A dog that submissively urinates is urinating when he feels threatened. He may pee when he is being scolded, beaten, abused or seeing a stranger. Although that person may not actually be threatening the dog, but he (dog) perceives a threat. If this describes your dog’s problem, start by taking him to the veterinarian to rule out any physical problem. If your dog is a male, have him neutered.
Try to understand exactly what makes your dog feel threatened. Be aware of when this happens and what occurs that leads to submissive urination.