Ade,

think about this mythodicaly ok,

you have components, solenoids, ECU and wiring.

check voltages at the ECU, then components as you know what the voltages should be at various solenoids, correct??

i.e if the MAP fails, you have voltage readings to confirm this.

if the ECU fails, you have voltage readouts to confirm this.

if (and most likely!!!) the wiring fails, continuity, and voltage checks at the solenoids and components will again, confirm it dude!

ive had this many many times with split MAP pipes, MAP sensor fucked and most of all shitty engine bay wiring!!