VEMS Community Forum

Technical => Fuel Injection => Topic started by: Rak on November 17, 2015, 03:27:11 PM

Title: Flyback testing
Post by: Rak on November 17, 2015, 03:27:11 PM
Hi.

I have problem with idle, as i stated in topic about my car.

I couldn't find instructions how to measure tvs diode.
Can it be done with dmm?

Here is a picture of a scope view of injector wire between resistor and vems (circuit component order: relay-fuse-injector-resistor-vems).

(http://forums.offipalsta.com/picture.php?albumid=172&pictureid=184621)

I am wondering is the voltage spike too high? 48.3V
Title: Re: Flyback testing
Post by: MWfire on November 17, 2015, 03:30:38 PM
flyback diode is 30V+2*0.7V+resistance of diode. So normal is 14.4V+30V+2*0.7V=45.8V+resistance, so that voltage is normal.
Title: Re: Flyback testing
Post by: Rak on November 20, 2015, 04:35:19 PM
Of course :) Thank you.