kwp 2000 read/write on a honda bike ecu.

EPROM EEPROM SRAM NVRAM Flash chips, reading/writing hardware and software
briney
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kwp 2000 read/write on a honda bike ecu.

Post by briney »

first things first. i'm a total noob, so here goes. i've got a ct110 (postie) which i've fitted an atc125 crank and barrel to. which makes it a 125. i've fitted the complete efi setup to it from a cbr125. didn't take much doing surprisingly. i'm trying to communicate with the ecu, just to look at what it's doing mainly. later i'll have to suck the bin out of it and make some changes. it's running, and seems to be ok. haven't put the wideband or anything on it yet.

i found a thread on thumpertalk about connecting the diagnostic plug to a $10 ebay obd2-usb adaptor. (the writeup was for a crf450, which honda supplies a program for.) hooked it up, and tried it on a generic obd2 program. it said the adaptor was ok, and could read the data stream, but couldn't connect for some reason. there's heaps of kwp2000 adaptors out there, but they look the same as what i've got. been trawling the internet for software and tried a couple out with no success. has anyone had a go at something like this?
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Re: kwp 2000 read/write on a honda bike ecu.

Post by antus »

What info do you have about the ecu? model or service number? Any circuit diagrams? Can you name any existing software which is supposed to work?
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
briney
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Re: kwp 2000 read/write on a honda bike ecu.

Post by briney »

i'll have a look and see what's on it. the oem honda software works, but i'm not sure it's available to the public for the non racing models. i've bought a spare ecu to open up and see what's going on inside. the healtech software is meant to work. didn't work with my adaptor though. by circuit diagram, do you mean wiring diagram? or something else?
vlt304
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Re: kwp 2000 read/write on a honda bike ecu.

Post by vlt304 »

i have an after market efi setup on my honda c90 (lifan 140cc engine) it was made by Ecotrons in the US it is full adjustable and closed loop both spark and fuel. if you have too much trouble finding a tuning solution for the oem ecu perhaps try 1 of their ecu setups http://www.ecotrons.com/products/small_ ... ction_kit/
jay woo
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Re: kwp 2000 read/write on a honda bike ecu.

Post by jay woo »

Is the hrc software specific to a hrc ecu. I doubt it will work on anything other than the ecu that is listed as working with the software. Most of the software for racing motorcycles is very limited and could probable be thought of as a table of corrections made to the main table. Usually they have specific tables that can be written to via the software. The commands used to communicate with the ecu are specific and the software in the ecu is usually custom to enable the features. Is it possible to reflash the ecu via kwp 2000 as this would open up many more options.
briney
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Re: kwp 2000 read/write on a honda bike ecu.

Post by briney »

vlt304 wrote:i have an after market efi setup on my honda c90 (lifan 140cc engine) it was made by Ecotrons in the US it is full adjustable and closed loop both spark and fuel. if you have too much trouble finding a tuning solution for the oem ecu perhaps try 1 of their ecu setups http://www.ecotrons.com/products/small_ ... ction_kit/
i've seen the ecotrons stuff. i'd like to use the oem bits because it seems a lot better sealed, which is important as this bike sees plenty of dirt and/or water. also, it has idle speed control and closed loop mixture control. and believe it or not, i probably got all the bits together for less than the cost of the basic ecotrons setup. it's still an option at the back of my mind though.

jaywoo, i reckon your assessment is spot on. you can't change very much in the racing models at all. this computer has a k line output, which i was led to believe is vital to the whole kwp2000 deal? i'm new to this.
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Re: kwp 2000 read/write on a honda bike ecu.

Post by jay woo »

If you need any explanation about something just ask as most people around here are helpful and friendly. crf450 is not a road bike and will not have to comply with road bike emissions. The manufacture is fairly safe from a EPA point of view to allow people to make some basic changes to the fuel and ignition. Just google Harley Davidson and EPA and you will see what I am talking about. I doubt the feature of modifying the fuel and ignition using the Honda software will be in any ecu from honda except a HRC ecu or the CFR450 ECU.

What you may be able to do is read a bin from the ECU. If a bin is available then it would be possible to adjust the .bin and upload the changes to the ECU. This assumes that the ability to re flash is present, highly likely on a road bike ecu. This is a overly simplified view and really ignores some of the more difficult issues. This is likely to be a very difficult process unless someone has experience in reverse engineering a Honda ECU's.

Do you have a picture of the ECU?
briney
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Re: kwp 2000 read/write on a honda bike ecu.

Post by briney »

yes. i've also found the people on here to be both knowledgeable and helpful. i'd like to eventually pull the bin out of this computer and find the relevant parts to tune it. i've got a hex editor among other things. brace for a veritable barrage of questions once that happens. lol. anyway, here's a pic of the ecm.
Image
jay woo
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Re: kwp 2000 read/write on a honda bike ecu.

Post by jay woo »

I can only think of one person who may have managed to reverse a Honda ecu like the one in the picture. He usually sells software for reflashing and tuning ecu's. I will message him and see if he has reversed this model and if he is willing to help. I have a bit of an interest in these for different reasons. I think you mau find these use a motorola processor like MC9S12T64.
briney
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Re: kwp 2000 read/write on a honda bike ecu.

Post by briney »

ok. thanks.
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