| 摘要 |
<p>A control device determines that a system relay for precharging is welded when, after generation of a signal at the H level upon starting of a vehicle system to turn on only a cathode-side system relay, a precharge current is at least a reference value. When it is determined that the system relay for precharging is welded, the control device immediately turns off the cathode-side system relay without determining welding of cathode-side and anode-side system relays and performs discharging of a capacitor. In this situation, the control device determines welding of the cathode-side system relay based on a voltage between both ends of the capacitor. When it is determined that the system relay for precharging is not welded, welding of the cathode-side and anode-side system relays is determined upon termination of the vehicle system.</p> |
