When Driving Voltage - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 2 (permalink) Old 05-10-2018, 02:22 PM Thread Starter
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When Driving Voltage

Hello All!
I got 2012 Armada SV 2WD.
I have OBD2 with bluetooth. It tells me what is going on my current driving condition.
I found something curious thing.
When my car start, Voltage around 13.5-13.9 V
and driving few mins later It Dropped 12.9-13.1V(some times 13.2V)
I changed Alt less than year ago at dealer.
Battery is 5 Month old.
i'm trying to replace battery fuse block.maybe it will help?
also OBD2 told me intake air when i driving highway +20F (more than 20 Mins Driving)is it normal?
Please Help!!!
Thanks God Bless All~~~
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post #2 of 2 (permalink) Old 05-10-2018, 04:05 PM
SE Off Road1's Avatar
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Your alternator works similar to a 2/3 stage charger. Bulk (battery < 95%), absorption (battery holding at 95%), and float (battery is > 95% . When the battery is needed for heavy loads and discharged more than 95% the output will be 14.2-14.6. Similar to absorption stage when the battery is not heavily taxed and the battery is at a state of charge around 95% you will see voltage around 13.2. and even less. Your fine and what you are seeing is normal.

When you consistently see much higher voltage for long periods in the range of 14.2-14.6 it is a sign your battery is becoming weak. A fresh strong battery will show lower charge rates.
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2005 SE Off Road: JBA LT Silver ceramic coated headers, Cajun B-Pipes with Heavy Metal Cats, Borla Dual SS Cat Back, Uprev Tuned, K&N Air Charger, CSF 3328 Aluminum Radiator, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, Bilstein HD's, Moog 81085 Rear Coils, AirLift 1000 Rear Springs.

Last edited by SE Off Road1; 05-10-2018 at 04:19 PM.
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