How to hot wire the Yaris

[CTScott]

Originally Posted by Nebarnix

Ok, that's straight forward enough. In order to keep the ACC (mostly A/C!) on I am assuming that the 12V needs to stay connected to the ignition 1 and 2 wires? Or is that what the ACC wire is for (is it even possible to start the car without accessory power on?) Thanks for your help!

Yes, IG1 and IG2 stay at +12 during cranking.

Acc is a separate wire. Acc should be off during cranking (the Yaris has an ACC cut circuit that does that while it is cranking).

[Nebarnix]

Originally Posted by CTScott

Yes, IG1 and IG2 stay at +12 during cranking.

Acc is a separate wire. Acc should be off during cranking (the Yaris has an ACC cut circuit that does that while it is cranking).

Thanks!

That sure is a curious way to rig things up with three wires. Security to make it more difficult to hotwire? Hopefully the starter current isn't passing through those wires. I'd like to use these 30A power transistors I have laying around for the control.

You'll have to excuse me, I'm not much of a car person so some of these things which might be tribal knowledge escape me :)

[CTScott]

Originally Posted by Nebarnix

Thanks!

That sure is a curious way to rig things up with three wires. Security to make it more difficult to hotwire? Hopefully the starter current isn't passing through those wires. I'd like to use these 30A power transistors I have laying around for the control.

You'll have to excuse me, I'm not much of a car person so some of these things which might be tribal knowledge escape me :)

Everything is low current at the switch. The starter, ignition and accessory wires all switch power to the coil of relays.

[Nebarnix]

Originally Posted by CTScott

Everything is low current at the switch. The starter, ignition and accessory wires all switch power to the coil of relays.

Thanks this is great. Interesting question though. How to sense when the key is turned on so that the lines can be dropped -- otherwise, you can't turn off the car because the remote start system is keeping them high!

It might be possible to interface with the speed sensor, break sensor, or cruise control clutch switch. If anyone can think of an easier way (maybe what the commercial units are using) it would be helpful!

[CTScott]

Originally Posted by Nebarnix

Thanks this is great. Interesting question though. How to sense when the key is turned on so that the lines can be dropped -- otherwise, you can't turn off the car because the remote start system is keeping them high!

It might be possible to interface with the speed sensor, break sensor, or cruise control clutch switch. If anyone can think of an easier way (maybe what the commercial units are using) it would be helpful!

You can monitor the yellow wire on 2 pin connector on the side of the keyswitch assembly. It is the key sense wire and it goes to ground when the key is inserted.

Remote starters actually watch the brake to turn off. You have to turn the key to the one position before pressing the brake, otherwise the car shuts off. The brake is also the safety, as pressing it immediately kills the running car.

[Nebarnix]

Originally Posted by CTScott

You can monitor the yellow wire on 2 pin connector on the side of the keyswitch assembly. It is the key sense wire and it goes to ground when the key is inserted.

Remote starters actually watch the brake to turn off. You have to turn the key to the one position before pressing the brake, otherwise the car shuts off. The brake is also the safety, as pressing it immediately kills the running car.

Sorry to keep bugging you and thank you for the information. Its perfect. I have one last question. On the DIY remote start wiring guide, the brake switching is listed as being on top of the brake pedal. Is that underneath the car or by the pedals?

[CTScott]

Originally Posted by Nebarnix

Sorry to keep bugging you and thank you for the information. Its perfect. I have one last question. On the DIY remote start wiring guide, the brake switching is listed as being on top of the brake pedal. Is that underneath the car or by the pedals?

By the pedals. Right at the top of the brake pedal.