MCA ECU Reflash


Information and questions on GL1800 Goldwings (2001-2017)
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itsrealfast
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Motorcycle: GL1800

MCA ECU Reflash

Post by itsrealfast »



Hi guys I am working on a project and would like to see if there are any companies or members that can dump the 38770-MCA ecu? It doesn't have to be the MCA ecu specifically but any model with the 3 plugs. I need to find a tool that can extract the firmware or if there are some K-Line commands I can try.

Was there any development? If so how much success?

Thanks again



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AZgl1800
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Re: MCA ECU Reflash

Post by AZgl1800 »

I remember vaguely hearing of some company that could reflash the ECU, so they must be able to read it also.
~John

'02 GL1800
2009 Piaggio MP3 250cc

itsrealfast
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Re: MCA ECU Reflash

Post by itsrealfast »

AZgl1800 wrote:
Tue May 28, 2019 3:15 pm
I remember vaguely hearing of some company that could reflash the ECU, so they must be able to read it also.
Hi John could you do some digging and see if you can find out which company.

Thanks

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keithg64
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Re: MCA ECU Reflash

Post by keithg64 »

Although it was very hard to find. This is the place that does the reflash.

http://www.guhlmotors.com/
It's not what you buy, it's what you build.

itsrealfast
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Re: MCA ECU Reflash

Post by itsrealfast »

Does anybody have just the wiring diagram of the MCA ecu? Or the diagram from the 2001 to 2005 GL1800? I need to see just the pinout page.

Thanks

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WingAdmin
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Re: MCA ECU Reflash

Post by WingAdmin »

itsrealfast wrote:
Mon Jun 03, 2019 11:25 pm
Does anybody have just the wiring diagram of the MCA ecu? Or the diagram from the 2001 to 2005 GL1800? I need to see just the pinout page.

Thanks
Hopefully this will help:

ECM Wire Identification
ECM Wire Identification


ECM Connector Pinout
ECM Connector Pinout


itsrealfast
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Joined: Tue May 28, 2019 9:40 am
Location: Miami
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Re: MCA ECU Reflash

Post by itsrealfast »

Thanks for those images very helpful!

So it looks like this ecu does not have a Kline pin for diagnostics with scan tool. I see the RXD-TXD pin but it does not connect to anything.

How are Troubles Codes checked on this model Goldwing? Do you jump the SCS pin to check codes?

I am asking the question above because I am looking for a scan tool that can scan the ecu with kline commands this way I can sniff the communication. The sniffed communication will help with reverse engineering the protocol and see if I can read the bin file off the ecu.

I depotted a similar 3 plug ecu like the Goldwing and was able to map out the kline circuit on the PCB so this tells me the RXD-TXD pin is indeed Kline but did Honda remove it from code and is this pin considered dead? I highly doubt it since the circuit is populated on PCB.

Back to the drawing board....

Thanks



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