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-   -   alternator question (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/109578-alternator-question.html)

andrewwynn 01-06-2019 03:57 PM

Wonky fan operation the prime suspect is FSU.

I misread the 18 year old battery at first also


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andrewwynn 01-06-2019 04:28 PM

alternator question
 
Quote:

Originally Posted by ahlem (Post 1151211)
What scanner did you use to get the graphs? Mine is a 14020SCH small hand held unit. Their instructions are not the best and I haven't found the location on the menu to test the battery voltage. I just got it so I'm not that familiar with it's functions.


I use foxwell NT510. I can achieve the same with wifi obd dongle and dash command on my phone.

In the engine module there is an engine operating values includes vbat but many modules will have. Very helpful to have both rpm and vBat.

The graph at start-up is very interesting I'll have to redo that.

ahlem 01-06-2019 05:07 PM

If FSU is "Final something Unit", That got replaced last Summer.
It's the small bed of nails that goes in the passenger footwell.

ahlem 01-06-2019 05:51 PM

Mr. Schwaben and my multimeter both say 13.9 volts. I'm guessing I either have a dying heater motor or a parasitic drain of some sort. The rear defrost indicator, and the two additional indicators above(?) it will flicker most of the time when I'm having the no fan situation. I found the Schwaben information on the "Live Data" choice.

andrewwynn 01-06-2019 06:32 PM

Final stage unit. Sometimes erroneously called the FSR or final stage resistor is often called the hedgehog or porcupine.

If you are having blinking in the lights on the controls I would suggest a problem with the control panel. You should be able to direct drive the blower with your scanner is it's similar to the foxwell.

upallnight 01-07-2019 10:59 AM

Quote:

Originally Posted by ahlem (Post 1151236)
The battery is a week old. I charged it last night and the heater fan worked on the way to church this morning. I will test with my meter to see what the alternator is putting out.

The Lord works in mysterious ways.

andrewwynn 01-07-2019 11:47 AM

Fun comment made me laugh

synct 01-11-2019 01:28 PM

Weak Alternator Can have strange effects
 
I am about to install the third alternator in my X5 3.0 in 5 years. The first two were Bosch and both lasted about two years. Fortunately for FCP Euro, The last two were replaced free (except for labor of course!) Now, they’re sending me a Valejo, today, which is supposed to be OEM, at no additional charge, With free replacement Under their lifetime warranty.

However, In the last two days, I got a Stanley battery charger at Walmart which showed something very interesting. I have been having misfire problems for six months and weak power. Three different mechanics couldn’t diagnose it.

In order to get around during the last 2 days, I charged up my one year old Diehard Gold battery to 100% and- to my surprise, my performance and power issues disappeared. That is, until the battery voltage went down again below 10 volts On some local trips. By The way, 100% recharging took at least 24 to 36 hours.

I’m looking forward to getting the new Alternator and hoping that my power problems are gone. I never suspected that it might be an alternator problem, But if the spark plugs are not getting enough power, I can understand it.

The Stanley charger also diagnosed the alternator is being bad. My little Ebay digital voltage meter in my cigar lighter also allowed me to tell when I was about to run out. I hope this helps someone...


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