ECU Terminal 15

[wyshyvanuk]

This is kind of a modification of a previous post about ECU wiring. In an effort to install a relay to control an add on electric water pump, I apparently need to tap into "terminal 15" in the ECU. Does anyone know the location of this terminal 15? My inexperience with wiring issues has me way out of my depth here. Thanks for any help!!

[Clearancediver]

Google ... terminal 15 bmw.... it's power supply

[wyshyvanuk]

Yeah, I understand what it is, but I'm trying to identify where one is located in the ECU.
Thanks.

[t3ddftw]

Originally Posted by wyshyvanuk

Yeah, I understand what it is, but I'm trying to identify where one is located in the ECU.
Thanks.

Terminal 15 is easy to spot as it is a purple wire with a white stripe to it. Here's the wiring diagram for the Z4M DME: https://www.newtis.info/tisv2/a/en/e....2-cou/Z8TkuuA

-Ted

[wyshyvanuk]

Thank you, sir!!!

[filtercoffee]

t3ddftw, how did you know it's a purple wire with white stripe? (noob here, thanks for your patience )

[t3ddftw]

Originally Posted by filtercoffee

t3ddftw, how did you know it's a purple wire with white stripe? (noob here, thanks for your patience )

Actually, I guess I was wrong. It's green and purple. Generally, BMW sticks to a specific color code for the wire throughout the car, and for most E-series cars, Terminal 15 is White and Purple.

WDS tells you the wire color: https://bmwteka.com/wds/en/e85/2f1d8b27

You can see the 15<9 (Pin 1) is GN/VI which is the German abbreviation for Grun and Violet.

Thanks!
-Ted