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Hacking up Honda's ECU
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 Post subject: Datalog with rs232
PostPosted: Wed Jun 08, 2016 1:42 am 
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Joined: Thu Jun 02, 2016 5:10 am
Posts: 1
Hello all
I read alot of diy
But still dont have find a diy about this cable
I have usb to rs232 cable
Have a 4 pin but dont understand which wire need connect to ecu
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 Post subject: Re: Datalog with rs232
PostPosted: Thu Jun 09, 2016 10:39 pm 
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Joined: Sat Sep 22, 2012 1:00 am
Posts: 204
Location: seattle washington, usa
If you have the right cable, black will go to cn2 pin 1, white will go cn2 pin 2, green will go to cn2 pin 4, and red will be unused.


Just incase my memory failed me and I got the colors wrong,
V+=unused
Tx=ecu rx cn2 pin 2
Rx=ecu tx cn2 pin 4
Gnd=ecu gnd cn2 pin 1
Ecu pin 3=ecu 5v regulated, do not connect
Ecu pin 5 not connected/unused


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 Post subject: Re: Datalog with rs232
PostPosted: Wed Jun 15, 2016 3:05 pm 
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Joined: Sat Jul 10, 2010 2:45 pm
Posts: 273
Location: New castle k.b
I think this is usb to rs232 12v, not TTL one.. Can you upload the driver for your cable?


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