tcy42

Hi all,

I put an incorrect battery into my 09 es350 which turned out to be opposite polarity. Joy. After browsing other posts, I went through and replaced all faulty fuses I could find including the fuseable link. I also tested my relays in the fuse box. I was able to get the car from totally dead to cranking with dash and electronics functioning, but I can’t get it to start. I tested my ignition coils for spark and I am getting spark. This makes me think the next frontier is fuel issues. I tried unplugging the fuel pressure sensor, but still just cranks with no start. Only code thrown is for a coolant temperature sensor, which was there before the battery incident. Tried using the key/fob unlock combo to see if it was immobilizer. Did nothing. Dash says check vsc. Not sure where to poke at next before tapping out and ordering a diagnostic. Any suggestions would be great.

LeX2K

You probably didn't find all the blown fuses this will give you some indication where they all are
https://www.japan-parts.eu/lexus/us/...lay-computer/2

tcy42

I’ve triple checked fuses in engine bay and driver side compartment, but doesn’t hurt to check again. Will do.

LeX2K

Usually EFI main, EFI2 and 3 if there is one blow.

ESh

EFI fuses may be the problem. Also, check the fuel pump relay.