Testing Outputs

[AVP]

Hi

i want to test the outputs on VEMS and although i follow the procedure correctly i cannot get any responce from the N80 or ISV valve, even though i know the ISV valve is working!

I have the ignition key ON, without running the engine
i go to outputs/assing output channels/ test mode ON

then i go to the 2 specific channels and tick the box to allow the ON/OFF button to be enabled. I click the button on or off and i get no responce no clicking no activity from either the ISV or the N80.


am i doing something wrong?

thanks
vas

[gunni]

do you have 12v on one side of the solenoid?

[AVP]

I don't know. I have the Audi cable tree and plugs connected as they would during operating conditions

[gunni]

What I mean is that some relays only get turned on at specific times , i.e engine speed for instance, so the relay that poweres that valve might not even be on.

Something to look for before assuming that there is no signal there.

[AVP]

i see,
i dont know that im afraid. i was under the impression that with this testing procedure, those relays should be bypassed by VEMS

[gunni]

How would that work?

the valve needs 12v from somewhere. If there is none there is nothing the ecu can do about it.

[AVP]

so if i know that the valve is working with giving it externally 12v, how can i test if vems is using the correct output to operate the valve?

i am not aware of there being any relay for the N80 valve (EVAP)

[gunni]

What I mean is that one side of the valve needs 12v
the other side gets the grounding signal from the ecu.

So without 12v it doesn´t matter what the ecu is doing you can´t measure it.