2020 Kia E-Niro VESS/Reverse Chime defeat solution

Hey all! I just wired up the VESS momentary switch to my 2022 Niro EV EX and it works well. Thanks for all the info and the videos.

I'd like to have it off by default. I was thinking I could wire up a simple transistor + cap for a delayed circuit. To do that I need some constant voltage.

Had trouble reading the schematic. Would the brown wire give a constant voltage supply? And, what voltage? (I could check the voltage eventually when I crack it open again..)

I experimented with the switch: if I hold it down while the vehicle is turned on (circuit closed), VESS is enabled. If I let go of the momentary switch, it will disable.

So, I could have a transistor that is normally closed allow the circuit to start up closed for VESS, then when the capacitor accumulates enough, open the transistor for the duration of vehicle operation. This could be tapped alongside the switch. That way it would turn off VESS about 500ms after I turn on the car, but the switch would still operate normally.

Thoughts? Thanks for any info on a voltage line if you have it!

 

Sorry, I was referring to Pin 1 or Pin 8. Attaching image you posted long ago.

And I agree re: momentary switch. Seems like there's a latch circuit detecting change in signal voltage to toggle VESS. So my thinking was to have a delay circuit do that for me. Only thing holding back that idea is the need for a separate voltage line, since I cannot control the signal voltage without it.

 

Seems like it says "IBPM" or "IGPM"? Not sure what those mean. If there's perhaps another steady supply of voltage, that could work. I really don't want to resort to a 9V battery...