Why can't you step on the accelerator to charge the battery?

This is the case that the whole vehicle is not electrified.

Nothing more than the following reasons:

1, the main power switch is not turned on. This switch is usually in the cockpit. It will cut off all the low-voltage power supply of the whole car. You just need to open it.

2, the small battery is seriously short of electricity. At this time, just charge the small battery or use another car to supply power to it;

3. If the connection between the positive and negative electrodes of the small battery is poor, or if a wire harness falls, you can pull it by hand to check.

In addition, when you charge the car, you charge the vehicle power battery instead of directly charging the small battery. Generally speaking, after starting the car, the power battery will charge the small battery through DCDC. Of course, the relay of the power battery needs a small battery to start, so there is no way to start the relay of the power battery when the battery is dead.