GenBoard/Manual/PfetFlybackTesting (2019-02-03 10:11:38)

While

Tests before ECU powerup, retest after ANY change around the injectors or supply/GND:

With ECM connected, but output load (solenoid) NOT, measure the flyback integrity with DVM at the solenoid connector.

Low voltage flyback (almost always used, eg. for +4 PFETs) measures appr. 500..1500mV in DVM diode mode (with DVM+ red probe at GND). Very quick test, touch each PFET high-side switch output pin to verify, take note.

Test flyback path integrity for every high-side and low-side output that will (or might ever) be connected.


See also: