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#1
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Weird electrical gremlins
After work it gets more interesting... I get into my car turn it on and the radio/nav display does not come on at all. Along with that the turn signal indicators on the dash wouldn't come on when I flicked on the turn signal, and the seat belt warning light was on even though I was buckled in. Now this is really weird so I got the car back home and plugged it into my laptop to try and see if I can run diagnostics and clear some codes (BMW Scanner v1.4.0.9). SO I run a diagnostic and the RAD, TEL, NAV, PDC, and MFL sensors dont pull up at all/no data. Now I was really worried because my car definitely has all of those. Did a little bit of googling and people say to disconnect the battery for a certain amount of time to reset the computers as it seems the KBus is being overloaded. So I did that tried, 10 mins, 30 mins, 1 hour, and 2 hours all did nothing. Next I read something about a iPod DICE connector on the CD changer to I pulled out my CD changer, nothing plugged into it but for craps and giggles I unplugged it completely and started the car, Voila! Everything kicks on perfectly! Turn off the car and go about my day, go back about a hour later start the car, nothing comes on again... Back to googling and some people say a ignition switch can cause various weird electrical gremlins so I tried replacing that. Still nothing. Im completely confused on whats going on and whats causing this. Anyone have ANY ideas?
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#2
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I would start at your battery condition and charging system. Confirm those are working properly.
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Dave S. Northeast 2003 4.6is 2005 E53 4.4 2003 E39 Msport(a REAL ONE!) 1959 Fiat 600 |
#3
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Is there a specific way to test this? I JUST replaced the battery about one and a half years ago and the alternator I replaced only about 5ish months ago.
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#4
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
#5
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So I'm going to make an assumption that the problem is the battery? Thankfully mine has a 4 year warranty on it from Sams Club but here's the other thing my battery is not a AGM battery, does this matter? This is the exact battery I bought. Should I get a AGM battery instead? Does it make THAT big of a difference? Also if it matters last time I had my X5 into my personal mechanic (which was to replace the alternator and the alternator bracket) he said something about the programming of the car thinking it had a AGM battery in it so he switched it to think it has a normal battery in it.
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#6
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*edit* Unless your mechanic meant he somehow adjusted the alternator output to suit the new battery. AGM batteries require slightly less charging voltages than flooded cell batteries and a standard charge voltage of 2.4v per cell (14.4v total) as most cars charge at will overcharge an AGM battery in the long term. AGM is better of at 13.5v -13.8v for long term charging but the vehicle normal 14.4v is ok most of the time. Most folk seem to have no trouble when fitting an AGM battery to a car designed for flooded cell batteries (such as the E53 X5) but in a few cases where long driving is common, the life of the AGM battery may be shortened by overcharging.
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) Last edited by wpoll; 05-24-2017 at 07:16 PM. |
#7
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Safe bet is the battery is bad though? Should I switch it back to whats recommended aka a AGM battery?
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#8
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) |
#9
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I wouldn't waste time load testing that battery. Sorry to say, it's shot! If under 12 volts it is effectively dead and most likely the source of your issues. The alternator is trying to keep up but the battery isn't!
I would move back to an AGM if it were mine.
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'01 740i Sport MKIV, Quad Brake Lights, Bi-Xenon retrofit, HID Fogs Dinan 7 Struts, Springs, camber plates, Intake, MAF, CAI, Throttle Body, NBT Retrofit, Strong Strut '99 318ti Titanium Silver; '97 318ti Boston Green; '13 X5 3.5i Saphire Black Metallic '84 633csi Black (sold); '88 325iC Black (sold); '97 740iL Black(sold); '01 740iS Black (sold);'97 318ti White (sold); '08 X5 4.8i Titanium Silver (sold); '96 318ti Alaska Blue (sold) |
#10
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Okay so good and bad news. Good news is Sam's Club replaced the battery after testing it and it showing it was bad. Bad news is all the issues are still there, still no Nav/Radio, still no turn signal indicators or fog light indicators.
Here's the weird thing though. As I was driving I was stuck at a red light for about 2-3mins and while I was there sitting I was pressing the fog light button, radio button, turn signal stock, etc. trying to test it all out but with nothing happening. Then for a split second or two everything kicked on and on the screen on the dash something that had to of been in German popped up but I have no idea what it said besides that it started with a N and then after a second everything shut back off again. Any ideas as to what to check next?
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