V1 Keeping factory remote start

[Goblin Graber]

Has anyone with factory remote start kept that functioning? I still have the key fob/TPMS module, so I think it’s doable. The one thing I know for a fact is it needs a hood closed signal to work. There is no reference voltage at the connector...just ground, hood closed, and hood ajar. Is the BCM just looking for ground on pin B to think the hood is closed? If so I can ground that wire and give it a shot.

For what it’s worth I’m working on a base 08 automatic donor.

 

[jennam]

Looks like those go to ground.

 

[Goblin Graber]

That’s what I needed to see. It definitely switches between those two wires to ground for closed and ajar. Thank you. I’ll definitely ground the purple wire and go from there.

 

[ctuinstra]

The only other thing you might need to consider is the door open and close. I don’t know much about that side of it but I know others have wired up something to simulate the door opening and closing to kill the RAP.

 

[Goblin Graber]

I just went out and double checked my 09 Silverado that has similar wiring architecture and you can remote start with the doors open. I worked at a GM store for 10 years and as far as I know the only things that prevent remote starting are the hood open, or two remote start cycles without a key cycle. Maybe I’ll get lucky and it still works.

 

[ctuinstra]

I’ll bet it will.