Was going thru the Group Buy thread and realized that the scanner being offered is good for Thailand-assembled vehicles. So after some surfing, I found this: Best OBD2 Scanner – Reviews and Rankings | Bestcovery.

Here's what it says in the site:
Every new car today comes with ODB2 – a federally mandated on board diagnostics computer which is used for service related matters. OBD2-equipped cars have a distinctive port hidden somewhere in the passenger compartment, into which a diagnostic device is connected. When your car is running rough or the check engine light is illuminated, a ‘scan tool’ is often the first tool deployed to isolate the issue. While many auto parts stores will perform a scan for you either for free or for a nominal fee, nothing beats the convenience of having your own scan tool. Here are the best ODBII scanners to keep handy in case things ever go wrong.
If you're wondering where your particular vehicle's connector is, click here: CarMD.com. The section on 'Find My Car's Connector' is quite helpful.