Magneti marelli idle stepper

[mads b (dk)]

Hi

I have a throttle body from a peugeot 1.8L XU engine and i would like to use the idle stepper.

on the connecter to the stepper the wires are name A-B-C-D do these names match vems idle stepper output A-B-C-D ?

Thanks Mads

[mads b (dk)]

https://onedrive.live.com/redir?resid=34C230F7EE9C6B96!655&authkey=!AHCegEPdmr1IwZg&v=3&ithint=photo%2cjpg

https://onedrive.live.com/redir?resid=34C230F7EE9C6B96!653&authkey=!ABr8nJ8COPwKdwE&v=3&ithint=photo%2cjpg

[mads b (dk)]

From this link I see that A-D and B-C but from what I have read on Internet I should be able to measure resistance between connectors to see which are together.

http://www.vems.hu/wiki/index.php?page=MembersPage%2FRallyeNLD%2FQuestions

[Sprocket]

It is fairly straight forward to set these up, as you can change the settings in VEMStune to get the correct polarity on each winding. Last one I did we wired them up ABCD to ABCD and then messed about with the settings until the stepper motor drove the desired direction.

[mads b (dk)]

This is how i have connected it.... havent had the time to test.

messurement tells me that A-D together and B-C together

Pin4 (A)   idle   1   a   coil1
Pin5 (C)   idle   3   c   coil2
Pin10 (B)   idle   4   d   coil1
Pin11 (D)   idle   2   b   coil2

[mads b (dk)]

I see now that im missing stepper driver chip and D47-D54

i have a the Chip and its a easy fit, i have some M016LV diodes (i think they where ment for injection outputs). Can i use these diodes ?

[mads b (dk)]

I have been looking into schematics and i see that vems 3.2-3.8 dont use D47-D54 it looks like they should work as flyback protection ?

in this link i see that someone say that the D45 can be changed to a simpel wire
http://www.vems.hu/wiki/index.php?page=GenBoard%2FBuildProcedures%2FStepper

[mads b (dk)]

I took the chance.... and it works  ;D