xcivicboy86x

well today i had my bar exam and i failed... i passed tail pipe with flying colors.... passed visual with flying colors but for some reason my computer wont communicate with the scanner! ! dam i was soo close!!

well ne ways i have a 1997 honda civic ex and i have a p2t ecu and a 1998 b16a swap

any ideas??? could it be that my wires are obd2a and ecu is obd2b?? is the wiring different for them? or is the diagnostic plug wires different? could blown fuses be a problem? im at work so i dont have a chance to check anything out right now... but any help would be greatly appreciated....

oh yeah they tried the snap-on tool, some tool that is top of the line right now and the smog tool and it just wouldnt talk...

any ideas?


Modified by xcivicboy86x at 5:19 PM 2/2/2007

tha_badguy

i think u need a obd2a-obd2b jumper harness

xcivicboy86x

$%!&@ that is right!! man i am a friggan retrard!! i do need a jumper that would explain the problem... any one have an obd2a (female) to obd2b (male) jumper or happen to know the pinouts for the p2p and p2t?? or just obd2a and obd2b i have manual trans...

tha_badguy

or u can try to find an obd2a p30 which is almost impossible

either way a jumper harness or the ecu is gonna probably cost u about the same

4drgsr96

the ref i went to didnt allow jumper harnesses, i did an OBD2b swap in my 96 civic but wired it with obd2a plugs and used a 97 obd2a ecu and passed.

tha_badguy

did they look for it or did they ask if u used one?

xcivicboy86x

they didnt say **** except that is the proper ecu and the only ecu for that swap... because the engine is a 1998... i think its bs!! but ne ways im just gonna have to wait for my uncle to get back and i will just repin my plugs for obd2b... im an electrical engineer so it is no problem for me to do that i just dont know what wires are diff...

4drgsr96

you might have an immobilizer on an obd2b ecu so check up on that

xcivicboy86x

well this is #$%@#$!! ok so i found some pinouts on the internet so either they are wrong or my car is a freak of nature!!!
here is the obd2a http://www.ff-squad.com/technet/wiring.obd2a.htm]
and here is the obd2b http://www.ff-squad.com/technet/wiring.obd2b.htm
now what i dont understand is im using the p2t ecu.... but i have the obd2a plugs A,C,D plugged in and i should have plugs A,B,C plugged in for obd2b?!?! but yet my car runs perfectly!?!?! no codes either!! what the hell is going on!!??
in theory according to the pinouts my car should not run at all unless for some reason it thinks its an automatic?? but then wouldnt it throw codes or run like crap?!

man am i confused

xcivicboy86x

man the more i look at the pinouts the more flustered i get!! it doesnt make sense... i could just re-pin everything but what if it screws everything up.. i guess i should just try it... hope i dont F*** my car up...

Z3120

I don't get it. Your car is running fine without any problem. Maybe I'm wrong on this, shouldn't your car be running with some kind of problem due to the fact that you have the wrong type of harness?

Do you have an after market radio? I had the same problem (ecu was not communicating with the scanner) when i took my car for a smog. The car was running fine no CEL or any problem. The smog guy told me to remove the after market radio because it might be interfering with ecu. I thought that was stupid. But I removed the radio and it was communicating again. Passed smog.

fmrprojects

it doesnt matter if you use a jumper, as long as you have the correct ecu and all the emission equipment is hooked up. and pass the test

94VXLSHatchie

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fmrprojects &raquo;</TD></TR><TR><TD CLASS="quote">it doesnt matter if you use a jumper, as long as you have the correct ecu and all the emission equipment is hooked up. and pass the test</TD></TR></TABLE>

no the ref i went to in Modesto, CA told me that no type ecu jumper harnesses are allowed, you must convert everything to the year of the motor if its a different OBD than the car

tha_badguy

but did they check for 1

if they just say that but dont actually check for 1 whats the point of going thru that hassle

especially when it comes to obd2a&gt;obd2b

4drgsr96

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tha_badguy &raquo;</TD></TR><TR><TD CLASS="quote">but did they check for 1

if they just say that but dont actually check for 1 whats the point of going thru that hassle

especially when it comes to obd2a&gt;obd2b</TD></TR></TABLE>

they dont allow you to be there for the test and usually they do check. if you wanted to try an get away with what you can do is just cover with wire loom and just tape it up with black electrical tape so that it sorta looks stock. i did that since my vtec wiring was just outside of the harness but i taped it all up and they said nothing.

tha_badguy

never got a concrete answer on this...

how can I pass a 96 civic w/b16a2

obd2a p30
or
obd2a&gt;obd2b jumper w/p2p

4drgsr96

try something out and see if it works, or ask a ref.

xcivicboy86x

well the ref told me if you have a b16 you must have the p2t and only the p2t... as far as jumper i never asked him... i think my ecu is auto cuz of plug config and thats y scan tool wont talk because the scan tool wire is in plug a on obd2b and in plug d on obd2a
i already passed smog and everything but dam computer wont talk soim just gonna get a for sure obd2b p2t manual and jumper and make it look factory...

xcivicboy86x

ne one know if the state refs for BAR will pass a single cam ecu with a dual cam engine??