The whole design will be such that a single electrical fault can't make it fail. It probably has at least 3 channels. Probably won't even allow you to start th

The whole design will be such that a single electrical fault can't make it fail. It probably has at least 3 channels. Probably won't even allow you to start the car if one of them is faulty. This kind of thing will almost certainly be designed to comply with ISO 26262.