Final answer:
A vehicle can be placed out of service for serious safety violations, such as having an intoxicated driver or defects in the brake system. An ELD malfunction may result in fines but not typically an out-of-service status.
Step-by-step explanation:
When it comes to commercial vehicles, there are strict regulations in place to ensure the safety of both the drivers and the public. A vehicle can indeed be placed out of service for various reasons, including issues with the brake system or for having an intoxicated driver. However, a malfunctioning Electronic Logging Device (ELD) alone would not typically place a vehicle out of service, though it could lead to fines or penalties. Instead, driver intoxication and brake system defects are serious safety violations that can instantly compel a vehicle to be taken off the road.