E46 Main (DME) Relay / Switched Power Issue (EWS?)

[cmj]

I am planning to toggle the DME relay from the EMU Black. I've got constant power from the 9 pin plug that originally went to the DME but I need a switched source for EMU.. It seems as if the only switched wire are the Red/White/Yellow dot wires and those are powered from the DME relay.

Can someone give me some insight on this?

Thanks in advance,
Chris

[Jadzwin]

Use wire from ignition switch to power emu (switched +12V) and any of aux output to control main relay

[cmj]

Use wire from ignition switch to power emu (switched +12V) and any of aux output to control main relay

I have found a switched ignition source right next to the starter signal in the 8 pin connector. This should be sufficient to turn the ECU on.




ADDITIONAL QUESTION

The clutch switch signal that comes into the DME.. Is that a 'Ground to signal' switch? I'm wanting to use the clutch switch as my flat shift activation. Should I use an inverted switch input?

This is how I wired the EMU into the car. One deutsch 6P connector for power stuff and a 12p for DBW/can/brake/clutch and other chassis functions. Should make for a nice installation.

[magelius]

Use wire from ignition switch to power emu (switched +12V) and any of aux output to control main relay

I have found a switched ignition source right next to the starter signal in the 8 pin connector. This should be sufficient to turn the ECU on.

Which 8-pin connector? Is this signal originally connected to the DME and which pin?
I think that the original DME gets "wake up" signal from the EWS and it is digital data signal, so it can't be used for EMU. It is in 40-pin connector at pin number 33.

Maybe the most reliable way to wake up the EMU is to do like Jazdwin wrote. Unless you are 100% sure that the signal you found is always active with ignition on.

[magelius]

The clutch switch signal that comes into the DME.. Is that a 'Ground to signal' switch? I'm wanting to use the clutch switch as my flat shift activation. Should I use an inverted switch input?

Here are more info. It seems to be ground signal, so it should work with EMU.

[cmj]

The clutch switch signal that comes into the DME.. Is that a 'Ground to signal' switch? I'm wanting to use the clutch switch as my flat shift activation. Should I use an inverted switch input?

Here are more info. It seems to be ground signal, so it should work with EMU.

It turns out that this was an Auto car originally so the clutch switch isn't wired through.. Non issue for right now

I pulled my ignition switched source from S_OLD which is the voltage supply for the oil level sensor. From what I could see in the WDS this should remain powered at all times the ignition is on. Everything tested great when I plugged it all in, i'm just awaiting the motor to come in this week and then I can start patching in the motor harness to the EMU.