Show your ECU connectors

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johu
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Show your ECU connectors

Post by johu »

As you may know from my project threads I like to reuse the existing ECU enclosure, connector and wiring loom for VCU tasks.

I noticed that the Audi and Touran use the identical Bosch 154 way connector (https://www.tuningtechnology.net/ecu-he ... -connector). Pin mapping seems to be all over the place though, even between variants of the Audi A2: https://openinverter.org/wiki/Audi_A2_Conversion
grafik.png
Talked to Damien about this and we were wondering how common that Bosch connector is and whether it might be worthwhile porting ZombieVerter to it.

Can you post some pictures of your cars stock ECU, better still with pin mapping?
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Re: Show your ECU connectors

Post by Ev8 »

As my daily job I work on a lot of vw, Audis, this ecu connection is common on most vw/Audi/seat/Skoda stuff around 2004 onward mostly found on stuff with the Bosch edc17 family and Siemens vdo 5wp4 of ecu but I think there are some others that share the same connector, can’t think what from memory, but yes pin mapping does vary a lot
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Re: Show your ECU connectors

Post by Mitchy »

Also used on some Korean cars, either the full plug, or just the smaller 60 pin, with the 94 pin left pin-less

The later Porsche sdi3+ ECUs use a similar plug, although slightly different layout (Still 154 pins, but large pins are in different places with a 58/96 pin plug layout)
That version is also used on the Ford Focus 2016+
I think porting ZombieVerter is worthwhile. I'm actually half done porting it to the 154 pin Porsche/Ford connector, using a ecu case from the Focus.

One thing which we should consider is trying to align hardware with RusEFI, They're also opensource, use a similar architecture (even better if we eventually port to the STM32F4 variant)
The Hellen project seems flexible enough to use as a easy way to port VCUs to these other connectors.
(Admittedly the HW is likely our only common point, I doubt we'll get to a point where we'd have SW configuration/tuning requirements like an ICE ecu.)

*Look at the Hellen 154 pin ECU project here: https://github.com/rusefi/rusefi/wiki/H ... 54-Hyundai
Mobert
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Re: Show your ECU connectors

Post by Mobert »

Hello
I bought the vw version of this connector header here:

https://www.mouser.at/ProductDetail/571-284617-1

and the connector housing here:

https://de.aliexpress.com/item/40012459 ... pt=glo2deu

I so made a kicad footprint but have not tested this yet.
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Re: Show your ECU connectors

Post by johu »

Very nice, for what it is it is actually quite cheap. Ever found the housing?

I wonder how to deal with variation in pin mapping. Maybe with an extra connector board that routes function X to pin Y. Could use various 2x40 pin .1in pin headers that you can either jump over with jumper wires or said custom PCB
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Re: Show your ECU connectors

Post by Mitchy »

Would the best path forward to be to condense the VCU into a footprint that can be just copy-paste into a PCB design for each connector/enclosure type?
Ultimately with that many pins available, it's easy enough to add a few SPI IO chips and extend the IO to whatever space isn't used by the base VCU footprint. Likely out of the base scope, but nice to make what we know works as small as possible; leaves room for customization later.

The jumper board is a good option. Easy to make a 4 layer configuration board, keeping the footprint small lets us make multiples for whatever pin arrangement is common.
The other option is to just settle on a pinout, and just have each application re-pin their connectors... These connectors are super easy to rearrange.

For the enclosure, Aliexpress has some options: https://www.aliexpress.com/item/4000916537773.html

I'd suggest getting most of the VCU design on a 10cm * 10cm footprint, while also segregating the Toyota Comms stuff, it'll be nice to unify the design to both a general purpose VCU and allowing the IO used for the those functions to be also used for more conventional purposes.

Sticking to the base 10x10 footprint also allows us to use the cheap JLCPCB assembly service and using a enclosure such as this: https://www.aliexpress.com/item/32839361268.html

Sorry if I've fragmented the design purpose in my suggestions; Basically a small footprint modular approach will let those who want to use the base VCU project to customize the design to fit whatever footprint works best.
I think there's a market for a Sub $100 VCU design
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Re: Show your ECU connectors

Post by Mobert »

I intend to use the original housing from a second ECU I bought on ebay.
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Re: Show your ECU connectors

Post by crasbe »

ECUs? Yeah I got me some of those... :D

Volvo XC70 I:
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BMW E46 320d (BMS46):
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Streber42 and I did some research on the BMW E46 ECUs and the pinout is wildly different, even though they come in similar (or identical) cases.


Volvo V70 I:
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Volvo 850 (Fenix 4.2):
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