Author Topic: Flyback testing  (Read 4722 times)

Offline Rak

  • Jr. Member
  • **
  • Posts: 24
  • BHP: 0
Flyback testing
« 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).



I am wondering is the voltage spike too high? 48.3V
V3.3 1652
FW 1.2.38

Offline MWfire

  • Hero Member
  • *****
  • Posts: 721
  • BHP: 35
Re: Flyback testing
« Reply #1 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.

Offline Rak

  • Jr. Member
  • **
  • Posts: 24
  • BHP: 0
Re: Flyback testing
« Reply #2 on: November 20, 2015, 04:35:19 pm »
Of course :) Thank you.

V3.3 1652
FW 1.2.38