warchild69

Well,...I posted this on http://www.thezcr.com too... trying to get some answers and not having luck there.. so, i will try and make this short.... but im sure it will be long... sorry guys!...I have a Po6 OBD-1 ecu...and a DOHC ZC in an 88 CrxSi... just did a wire tuck at the same time as the motor install.... all grounds at the water outlet, valve cover, and the tranny to body are 100% overkill... Just got my drag motor started yesterday!... it gave me a code #14 and #20.... got the #14 fixed.. as i forgot to connect that wire... now the code #20... i cant get good solid info on this but what it seems is, the ELD in the underhood/main fuse box tells the computer to bump the idle up when a load has been put on the charging system.... right????... or does it tell the Voltage Reg in the Alt to produce more power????

So... when i seen that the code #14 had the Cel on.. it showed me the #20... when i fixed the #14... no more light... but i checked the code anyway and it is there just not lighting the Cel!.....

This made me think to check the voltage from the Alt and see if a "no charge" condition my be the cause of the code # 20.... it was putting out 18.5 volts!.... i freaked out!... though the voltage regulator in the Alt was toast and took it to the parts store where i used to work... bench tested it... was putting out 14.5volts... i tested it like 5-7 times... took it home.. mounted it.... 18.5volts!!!.... have a second Alt laying around.. mounted it... 19.5volts!!! There are 4 wires to the Alt + 1 fat white to the main fuse box... I unhooked the Blue...no result.... Wht/yel... no result,... Wht/blu.... no results, and when i unhooked the Blk/yel... it turned the Alt off and stopped producing power...

I checked the "manual" and tested the Blue wire to make sure there are no breaks in it from the ecu to the Alt.... Cant find solid info on how to test the ELD and that is the least of my worrys if it is not causing my overcharging condition!

I checked for the 5-5.5volts from test leads on B14 and A18 and it is correct... also when i made the conversion harness... i double checked the D9 to B14 which is obd-1 pnk --------> obd-0 blu

Will the ELD tell the Alt to go into Extreme Voltage mode?... or maybe i missed a wire somewhere and it will automaticly do this with something not hooked up right>???

The ELD has 3 wires to it, Blk/yel, Grn/red, and black.... I have read about people having problems with the Blk ground... and to run an extra ground wire to it to see if that gets rid of the code #20... but have not heard of overcharging because of it...... you think that yours was charging high because of it too?... just not for sure if the ELD is causing my overcharging prob or not....Thanks man!

I just checked this link... http://autorepair.about.com/li...b.htm Got to #6 and it ask to turn on the headlights...and test for 2volts... i have not extended the wires for my headlights yet from the wire tuck... so there where no bulbs to draw the current down.. but it read 3.45v and i figure the difference is because i have no headlights...

I also checked this link on the ZCR... http://www.thezcr.com/forums/s...17784 the code #20 is at the very very bottom..... but there are only 2 of the 3 pages for code #20 listed... Dank91 sent me the last page!....Thanks man!!!

I have battery current from Blk/yel and Black......

I unhooked the 3p connector, connected the Grn/red harness side to body ground.... Tested for continuity between the body ground and B19 with the B plug unhooked, testing directly on the ECU and i DO have continuity... as specificed.....

I tested Grn/red to black with the ign switch on... and it has 5volts....

It tested pretty much between the voltage specfications that was needed on the 3rd page.... so it seems to check out!....

Any ideas? Why it is still overcharging?

AGAIN SORRY THIS IS SO LONG... BUT, HELP IS REALLY NEEDED!

warchild69

Anyone?.... man this thing is putting out so much voltage i just dont know what to do with it!......

warchild69

it is hard to believe that no one else has ever had this problem..i have searched on here but found nothing.... bummer!

welfarepc

your post is painfully long

my frined had the same problem, and his head lights would blow out...

swapped the alt for a new one and it all went away. something to do with the voltage regulator?

gl

Crx Jimmy

If you are sure the alt is good, then use a tuning program to disable the eld, I have the same ecu converted to a p28 and I dont even have the eld wires connected. The eld in the ecu is disabled. See if that helps. The only thing I know controls voltage is the voltage regulator in the alt. The eld just ups the rpm when there is a big load on the motor(like ac or lights). Be careful at that voltage you can start big problems.

warchild69

Well got part of it!... okay... the Alt overcharging the battery was causing the code #20!... i unhooked the Alt again.. and ran the car and lights till i drained the battery to 14.5 volts... reset the ecu..... and no more code!....

Yea... i know they Alt is good... i have tried 2 of them now... and bench tested them both at the parts store and they checkout fine.....

i Do still have the problem with the OVERCHARGING!!!!!!... bummer!.... but at least i have some of it figured out!..... any ideas welcome guys!



