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ECU hacking -> 16bit Denso 68HC916 based ECUs with BDM -> A better way to access the BDM port
Post Info TOPIC: A better way to access the BDM port
RidgeRacer


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A better way to access the BDM port
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I think I may have stumbled on a better way to modify the ECUs to access the BDM port.

Despite all the wonderful things you can do with a fully programmable ECU it seems the majority of people I talk with just want the RPM limiter modified and never plan to reprogram it themselves afterward. They want it reprogrammed and sealed back up. I guess you can lead a horse to water but you can't make it do its own programming smile

So I thought why do the full notch and install the plug if all you need is to program it once. So I just cut a small slot on the bottom over the connector.

busa002.jpg


I just solder some temporary wires on the connector, reprogram it, remove the wires, and seal it back up. Of course it occurred to me that I could cut such a slot on the other side too, insert the plug header into it and solder it in. Then instead of a chewing a great big bite out of the back of the ECU you would have a coin slot like opening in the top of the ECU you would slide the programming plug into.

I think it would be a much cleaner, less 'scary' mod and frankly a lot less work for me. It just requires you really follow the old carpenter's rule: Measure twice, cut once.

busa004.jpg

I'll try to do an updated modification manual in the next couple of weeks with some good mechanical drawings and good measurements for all the 16bit Busa and ZX-12 models.

-- Edited by RidgeRacer at 19:09, 2008-01-26

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PetriK


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This is excellent - much less scary. I have also thought of putting silicone or hot glue to cover the exposed PCB. Looking forward to see the instructions soon...

But to the other point - do you know any good source for the harness connectors ? With individual pins like this there is always a risk for misconnecting those...

Either pins only or hopefully full connectors ?


harness_connector_structure.jpgharness_connector_push_to_open.jpg

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RidgeRacer


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The short answer is no.

I have tried for over a year to answer that question and spent hours and hours scouring the net. I've had all kinds of people give me tips that didn't pan out. I even bought a wire harness repair assortment parts kit because someone told me some of the pins fit these connectors only to find out none of them did. I've been told you can only get them in 10,000 piece lots, etc.

So I've given up on finding them from the manufacturer and resorted to recycling; buying wire harnesses on eBay for the connectors.

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Stocky


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The connectors in the picture (Early GSXR , Busa etc) are the same as the Motec M800 ECU connector.

You can buy the plugs and pins from Motec in small amounts .

They are not cheap but not stupid expensive either.

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RidgeRacer


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I looked at the catalog here and on page 67 they do appear to be the same plug, listed as the

65045 M800 26 PIN

65044 M800 34 PIN

They also sell the pins only on the next page. I'll have to find a US dealer and see what they want for them. BTW they have a lot of other connectors too.



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gsxturbo


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I have only found one place in North America who has them in stock and the minimum order quantity is 7000 at .11 ea. so 770.00 for 7000 if enough people wanted them you could split them up between the people who wanted them and you would have plenty to go around say 5 people thats .

1400 pins for 154.00 per person it sounds like alot but if you pay .72 a piece for them before long you will have more than 154.00 in pins if you plan on using very many.

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gsxturbo


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Here are some pins from a VERY common ECU that you can find anywhere you have to trim the copper case off the end and they fit in with no modifications and lock into the connector. These are from a Ford escort but just about any Ford product 90 or newer should have the same ends.





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Gjim


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This is my attempt at making the BDM port a little neater

I intend to pot the openings and make a cover for the plug



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PetriK


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Its gonna be interesting to hear how you guys solder the connector. I had problems with emptying the thruholes without exposing the other side and ended up soldering individual pins to the pcb (for AUD connector). Sorry to jump in to the 16bit side, but I think this is a challenge for both 16bit and 32bit ecu hackers to increase the comfortability for end users of doing this kind of modifications to the ecus.

K5_AUD_interface.jpg

-- Edited by PetriK at 10:42, 2008-01-29

-- Edited by PetriK at 10:43, 2008-01-29

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Geri_Pete


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PetriK wrote:

This is excellent - much less scary. I have also thought of putting silicone or hot glue to cover the exposed PCB. Looking forward to see the instructions soon...

But to the other point - do you know any good source for the harness connectors ? With individual pins like this there is always a risk for misconnecting those...

Either pins only or hopefully full connectors





Hey guys I have found this site who produce the connectors, but I cannot yet find a supplier for them. If anyone can find a supplier that would be great, there doesn't seem to be one in the UK that I can find.

ECU Connectors

-- Edited by Geri_Pete at 15:53, 2008-07-13

-- Edited by Geri_Pete at 17:14, 2008-07-13

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Rhinoman


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Has anyone got the original Motorola drivers for their application note AN1230/D? Freescale say that they no longer support this.
Cheers
James

-- Edited by Rhinoman at 17:31, 2008-07-16

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PetriK


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Pete,

Tony hinted me earlier about a supplier in UK then I just forgot it as I have been too busy with other projects.

AMP superseal 1.0 the part number is 1437288-3  / 60 pin header

There is a place called Dalroadnorslo in England who has them in stock here is their phone number  00 44 (0) 1582 505252

18.5-16 awg          3-1447221-3
20 awg                 3-1447221-4
22-20 awg            3-1447221-5

These are Tyco AMP part numbers - he said.

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Geri_Pete


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Hi Petrik.

I've spoken to Dalroad, and they can do everything with a lead-time but the suplier's minimum order quantities are outrageous. For those pins listed above, MOQ is 28,000, which is just under £3000. The only thing they have in stock are the small plugs.


Good afternoon Pete,

With reference to your recent email enquiry, we are pleased to quote as follows.


Part Number Price Each MOQ Lead Time
1437288-3 £5.35 320 10-11 weeks
4-1437290-0 £4.34 500 9-10 weeks
3-1437290-7 £4.95 - Ex Stock
1437288-1 £3.68 560 12-13 weeks
1437288-6 £3.84 17 11-12 weeks

Part Number Price Per 1000 MOQ Lead Time
3-1447221-3 (reel) £104.11 28000 10-11 weeks
3-1447221-4 (reel) £104.11 28000 10-11 weeks
3-1447221-5 £104.11 28000 10-11 weeks


Payment terms: Proforma.

The above quotation is valid for 30 days and subject to Dalroad Norslo Ltd standard terms and conditions, a copy of which is available upon request.

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PetriK


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That is bit too many - can we find an alternative to smaller quantities ? I am certainly interested for a few of those...

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Chipwizard


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Hi Guys
Don't know if it's any interest but I can get the ECU connectors from DTA in the UK.
They charge £19 each for them.
Very interesting forum by the way.... I'm on with building a circuit car for next year with a Hayabusa motor so some info on here is very interesting indeed.

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