Find out how to Use ELM327 OBD-II OBD2 CAN USB Interface Diagnostic Tool    
    
ELM327 OBD-II OBD2 CAN USB Interface Diagnostic Tool is particularly very easy to make use of. Just turn your pc into a auto diagnostic system. This interface with software included is all you need. Works for many of cars immediately after 1996. It can read and clear all diagnostic trouble codes. Display all the live information of your automobile.    
    
ELM 327 Instructions:    
    
There are several software for running ELM327, now we're talking about software EasyobdII 2.2 version.    
    
1. Very first, Connect your laptop with your automobile and turn the key on or turn the engine to be running.    
    
two. The hardware are going to be detected and automatically installed, ready to use. Otherwise, you might want to use driver file to install it.    
    
3. If you ever use Windows Vista, only the software program EasyobdII 2.2 works with Vista. For rest operation method should not such troubles.    
    
4. In the initially try, you may have trouble and see screen like the following.    
    
There are 5 possibilities like com1, com2, ...com5.    
    
5. At this step, you'll need Go to Control Panel--> system --> Device manager -->Ports(Com&LPT) --> USB serial port(com?), to learn which com number you will need choose.    
    
6. If the above com number is com1, Restart program EasyobdII, choose COM port as com#1 at bottom line of program, and let the program detect automobile ECU.    
    
7. The program will generate information and shows on screen.    
    
8. Other thing to try: plug and unplug vag tacho and make sure connection is OK; or attempt a different usb port of your laptop.