Multiecuscan

Hi everyone.
I've bought this elm 327 and it doesnt read the ecu in my car.
Anyone knows how to fix it or whats the problem?
Thanks.

Hi. Here is a pic of the elm 327 mini opened
Thanks for any help.

Discussed many times. Read and google.
Look for a 120 ohm resistor between 6 and 14 pins, remove, happy.