Engine Kill Switch

SeeThruHead · 01-21-2021, 12:39 PM

Quote:

Originally Posted by JARblue

It seems to me that Elmo was just giving him some thoughts based on the context of the build goals

Yeah for sure. I did think it's was a little humorous that you could perceive it as:

Hey guys how can I wire in my battery isolator?

1: remove your factory ecu
2: spend 6k on an ECU and PDM
3: rewire your car

I'm also interested in aftermarket ECU and PDM
Though I think you would still use a standalone battery isolator anyway, just instead of cutting power to the ECU completely it would send a signal to the stand-alone to trigger is shutdown.

The one in that video sends signals to ECU over CANBUS and i think it works with motec. So I don't think that adding this isolator precludes or is redundant if he wanted to swithc to an aftermarket ECU/PDM or combo unit.

But I don't know the capabilities of all the PDMs so maybe some have that built in. /shrug

Wigjiggy · 01-21-2021, 10:35 PM

Yeah. My immediate goal is to spend an incremental $1.50 on some 12V wire to add a killswitch for safety. But I can envision a standalone ECU in the future. One step at a time. Thanks guys.

Wigjiggy · 01-21-2021, 10:42 PM

Quote:

Originally Posted by SeeThruHead

So for a racing application, where you need both internal and external kill switches. In case of fire / you are incapacitated / you have a crash. Can you hook up a physical button on your dash / exterior panel to kill the engine via ecutek? If it's not easy to kill in a panic then it's not really very useful IMO (for this application)

I’m all wired up with internal and external batter isolation already. Just need to get the engine kill wiring part figured out.

SeeThruHead · 01-21-2021, 10:57 PM

Quote:

Originally Posted by Wigjiggy

I’m all wired up with internal and external batter isolation already. Just need to get the engine kill wiring part figured out.

Yep I just meant I'm not sure that ecutek can receive a signal via the kill switch like some other ECU can. You may have to cut the ecu power directly. Which i think should be fine, I'm not sure what pin it is but you could check yourself by disconnecting 12v leads to the ECU maybe. I recently got a very sharp probe set my my multimeter so I could poke the wires to figure out what is what.

I'm sure there's also wiring diagrams around for what leads are power for the ECU tho. You'd want to replace that lead with the lead from your cartek if i'm reading it right.

EDIT: So i'm going to install one of these myself and am looking into it more

suggest to me you don't want to cut power to the ECM entirely as that will wipe it's memory.

I think you may have to go with

pin 47

please report back with how the install goes I'd love some pictures of how you end up connecting it.

Wigjiggy · 01-22-2021, 09:53 PM

Quote:

Originally Posted by SeeThruHead

Yep I just meant I'm not sure that ecutek can receive a signal via the kill switch like some other ECU can. You may have to cut the ecu power directly. Which i think should be fine, I'm not sure what pin it is but you could check yourself by disconnecting 12v leads to the ECU maybe. I recently got a very sharp probe set my my multimeter so I could poke the wires to figure out what is what.

I'm sure there's also wiring diagrams around for what leads are power for the ECU tho. You'd want to replace that lead with the lead from your cartek if i'm reading it right.

EDIT: So i'm going to install one of these myself and am looking into it more

suggest to me you don't want to cut power to the ECM entirely as that will wipe it's memory.

I think you may have to go with

pin 47

please report back with how the install goes I'd love some pictures of how you end up connecting it.

Thank you! Awesome. At sounds like a good pathe to head down. I’ll report back out.

01-21-2021, 10:35 PM	#17 (permalink)
Wigjiggy Base Member Join Date: Jan 2019 Location: Florida Posts: 127 Drives: 2013 370Z Rep Power: 6	Yeah. My immediate goal is to spend an incremental $1.50 on some 12V wire to add a killswitch for safety. But I can envision a standalone ECU in the future. One step at a time. Thanks guys. Rusty and Elmo370z like this.

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