I’m working on my 21 year old daughters 2009 Toyota Camry se 3.5. It has the jbl factory sound system. It only has sound out of the dash and rear trunk speakers. The door speakers are not working at all. The sound is very weak no bass at all like maybe the amp is not working. It’s like the car only has tweeters for speakers. Anyone know what I could do to fix this? Any help would greatly be appreciated.