DTAForum.com - a forum for the DTA ECU

Are you using a relay from in the car?

It sounds like you've connected to a cross over relay, which powers things like wipers/radio/etc, and these are turned off when cranking to ensure the starter motor gets as much power as possible.

Nope
I use a separate relay...i feed 85 86 form 12v key switch position 1 and 30 87 from12v battery terminal

But when i crank key switch position 2 12v feed from key switch stops so ecu turns off

https://pasteboard.co/ISI3buu.jpg

Where are the electrical loads sourced from? I'd suggest the ECU relay should source from position #15 as this seems to be connected at key position 1 and 2?

katana wrote:https://pasteboard.co/ISI3buu.jpg

Where are the electrical loads sourced from? I'd suggest the ECU relay should source from position #15 as this seems to be connected at key position 1 and 2?

That's what I was talking about.
I suspect you've used position X for the ECU, which is for the cross over items.
You need to be on pin 15.

I agree but thats the problem...there is no wire or pin there to connect the relay

So as mentioned previously get the correct switch or just add a starter button.

i dont know how i should wire a dpdt switch...if you can make a sketch it will helpful

is this start button connection/modification right ?

https://pasteboard.co/IT7gdaU.jpg

the start button will cut the ground at the low side of relay...

If you have decided to buy a new switch, the example I showed earlier you would wire as follows.
12v to pins 1 and 4
Dta via relay to pin 5
Starter to pin 2

I cant make out what you are trying to show there just put a momentary 12v onto the lead to the starter, so long as it can pass 5A should be fine