Right, Burger motorsport device JB4 ....
There are 2 basic components ... software code , what I have no clue and probably some art of spoofing data ...
And a hardware part ... that in front of my eyes ... and:
I literally see missing components, no blocking capacitors
PCB design upside down , square pin 1 on PCB not as on chip
mess with positive and negative label
traces going nowhere
6 channels DACs in total - for 2 MAF output
can bus receiver with differential input, don't using a twisted pair
why using DB-25 , and only a few pins , do not parallel it for reliability .
socked MCU ?
plastic case not much water resistance, at least need conformal coating ....
Then ... there is no even basic protection for input\output signals ports , crowbar zener at least ... DAC no buffered ... Vref == Vsuppl without even attempt to clean it ...
Why it cost so much and designed literally as a prototype ... Like a basic proof of concept not a further ...
I use to fix some radio units for my friend service mechanic, 2-3 cases , I do remember a total shielding , and a a serious filtering where radio, admitting it analog ... Automotive power full of noises ...
Forgot to say ... to hook bluetooth they use a screw needle to attach on +5v wire .. ; as device used , it already traces of oxidation on some pin's connector, ( white thingi) ...