Setting up fuel pump speed control using Subaru module

[ellisd1984]

I'm wanting to set up fuel pump pwm control using a Subaru speed control module.  I've double and triple checked all the wiring and verified the PWM signal coming from the link but nothing I seem to do makes any noticable difference to the speed of the pump, it just seems to run flat out all the time regardless of the hz setting, DC setting whether i set it to Hi/low nothing.  I've tried it on open loop pwm and the three speed subaru specific setting

[Adamw]

What aux are you using?  You might need a pull-up if using an injector drive.  Should be ok directly connected if using an aux or ign drive.

Settings below from our V11 test car works correctly.

 

[ellisd1984]

That looks like what I've got.  When testing a PWM output is there a way to adjust the DC on test?  all I can see is Hz  Is there anyway of testing the output to the pump to check the speed control is working?  Will there be a change in voltage or current?  i'm thinking up plugging a fan in temporarily to check it's actually doing as it should

 

https://www.dropbox.com/s/5oie0nori6d7swj/Screenshot 2021-04-27 at 05.56.17.png?dl=0

https://www.dropbox.com/s/oyqa353g4b56u5o/Screenshot 2021-04-27 at 05.54.33.png?dl=0

[Adamw]

In test mode the DC is always 50%.  

 

1 hour ago, ellisd1984 said:

Will there be a change in voltage or current?

At 50% DC the voltage on the aux pin would be approx half of the normal voltage when the aux is off.