I have a 2009 Toyota Rav4 which has been having an intermittent problem with the ECU IG 1 fuse. Back in May the fuse had blown and I replaced it but it kept blowing as soon as I pushed the start button. I brought my car into a local mechanic who was able to prevent the fuse from blowing but wasn't sure exactly what fixed the problem. Now, 2 months later, I'm running into the same problem. I'm thinking there must be an electrical short somewhere. Any suggestions?