key-frequency-range-100-1000MHZ/651313583.html) maybe

[pianoman58]

The large black 2 solder pad chip (on the other side to the nec chip) on the edge of the pcb:

13.xxx = 433
9.xxx = 315

[autoenthu]

is it necessary that we use right frequency ? or if we use wrong frequency will the car start? only central lock does not work?

[Fallen]

Correct, car will start but radio remote will not work (IR remote will still work though).

[immomaniac]

my market has both 315 and 434 mhz. i really have tough time deciding which frequency keys for all key lost situation

Any tips which i am not aware to find out which frequency car uses??