To use the Innova Advisor 5210, simply plug it into your vehicle’s OBD2 port. You can find instructions for specific functions in the user manual. If you are trying to read OBD2 fault codes, be sure your vehicle and the Innova CarScan Advisor are off before attaching the device. After securing the CarScan Advisor, turn your ignition on without starting the engine. The CarScan Advisor will automatically turn on and provide diagnostic information.