I have a buddy who just IMed me asking if a chipped ECU can drain the battery completely dead. The car was running and he turned it off for about 1 min and tried starting it and it didnt start... Got a new battery to put in there from another car and it fired right up? Please help with this situation ASAP, my buddy would really apprecieate it... Thanks.

 

i know somebodies gotta be in this forum tonight.... please help out here.... I know its a noob question but I need to know.... Thanks....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by compwc18 &raquo;</TD></TR><TR><TD CLASS="quote">I have a buddy...</TD></TR></TABLE>What kind of car does he have? '72 Pinto?

Most newer Hondas have a function where the ECU can disable the alternator when it wants to. Normally this happens if the battery is fully charged & most electrical loads are turned off. I think it's the 'C' wire on the alternator.

If the ECU closes that wire to ground the alternator stops charging. If the chip was mistakenly programmed to close that wire to ground all the time, it's a problem. If that wire is simply worn bare & shorting to ground, it'll do the same thing but that's not the ECU's fault.

Of course, it could just be a bad battery. I had one fail on me just like that. With the new battery he should keep watching the charging voltage BEFORE he kills the new one.

 

Were was the car at when it broke down?...Cuz if it was some were like jack in the box at 3am it could have just been good old jack messing with you...lol...Thats all I have to say...

 

get the car running and with a volt meter make sure that the car is charging it should be around 13.0 to 14.5 volts running.

 

I had already diagnosed the problem with the car, its as simple as a damn ground wire, and the main relay.... Which wasnt clicking on to prime the fuel pump.... It's all working now....