Modified by warchild69 at 10:56 PM 1/28/2008

grog

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by warchild69 &raquo;</TD></TR><TR><TD CLASS="quote"> Yea... i know they Alt is good... i have tried 2 of them now... and bench tested them both at the parts store and they checkout fine.....
[/i]</TD></TR></TABLE>

thats weird. I cant help but say it's most likely the alternator/ voltage regulator, it has to be, its the only thing controlling the alt. My understanding of the eld is that it will bump up the idle to deal with increasing electical load, but it doesnt increase the output of the alternator by that much.
Did the last alternator also overcharge to 19volts?

Do you have amps and subs by chance? look here if so https://honda-tech.com/zerothread?id=794575

DailyDriverCivic

Where is the voltage regulator? I am new to honda's for the most part, but I am 99% sure it is in the alternator. This is basically the only thing that will cause this condition. Also, your original post was TLDR (Too Long Didn't Read). Seems like a long post for a simple problem. What are you measuring voltage with? I would try another Multimeter. I see it as a 1 in a million that 2 alternators are gonna have a 19.5V charging condition, as it is very rare. I have seen messed up multimeters give bad measurments.

90_EX_Civic

damn man, send me one of those alts so that i can run my system with it. 19 volts, damn, you could probably run a 2000w system and have no problems.

welfarepc

i would double check any wiring that you changed when you did the swap. try to refrence a different how to just to make sure

warchild69

Yea both of the Alternator's are putting out 19.5-20volts on the car... i have taken both into the parts store and they are only putting out 14.5 on the bench there!...

I will check it with another multimeter, but this one is a nice Craftsman one.. and pretty new!

The car has no sound system at all... just pretty much a drag car... no heat, no air, no creature comforts of any type...

The Voltage regulator is inside the Alternator and seems to be working fine on the bench tester... but not my car


Modified by warchild69 at 12:16 PM 1/29/2008

grog

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by welfarepc &raquo;</TD></TR><TR><TD CLASS="quote">i would double check any wiring that you changed when you did the swap. try to refrence a different how to just to make sure</TD></TR></TABLE>

x2 and maybe you can ask people who have done wire tuck's if they have seen anything like this. I think there is a big wire tuck thread somewhere.

good luck.
and let us know how you fix it.

warchild69

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DailyDriverCivic &raquo;</TD></TR><TR><TD CLASS="quote">Where is the voltage regulator? I am new to honda's for the most part, but I am 99% sure it is in the alternator. This is basically the only thing that will cause this condition. Also, your original post was TLDR (Too Long Didn't Read). Seems like a long post for a simple problem. What are you measuring voltage with? I would try another Multimeter. I see it as a 1 in a million that 2 alternators are gonna have a 19.5V charging condition, as it is very rare. I have seen messed up multimeters give bad measurments.</TD></TR></TABLE>

Got it!.. All fixed!!! Woooo Hoooo!

You will never believe what it was!!!

I feel stupid!

Thanks for all the Help guys... Sorry i have tied everyone up on this that has been helping and all... but at least it is working great now!...

Check the photo!...It was putting out 19.5 not connected to the battery.. and 17 connected..... can you see what was wrong?????<U></U>http://www.thezcr.com/gallery/.../2461

welfarepc

i cant see whats wrong from the picture... tell us so the next person can search and find your thread and have answers.

warchild69

If you look at the two mulit-meters... one reads one # and the other reads something different!.... what a pita!!! but it is all up and running now!.. no codes... no overcharging... no problem!...

grog

btw what brand multimeter was that? it looks like a craftsman? man they really need to stick to hand tools.

that is pretty messed up!

slumpinhonda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90_EX_Civic &raquo;</TD></TR><TR><TD CLASS="quote">damn man, send me one of those alts so that i can run my system with it. 19 volts, damn, you could probably run a 2000w system and have no problems. </TD></TR></TABLE>

you'll toast most amps at the high of voltage........some amps will let you run 18 volts all that does is make more power out of the amps

warchild69

It is man!... it is a craftsman multimeter!!!...... wtf!.... and that cheapo is the one that works!..lol...

Crx Jimmy

Glad you got it figured out.

90_EX_Civic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slumpinhonda &raquo;</TD></TR><TR><TD CLASS="quote">

you'll toast most amps at the high of voltage........some amps will let you run 18 volts all that does is make more power out of the amps</TD></TR></TABLE>

actually if its a good quality class D amp 19 volts won't hurt it. but 19 volts is more in the line of a 5000watt+ system. guys running spl would probably laugh and say 19 volts still isn't enough for there system.