4.1.1.1 Continuous continuity checking of the protective conductora. Connect the sample to the charging pile test system, and run it normally. During the charging process, the control guide circuit is disconnected, and the vehicle control device controls the charger to stop charging within 100ms. b. Connect the sample to the charging pile test system, and run it normally. During the charging process, short circuit between pilot wire and protective conductor, and the vehicle control device controls the charger to stop charging within 3s.