Motronic electrical diagram

[Porscheke]

Hello

Can anybody here help me?

I'm looking for the electrical (wiring) diagrams of a 964 Motronic

All info that I have on the Motronic:

0 261 200 473

964.618.124.02

911-MW-DZ-01

Hope to hear soon

[Loren]

:welcome:

Model and year of your car please?

[Porscheke]

Hi Loren

It's a 964 coupe from '91

[Loren]

MY91_DME_Engine.pdf

[Porscheke]

Hello Loren

Thanks for the reply, but unfortunally it's not what i'm looking for.

The diagram is a global schematic from the Porsche manual (volume 7)

What i'm looking for is the electrical drawings of the Motronic itselfs.

My car won't start and we suspect that we have a bad/ damaged Motronic (unit under seat)

Hope you have this diagram

[Loren]

Hello Loren

Thanks for the reply, but unfortunally it's not what i'm looking for.

The diagram is a global schematic from the Porsche manual (volume 7)

What i'm looking for is the electrical drawings of the Motronic itselfs.

My car won't start and we suspect that we have a bad/ damaged Motronic (unit under seat)

Hope you have this diagram

Porsche (Bosch) does not publish those since they consider DMEs as FRUs (Field Replacement Units).

Porsche does sell rebuilt exchange DMEs for your model year.

[Porscheke]

Hi Loren

I had contact already with Bosch so they told me that they didn't release it :angry:

My friend is a real electronic freak and told me , get the diagrams and I will repair that unit !! (because it's not "state of the art" , my friends opiniun)

So I guess I have to buy a new unit :unsure:

[Richard Hamilton]

These are the schematics for the 1988 0 261 200 075. I don't know how they differ from 0 261 200 473, but hopefully they might be of some use.

ML31TAU.pdf

ML31TDU.pdf

[Porscheke]

Hello Richard

Thanks for the files

Altough I've done some more tests

Removed the plug from the motronic and measured some points inside this plug

First of all measured all grounding points:

2: OK

14: OK

19: OK

24: OK

Then I measured the 12V terminals:

18: OK (should be continuos 12V)

37: NOK!!!! here should be 12V after turning the start switch!

Done some further research and it looks like the alarm module (under passenger seat) is blocking the whole thing??

Done some tips a had from other lock/ unlock/ lock/ unlock.... the doors for resetting the alarm module but no good...

So I think my alarm module is the bad guy :angry:

Is there a way to solve this??

Restting the module, make a bridge between some connection,...

Any help would be great

Hope to hear soon

Regards

Porscheke

Edited September 27, 2009 by Porscheke

[Porscheke]

Anyone?