On a usa 02 model it is located under the plastic panel below the steering wheel, where do you live maybe it's different in your country, or stop by and ask your local dealer or shop they should be happy to help. Good luck
Thanks ronjohn, I already found the 20-pin OBD2 connector under the hood beside the fuse box and I manage to convert the 20-pin to 16-pin directly to my OBD scanner using 3 wires. I can read now the RPM and other data using my android phone. I found out I got low idle RPM (700~800) and when I turned on the A/C the reading just the same. Do you know what is the normal RPM when idle and with or without A/C?