http://forscan.org/home.html
有這段話在描述 說市面上太多 ELM327 假貨 造成大家以為 ELM327 沒法用來開隱藏
Important note: almost all of adapters sold under "ELM327" label are "clones" (use not original ELM327 chip). In past few years 80% of them are "bad" clones, and unfortunately this ratio grows. "Bad" clones are not fully compatible with original ELM327 and will not work with FORScan. FORScan uses service level protocols and requires adapters that are fully compatible with original ELM327. Other software that uses standard OBDII protocol usually work with these adapters, so people usually don't understand the problem. The problem is that service protocols are more complex than regular OBDII ones and this is why it is physically impossible to make FORScan work using these devices. We recommend to obtain either original white-label adapters listed above (Scantool OBDLink, ELS27), or look for ELM327 marked as "Ford Mazda FORScan" etc compatible - these are usually "good" clones equipped with HS/MS CAN switch. But "good" clones may have other problems (for example, USB adapters cannot work faster than on 38400 bps, CAN bus errors etc).
