VDIAGTOOL V500. VDIAGTOOL V500 Electrical Circuit Tester Fuel Injector Test. ????VDIAGTOOL V500 ——Automotive Circuit Tester! 3m Extasion Cable. The VDIAGTOOL V500 circuit diagnostic kit can be used to check the injection status of injectors by using the probe tip to output different pulse signals to the injector.
