I went to crank my 2009 is250 AWD and wouldn’t do anything. The lights worked wasn’t battery even tried having it jumped off. Took it to a local shop and they “think” it could be the ECU. While at the shop it cranked for them to pull in the shop but later on wouldn’t crank again. They checked all wiring going to engine computer, and wiring going to fuel pressure sensor and removed all grounds going to computer and engine and cleaned all connections and installed all grounds and checked all fuses and relays and reset engine computer. Any thoughts? Thanks in advance!

 

Has anyone checked the brake switch?

 

Nope. Is this something I can do on my own or the shop needs to do? Thanks!