Hey im trying to get my emu black/pmu16 to controll my cwa200 water pump since i needed to remove the original mechanical waterpump. I know wiring is 1=12v 2=pwm signal 3=signal ground or linbus 4=ground. i have tried using h-bridge but it only give 12v at 100% in the pwm table and that starts the pump but it wont run full speed. i need to give it a wakeup pwm signal for 3sec and then controll it with pwm? would love to get help if some1 have this working on emu black 
kind regards // Eric
I’m also doing the same, although I’ve not tested it yet, I’m going to follow the PWM info from this
I have seen those and tried everything but cant get it to work😅 maybe im doing something wrong or my pump is trash (its a New one).
This is what ive tried but didn’t work for me so I will try put a pwm relay in between so the emu controll the relay or else my pump is broken😥
Then it could be the pump, Does pmu shows current draw? PWM relay will not help in this situation as it should work directly.
It draws about 0,9a or something but if i put it into 100 on pwm it draws about 2-3a
It could draw 2-3A if there is no water into pump inlet. Make sure there is no air bubble,
Which output are you using for the PWM signal? If you are using an AUX or injector output (except AUX4), it will require a pull-up resistor. A good idea is to use an H-bridge output instead.
Best regards,
I got mine to work when i bought a old BMW one from the junkyard😅 but i controll mine from the Ecu like the other onces say they did
I have just bought a EMU Classic for my straight 6 EFI conversion and I also have a Pierburg CWA200 that I was hoping to be able to control using this ECU. I just joined the forum and this looks extremely promising.
Pierburg PWM Water Pump connection.pdf (74.5 KB)
here will be connection manual. for settings look above.