ECM

[NyeTaylor03]

Hi,
I have a 2003 I35 infiniti. I was driving and i suddenly smelled a strong odor like an electric burning. Once I got home I couldnt re-start my car. I learned that the ecm burned out. I would like to know what may have caused this so that once i replace the computer i can avoid the new one getting burnt out as well. Thank you

[loystock]

Welcome to NICO.

Aside from obvious short circuit, check the battery and alternator cables. There are drivers (power transistors) inside the ECU for IACV and Electronic Suspension (front). A short circuit in those components can 'fry' the ECU.

[NyeTaylor03]

thank you very much for this information and taking the time to respond

[audtatious]

I would fully check out the electrical system before simply plugging in a new ECU in case it's an external source which caused it to fry. Don't want to have to order another one....