[marctronixx]

hello.

obvious things to check are codes at the obd port, if there are no codes, it may be a parasitic drain..

stats:

what model?
did you purchase new?
if used, did you just purchase it?
any electrical mods on the car?
prior to this issue, woudl the car start up right away or was there some hesitation?

BCM could be an issue
the IPDM could also be an issue
the Brake pedal sensor could be an issue.

on later model amradas and Qx's, there is a "storage switch" that, when activated, will cut power to the electronics.

 

[marctronixx]

The battery nissan puts in these cars is just bare minimum and is not designed to sustain the loads the computer, sensors, etc demand, so the first mod to do is get a beefier battery.

The battery cables are not the best and yeah they8 should also be upgraded. They will work obviously and they can be fine for years and years but sometimes the subpar power cables that @F4N4EVR is speaking about can cause some issues if there is a flaw present somewhere.

 

[marctronixx]

the "problem" is short, stops and not getting the battery enough time to recharge. the nissan charging system is designed with emissions in mind - meaning the system keeps the charge current low /minimal just enough to meet the demands of what the system is asking, and nothing more.

at a cold startup, you see the battery meter spike to 14+ volts, then after 30-45 seconds ish it goes back down to 13 volts. that is the design of the system. at times, the volts will go up a couple volts (you turn on the headlamps, you turn on the AC, some sensor needs more current).

so with this low charge current, the battery wont ever be charged back to 14 volts, unless you drive for some hours.

that weird looking block thing on the negative battery cable at the battery post? thats the sensor that senses how much current is being used by the car and it alerts the ECM that in turn increases voltage demand. some cats have removed this sensor, and when doing so, the alternator charges /send voltage at a much higher rate.

you car is likely fine, but i totally understand your dilemma! i bought a second battery to swap out with and keep one charged.

i recommend you invest in this little guy:

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www.amazon.com

you can use this to keep track of your battery at rest and also see the charge state dynamically. i had this on my Qx...

 

[marctronixx]

Thank you for the quick reply but, this happens regardless of if it is a short drive doing errands or a 3 hour drive.. no car or truck at this age should run like this, and none of my past cars have.. I shouldn't have to buy a spare battery, a trickle charge or a battery booster just to make sure I can make it home from where I am because the truck will not start. That is unacceptable on the part of Infiniti.

my point is the charging system will not charge the battery up as you would expect. Primo added some extra bits that will further shed light on this.

your car is likely not at fault, but that does not mean that you may not have an issue elsewhere. maybe you should spend the 80 bux to have nissan give it a once over.

you are right - you should not have to do those things, and you dont normally. i mean ive had my 2012 qx new since 2012 and ive never had a stall or any other issue with the battery. i DID use odyssey batteries and never looked back. the stock nissan battery is not robust for the sensors and computer network the car has and thet battery should be replaced soon.

again, there are thousands of these cars on the road and not everyone has issues that you and some others here describe. there could be some other issues that are not showing their head yet, so a diag of your car may be in order.

 

[marctronixx]

Read post #10

Armada (and QX) charging system problem fix

Long story but answers a few questions that Nissan can't. I spent hours on the phone with Nissan local and Nissan north America with their answers to questions limited to -we can't- they can't-it won't-uh huh- and so sorry- then I got into the books and tools. As we all know, the Armadas leak...

www.clubarmada.com

 

[marctronixx]

doubtful nissan changed the design. it as been this way for years and years. what you are noticing is an edge case and likely will return back to normal if you keep driving. ive seen that behavior before and there's certain conditions that cause the battery to stay at a higher current, ,but its usually temporary.

 

[marctronixx]

U1000
Controller Area Network (CAN) communication harness is open or shorted
Faulty Engine Control Module (ECM)
Poor harness ground connection.

you will have to visually inspect wiring harnesses and look for any signs of corrosion, bent wires/pins, faulty grounds. the canbus needs continuity all throughout the system. its serial in nature, so if there is a weak link somewhere ,it can cripple the car.

also with this basic error, usually there is some other code because that other code would pinpoint the issue, so i would go to another shop and re check the codes again. its only the u1000 shows up, then its a visual inspection that is needed.

 

[marctronixx]

your 2019 is no different than a 2018 or 2017 in terms of this mod being done. the dealer just dont want to modify something thats not sanctioned by nissan.

you can do it yourself. if not, and if you have a trusted mechanic, give them the link to this thread and have them do it. there are photos and all the info needed to get this done. there is also a youtube video to shed light on this.

 

[marctronixx]

are you mechanically inclined? can you read a schematic?
if you are not comfortable doing those two things, you should not mess around with this system. the color codes of model years differ , so what may be a purple wire on a certain year model could be blue/brown on another year, this is why reading a schematic and tracing wires is imperative.

id recommend you find another nissan dealer and ask them if they have heard of this mod and if they would do it for you. otherwise, find a trusted mechanic who can do this.

if you have emissions testing done in your area, you should also make it so its reversible if you need it to be.

 

[marctronixx]

cant speak for anyone else but i dont know who you are, man or woman, and i did not mean any disrespect either way. i don't know your comfort level with mechanics , hence why I asked. based on your posts it seems you could not gather the data in this thread to make the mod, when others did, so that is why i mentioned a mechanic.

i agree 100% , squeaky wheel gets the grease. you knew better and pushed back and the dealer sided with you because they knew you knew..

your car's charging system is still the same as in prior years based on the operators manual in that regard and the dealer knew that as well.

happy to hear all is going as you want.

 

[marctronixx]

your battery may be on its way out or something else in the chain. this "feature" has been on nissan products for years. it doesn't just start up out of the blue.

 

[marctronixx]

you can look in the operator's manual of earlier armadas,titans and nissan sedans and see this "smart feature". its not new.

 

[marctronixx]

there's nothing wrong. if you are trying to infer that my post was snippy, it wasn't. you can't tell tone over just words. perhaps i should have put up an emoji..