Vehicles don't normally check morale for any reason, whether they are clanking great behemoths or arrow-quick attack craft. It is assumed that in all cases the vehicle's crew has unshakeable faith in both their vehicle and you as their supreme commander (as is often the case with vehicle crews). In special circumstances you might want to introduce special rules for inexperienced crews, tanks being driven off by penetrating or glancing hits and so on.
Vehicle Morale
Source: Core Rulebook 3E, p. 91
Vehicles never check morale for any reason, on the assumption that their crews have unshakeable faith in their machine and their commander.