One of those dreaded alternator failure, replacement, still something wrong issue solved!

Hey good day...

Let me start by saying I Have a 2010 Nissan Murano Z51

QR25DE engine....


Im not sure if something similar happened to me but I've been driving quite fine and today out of the blue, the battery and brake lights come on.
I feel the van vibrate a bit when coming to stop and when I engage the air conditioner so the first thing to my mind was that the alternator is gone and I'm running from battery only.

Both lights were constantly on even if I tried revving the van (and it wouldn't rev much either).
after driving a bit I realize other lights on the dash started to come on but I had already shut off the radio and ac, unplugged chargers from the cig lighters etc just so that nothing would use any battery power.

I then noticed the VDC light on and shortly after the ABS light... So I'm thinking that the van is slowly shutting down non-essential services..... lol

finally light blinked on the dash and then van halted.. at a few intervals there was the smell of burnt rubber but thanks fully that wasn't my tranny or anything... ..

Later after inspecting the serpentine belt, I could tell that it got worn a bit ( So I may just get another right away).....

Reading a few posts they spoke about the alternator going bad and some spoke about the plug/wires being burnt

I noticed 2 connectors and 3 connectors to my alternator.... ...
1 - the main one with the 10 or 8-mm nut
2- a big 2-plug connector
3 - hidden in the back n very hard to reach with dismantling...another 2 wire connector, .. no idea what it is for




I tugged on the 3rd one I just mentioned and the wires just came right out to connect the housing with the metal ends on them still, it sparked a lil too... ...





This i will have to sort out and then check to see if i really will need to replace my alternator...

Oh, i bought the van with an alternator that had already been replaced.. and looking at the part number on my alternator, i realize the part number matches that of the Nissan rouge (12v \ 110A)

My original part number 231001AB1B - 12v\ 130A

Ok folks, quick update...

So I took the alternator out and pulled it and inspected it, everything look pretty normal, with no burning smell, no weird sounds or anything like that when u spin the pulley.
Cleaned it up a bit and put it back in the vehicle. Started the van with a jumper pack and as soon as the jumper pack was disconnected, the vehicle basically started struggling to keep up.

So my friends suggested trying a stronger battery, just in case mine was really on its way out.
So we put everything back together... Oh this is a battery that I was getting 12.5V from
Started the van... it was running though u could see it vibrating like it started to shut down a few systems...






check the voltage of the battery...... I got 9.5v

so I will just go ahead and replace this alternator.

I didn't have my scan tool (not as advanced as the one in the video above) so I could scan the vehicle to know what's up.
But I know for a fact that it will show me that low battery voltage among a few other codes.

I also plan to run through as much wiring as I can n check ground connections.
I noticed I have a lil power steering fluid leak so I will check whatever wires/ground connectors or sensors are back there just in case oil may be messing with something else there...

Regarding the three-wire plug I mentioned, there seems to be some modification because the original alternator for the QR25DE in the Z51 Murano is rated at 130A (3 wires) and not 110A (2-wire plug)... Sorry, no pics of the voltage being tested... It was getting dark and the mosquitoes were out... lol...



one thing I did notice though is that my AC compressor pulley is dancing... lol.. so I will have to get that addressed asap.. (that would explain the rough noise I hear few times when I come to a stop)


Though the condition of my belt looks good, I noticed that one side had more rubbing than the other..