[ledres]

Hello, it's my first post on Armada Club. I got QX80 2015 and now I have 3rd battery in my car already. It is the same issue what you guys mentioned. Original battery died after 2 years (I thought because short runs), second died in January this year with 'catastrophic' consequences. First thing radio didn't play any sound (lost coding - fixed by local professional electronic shack ), airbag light show up on desktop and blinking in " diagnostic mode". Last issue - no one know how to fix. We don't have Infiniti service in my country and specialists from Nissan service got confused. When they connect nissan consult 3P tool, they can read errors (no errors show up at all) but straight after connection internal fun blower start; first slowly and then faster and faster, finally after 10minutes car disable power and nissan consult tool is disconnected (aborted). But in this 10 min CAN bus diagnose never finish, and airbag diagnose show historical error U1000 - CAN bus issue. - May someone know what's going, some technician on forum?
Any way that was done by 2nd bad (dead) battery. Since that I monitoring my battery and battery charging is very weird.
Even I drove 200km (~130miles) on highway battery didn't get properly charge. Voltage from alternator jumping between 13-14V, on idle running (parking or red lights) dropped down to 12V(discharging battery!!!). I read thru many websites and forums and only one solution looks like works - disable (disconnecting) current sensor on negative cable from battery or signal cable PWM to alternator. I didn't modified my yet. The solution with tiny aluminum foil (shield) under current sensor doesn't work for me. I put 4-5 wraps on negative cable and still low charging voltage during driving.
I found also that after switch off engine and close car , parasitic current draining my battery is around 160mA.
Old school say it must be below 50mA. I waited more than 2 minutes to do this measurement - maybe not enough time? Today I will try wait longer time and then I will remove fuse by fuse to check what is eating battery "at night".
Save you battery guys for avoid problems like I have. I started to charge my with external charger every weekend.
Thank you for any help and suggestions.
BR
Dan

 

[ledres]

Thanks for answers. Those wires I'm planning cut today but first I have to find proper diagram for that, I can see 4 wires, +12V, ground and 2 other with signal I guess. Someone mentioned before that after cut signal wire some DTC error will show up. And the whole theory about shielding negative wire under sensor probably have to jamming\fool IPDM- ECM
to make this "undercharging" of battery. Not sure for what is that selling more batteries or some environmental business.
I made this shield isolated but maybe it should be connected to minus on battery(holder of sensor). I believe that jamming will change characteristic of charge (higher voltage for longer time during driving trip).
About this airbag error U1000, consult show it as historical error but cant clean it. I checked already all connectors grounds etc. heh car looks that time as vandalized. Then I tried different car interfaces but no luck. This running cabin fan during error readings with consult and shat down after 10minutes means something but I'm not expert.
Apart of that issues car is beautiful