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What gets changed in the ECU when a car is flashed?
Is the ECU completely overwritten, or just specific data structures within the ECU modified? What structures?
To what extent can flash tunes insert their own programmatic logic into the ECU?
Do companies like APR, Unitronic, etc. reverse engineer the ECU to develop their tunes, or is this stuff documented somewhere?
I don't have any practical reason for asking this. I'm just curious.
Has anyone eavesdropped on what a flash-at-home tune actually sends to the car?
Edit: I know that tunes change boost, timing, fueling parameters, etc. I'm more interested in the "how"
Is the ECU completely overwritten, or just specific data structures within the ECU modified? What structures?
To what extent can flash tunes insert their own programmatic logic into the ECU?
Do companies like APR, Unitronic, etc. reverse engineer the ECU to develop their tunes, or is this stuff documented somewhere?
I don't have any practical reason for asking this. I'm just curious.
Has anyone eavesdropped on what a flash-at-home tune actually sends to the car?
Edit: I know that tunes change boost, timing, fueling parameters, etc. I'm more interested in the "how"
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