OBD II or OBD2 (On-Board Diagnostic) is a computerised system that provides access to data from the engine control unit (ECU) and offers a valuable source of information when troubleshooting problems inside a vehicle. It ensures that the system is operating as designed or delivering what it is designed to do. If something is outside the prescribed operating conditions, an alert can be sent out, or other actions an be taken to bring the system back into balance.
In the mid 90’s, EPA amended the Clean Air Act to include the requirement that all vehicles built and sold in USA after January 1, 1996 to be to be equipped with OBD-II / OBD2 system. All petrol vehicles manufactured in Europe were required to be OBD-II compliant after January 1, 2001. Diesel vehicles were not required to be OBDII compliant until January 1, 2004. All vehicles manufactured in Australia and New Zealand were required to be OBD-II compliant after January 1, 2006. Some vehicles manufactured before this date are OBD-II compliant, but this varies greatly between manufacturers and models.
Here is what you need to do to find out if your vehicle is OBD2 compliant: Look for the 16 pins OBD2 connector under the steering wheel. However, some cars do have a D shape 16 pins plug but it does not have the ‘OBD-II’ sign. This means that the car does not have the OBD-II protocol. You may also consult your vehicle’s owner’s manual or contact your local dealer. However, be aware of the fact that many dealers do not know the difference between OBD1 and OBD2.
Please check the List of OBDII Compatible Cars In Australia
We recommend supporting a great Aussie company like Jaycar to purchase your OBDII Adapter. We use these adapters for all our testing and they are rock-solid. You can get very cheap adapters from Chin/Ebay but we found these adapters can be unreliable and so we DO NOT recommend them.