Check every stinking fuse on this car with a tester. Do not look at it and make a judgment. These cars can do crazy things when a fuse blows. Try this before you spend $2000 on an ECU. My car blew the fuse for the alarm, and the stupid thing would not quit going off. I removed the battery and the alarm was still working. Finally I test a silly 10 amp fuse that looked fine and it was blown. Changed it and fixed everything from Door locks to the crazy alarm.