voltage questions

[lil98cabrio 10+ year member]

alright i drive a 2005 honda civic hybrid, and the other day i was installing a new sirius when the intergration dock was not turning on, so i pulled my DMM out and saw that my car was chargeing at 16.8 volts. and i have an extra battery that i just added and wondering if i will have a problem since its a 12volt batt.

i have there pics of the resting voltage at 14 something and the car tunred on its 16.89 volts and a pics of the extra battery.

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[nateberrier 10+ year member]

do you have a stock alt?

 

[lil98cabrio 10+ year member]

do you have a stock alt?

yes, the car is completly stock.

 

[Haunz 10+ year member]

16.89 volts is way high for a stock alt. On the otherhand that looks like a pretty cheap meter, and I might not trust it. I'd try another meter and see what you get.

 

[lil98cabrio 10+ year member]

16.89 volts is way high for a stock alt. On the otherhand that looks like a pretty cheap meter, and I might not trust it. I'd try another meter and see what you get.

this meter reads just fine, and i dont have another at the moment to use. im thinking its due to the fact that it is hybrid that the charging system is higher.

 

[lil98cabrio 10+ year member]

anyone??

 

[iLL Ridge 10+ year member]

**** that's high.

 

[nateberrier 10+ year member]

found this on the nets

fanfaron is absolutely correct. The gen 1 Civic hybrid does not have an alternator.
In all likelihood you have an electrical problem on your downstream 12V system or your DC-DC module is operating outside its specs (needs replacement) and that is causing an inadequate charge to be delivered to the 12V battery. Bad NiMH battery packs are also known to cause these types of issues. Heck, even a faulty BCM could cause this.

Charging occurs when the voltage baselines at 13.6 to 13.9 volts.

So, I would suggest it is time to take it to the dealer for 20 minutes worth of HDS diagnostics. They'll tell you for sure what's up and what needs to be done about it.

 

[lil98cabrio 10+ year member]

found this on the nets

Damnn, I guess ill have to get that checked out. Thanks man for finding that. I tried looking but couldn't find anything.