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SRDT

Motronic MP3.1 wiring diagram and more

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SRDT

As I said I have some documents about the Motronic MP3.1, mostly in French but worth the read.

You can probably use optical character recognition and automatic translation online to create english versions, I don't think my english is good enough for proofreading.

 

Due to the upload limit I had to find them on the internet again.

 

First the XU9J2 from the 405 and BX:

 

http://405sri.free.fr/Documentation/manuels_atelier_405/405__114-F-02_90_MOCIR_01_moteur_XU9J2_injection-allumage_bosch_motronic_MP3.1__controles_interventions_reglages.pdf

http://405sri.free.fr/Documentation/manuels_atelier_405/405__158-F-09_90_MOC_AI_01_moteur_XU9J2_injection-allumage_bosch_motronic_MP3.1__controles_interventions_reglages__additif.pdf

http://www.lacitroenbx.com/~gwen/divers/bx/NT_BX_01_101.pdf

 

Then the TU3FJ2, this one is really cool but a bit strange as it's way beyond what a mechanic needs to know to fix a car:

 

https://prepa205gti.files.wordpress.com/2014/01/bosch_motronic_mp3_1_ax_gti_institut_citroen.pdf

 

And some in English:

 

http://www.squadramoravia.com/manual/33/ignition/MP31.pdf

http://www.alfa145.com/upload/Alfa145Manual/Volume 3 - Section 2/Injection & Ignition Boxer - 1.6 - Motronic MP3.1.PDF

https://prepa205gti.files.wordpress.com/2014/01/bosch_motronic_mp3_1_toutes_marques.pdf

 

There is also the AFM delete mod from the 309 GTI16 Gr.A, too bad the special .bin file from this ecu is nowhere to be seen:

 

2096365587_MP3.1XU9J4Gr.A.thumb.jpg.9ed7377ebd2f4a5dcb64fa143476f35b.jpg

 

Speaking of .bin file does anyone have the ZX 1.9i one?

 

 

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Gavin Waddell

Cheers for that will make an interesting read.

 

just need to print out the pages.

 

tjanks Gavin 

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SRDT

The TU3FJ2 is using IAC, for those with the XU9J2 ecu you can refer to this PDF about the XU9JAZ ML1.3:

 

Bosch-Motronic-ML1.3.pdf

 

 

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DamirGTI

Wow , seems like we have a lot to read now !

 

Thanks for sharing !

 

About the ZX Volcane .bin file , me at least i cannot remember anyone ever posted one for ZX  , but there was recently .bin file for the XU9JAZ ECU if that's of any use to you ?

 

Anyways , best to search the forum via google (site:www.205gtidrivers.com) , it'll come up with better results/more precise ..

 

D

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SRDT

I have a ML1.3 XU9JAZ .bin, that's why I'm curious about the MP3.1 XU9JA .bin.

Looking at .bin files I have found some XU9J4 and XU9JAZ ML1.3 .bin that are really close, it seems that Peugeot used the same all purpose file before tuning it for each engine.

They have the same number of map at the same places so things like IAC, knock sensor, lambda or Dwell are there even if unused.

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welshpug

wiring diagrams have been posted on here a few times already for the MP3.1, from the zx and bx iirc, and a scan by a French member of a 106 diagram

 

very interesting that the gti16 got an Mp3.1 ecu as an allowed mod  :D  I do recall mention of a very early emerald ecu being used on 205 challenge cars, cant quite make out all the components shown there, was it intended as a plug in without changing the loom?

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SRDT

They probably had to keep the distributor but not the AFM.

If you have a ML4.1 the MP3.1 is indeed really close, maybe they made a MP3.2 mod for the late ML1.3 GTI16.

The components top to bottom:

 

Diagnostics

Injectors

Coil

Ignition module

Power

Crankshaft position sensor

Water temp sensor

Air temp sensor

TPS

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jackherer

I'd like to know what TPS they fitted, presumably they replaced a switch with a potentiometer?

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jackherer

Thanks, that's very interesting.

 

It talks about a potentiometer support (79021-02E) so I presume that is an adaptor of some sort and the potentiometer is not a direct fit.

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SRDT

The throttle body isn't stock either so maybe the potentiometer is simply the one used on the XU9J2, XU10J2 and TU3FJ2: 1628.L1

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jackherer

OK that makes sense, I didn't realise it used a different throttle body.

 

I was hoping there was a potentiometer that would fit directly onto the XU9J4 throttle body (and by extension the XU9JA as that uses the same switch.)

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