I think I would have to cut the 5V wire from cpu to the boost pressure sensor and if I got 5V at the cpu I know the cpu is good same as disconnecting each sensor could go that way if the sensors were hard to get at
Great content bro had a similar issue in the Kombi t6 the problem was the EgR. And also where can I find that wiring diagram. It makes things so easy especially diagnosing this kind of fault
To verify if its ECU or a real short you can use your test light from battery + to the shorted 5v ref, if it lights up you have a sensor short revealing a real short to ground, if it doesn`t the ECU is at fault.
Good video Alan, I checked VW wiring diagram and no reference to B circuit, it must be an internal circuit within ecm! So best course of action is just disconnect any sensor you find! Cheers sandy
