： XTOOL D9 Pro is a bi-directional scan tool with ECU codding ,allows you to receive information to and from the vehicle’s onboard computer and can send commands to the vehicle ECU to perform active tests without using the vehicle's controls, like A/C Clutch on/off, Fuel Injectors, (Cycling) ABS Pump Motor, window, door, sunroof, etc. That’s helpful for DIY mechanics, speeding up the troubleshooting process when it’s time to make repairs.