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Jumper J12
Posted: Tue May 24, 2005 7:52 pm
by JoeJoe1
I received my ECU socketed from Hondata and jumper J12 does not appear to be cut, what is the purpose of cutting it? and would it work fine if it is not cut? because I read that it's just a suggestion. Thanks.
Posted: Sat Jun 04, 2005 7:56 pm
by JoeJoe1
Anybody?
Posted: Sun Jun 05, 2005 1:19 am
by EGHATCH
its ok if its uncut. i didn't cut mine...datalogging works fine. thought i think its recommended.
Posted: Mon Jun 06, 2005 6:33 am
by turbo_civic_si
it lets the ecu know whether it is communicating half duplex or full duplex. when j12 is cut it switches into full duplex and allows faster communications.
Posted: Mon Jun 06, 2005 7:12 am
by JoeJoe1
Oh ok, thanks for the info guys. I'll just go ahead and cut it then.
Posted: Wed Jun 08, 2005 5:41 pm
by ak94gsr
what do u mean about faster communications?? between the labtop and ecu???
so cutting it does no harm?cause mine is not cut either
Posted: Wed Jun 08, 2005 7:46 pm
by EGHATCH
will try it later...
i guess to doesnt have a downside when cutting j12.
it means you will be datalogging if FD. transmit and receive can be done simultaneously
Posted: Thu Jun 09, 2005 9:18 am
by CivicVTi
The downside is that you cannot connect to the Honda dealers' diagnostic center with the connector under the dash. Communication is faster and you can record at a faster rate.
Posted: Thu Jun 09, 2005 11:04 am
by turbo_civic_si
faster communications between the ecu and the hondata box, etc...
half-duplex = cb radio, one person at a time can talk.
full-duplex = telephone, cell phone, etc. both can talk at the same time.
Posted: Fri Jun 10, 2005 5:33 am
by DaX
Holy hell, is this actually technical talk on the Hondata forum?

Great info guys!
Posted: Tue Jun 21, 2005 1:16 am
by Twitch
Can anybody confirm that after cutting the j12 Hondata still worked fine

Posted: Tue Jun 21, 2005 10:03 am
by turbo_civic_si
i confirm it still works fine. mine is cut and has been cut on all the ecus i've soldered for hondata.
Posted: Tue Jun 21, 2005 12:47 pm
by Twitch
turbo_civic_si wrote:i confirm it still works fine. mine is cut and has been cut on all the ecus i've soldered for hondata.
Thanks
