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Hacking up Honda's ECU
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PostPosted: Tue Feb 10, 2004 1:34 am 
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I have found a very good adapter to link the TTL output from an ECU to a Laptop or PC with a USB port. The Prolific PL-2303 works perfectly, and offers a high speed conversion that prevents reading lag. The throttle position, vehicle speed, and RPM gauge are very linear, with no jittering.

The proper cable for this mod is Radio Shack part number 170-0787, or similar cables available on eBay for Nokia models 3200 series, 5100 series, and 6100 series. The pictures I have linked to show two different adapters. The larger one in the clear housing is the unit I purchased off of eBay. The black housing is the Radio Shack #170-0787. Both cables operate the same way, but the RS cable is somewhat more complex.

http://www.imagestation.com/picture/sraid103/pdb3f4c498703bd4b752a3d6e0aaa386f/f9a982ec.jpg


http://www.imagestation.com/picture/sraid103/pc055475a8b3c32e780d9b2ea3e14883f/f9a982bc.jpg

http://www.imagestation.com/picture/sraid103/p21f5995ad1af147eccddcdbf35a41d4e/f9a9828b.jpg


http://www.imagestation.com/picture/sraid103/pb61ac6763ccb6c9671fb1fb72e798d17/f9a98251.jpg

The modification to the cables are similar.

With the Radio Shack cable, cut off the phone connector. Strip back the shielding to expose about 1" of wire.

Strip the brown wire and connect it to the shield conductor. Solder this to pin #1 on CN2.

Strip the orange wire and solder it to pin #2 on CN2. This is the RX lead on the cable.

Strip the red wire and solder it to pin #4 on CN2. This is the TX lead on the cable.

For the no-name eBay sourced cable, the hookup is very simple.

Strip the black wire and connect it to the shield conductor. Solder this to pin #1 on CN2.

Strip the white wire and solder it to pin #2 on CN2. This is the RX lead on the cable.

Strip the blue wire and solder it to pin #4 on CN2. This is the TX lead on the cable.

http://www.imagestation.com/picture/sraid103/p824ae51e3373ddb0db9a283b2c3d6fc3/f9a9822a.jpg

http://www.imagestation.com/picture/sraid103/p85944ea0c0c64024841ea7301656dc10/f9a98201.jpg


I chose the DB9 connector to allow external connection to my ECU because of simplicity and availability. Disregard the red wire in the pictures. It is +5v power for another project.

Load the USB driver into your PC or laptop. If you purchased the Radio Shack cable, you will need to download the USB driver as directed. This is not the method I recommend, because Nokia phone information is included with it. If anyone needs the proper driver, let me know. It is a 4.2mb file, but I can email it if you have the room in your inbox.

Download the proper datalogging .bin from the ECUcontrol website. Modify it as necessary for your application, burn it to an EPROM and install it in your ECU.

On your PC or laptop, open the device manager, and check your port settings for your new USB cable. Note which com port it is using, and set up ECUcontrol to read that port. If necessary open the properties tab and change the com port number to reflect the port you want it to use, like com4 or com5. Plug in your USB cable before Starting your car so it will initialize properly. Click on "start datalogging" and enjoy.

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Post Edited (02-10-04 00:57)


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PostPosted: Wed Feb 11, 2004 2:46 pm 
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nice.

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PostPosted: Wed Feb 11, 2004 4:21 pm 
btw you can send the driver file so he can post it where the 66301 pdf's are stored....
i think i will test it!


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PostPosted: Wed Feb 11, 2004 6:59 pm 
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170-0787 is not listed in the Radio Shack online catalog...

Is that the correct part number?


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PostPosted: Wed Feb 11, 2004 9:18 pm 
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averageJoe wrote:

> 170-0787 is not listed in the Radio Shack online catalog...
>
> Is that the correct part number?

I took that number directly from my package. I think they might be on clearance right now. The front of the package has the Future Dial brand on it, but Radio Shack on the back with a RS SKU.


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PostPosted: Wed Feb 11, 2004 9:19 pm 
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dohcvtec wrote:

> btw you can send the driver file so he can post it where the
> 66301 pdf's are stored....
> i think i will test it!

Who should I send it to? I tried looking on the Wiki, but I didn't see a good spot for it.


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PostPosted: Wed Feb 11, 2004 11:50 pm 
RadioShaQ no longer carries Nokia Data Cables as Verizon no longer carries Nokia Phones. So if you can find one at a local store your lucky. Also the cables are 15% off. But there is no software.
I am hoping that Jim can send me the driver file again in a zip format and I will host the file as long as it doesn't chew up all of my bandwidth. But I'm not worried about that.
Also I came up with a new way to use this data cable way he made with a phone jack. I'll post that friday after I get my camera back.

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PostPosted: Wed Feb 11, 2004 11:55 pm 
if i set my ftp server this weekend i can help on that?

send or ask blundar were to put the file in the meantime...


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PostPosted: Thu Feb 12, 2004 2:19 am 
Nokia Driver = http://dan-ang.com/pgmfi/USBDrive.zip

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PostPosted: Fri Feb 27, 2004 12:24 am 
I picked up one of the Cables from radio shack for 5 bucks. I was looking for a simple solution due to the fact the laptop my Fiancee just bought doesn't have a serial port

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Post Edited (02-27-04 00:51)


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PostPosted: Mon Mar 22, 2004 4:59 pm 
Does this cable convert RS232 to USB?? I am looking for a cheap way to make a serial-to-USB convertor.


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PostPosted: Mon Mar 22, 2004 10:56 pm 
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This cable converts TTL to USB. It will not convert RS232 to USB.


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PostPosted: Tue Apr 06, 2004 11:16 am 
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Location: Philadelphia
Good stuff Jim!...I should have read this sooner. I just go the USBMod Kit..and I dont know how to connect that to the ecu. I may have some Nokia cables laying around somewhere.....will give this a try. If you have info on how to connect the USB kit to the ecu..please help.

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PostPosted: Tue Apr 06, 2004 12:03 pm 
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Location: Philadelphia
Jim...do you think we can use something like this for people that don't have serial port on their laptops like myself.


http://www.sell.com/2L6L1
or

http://pcs5.pcs-cellular-accessories.co ... /DKU-5.php


Description for Nokia 7210/7250/6800/6610 USB Data Connectivity Kit with Software- DKU-5:

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Post Edited (04-06-04 12:06)


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PostPosted: Tue Apr 06, 2004 3:35 pm 
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I will look at the USBMOD tonight and see what I can do. I recommend the cable here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=20366&item=3090131959&rd=1 as it is one of the ones I tested for this writeup.


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