2011 LR4/RRS 5.0 Charging System Fault at ~60mph

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Adrien

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Aug 22, 2019
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Seattle, WA
Hello!

I replaced my alternator about 3 months ago and the power output has been almost completely consistent and up to par. However, I noticed when the vehicle is held at a speed around 60mph for an extended time the "Charging System Fault" message appears for 1-2 seconds and then turns off. This will happen occasionally during longer drives and only about once per drive. After digging I found that when this message appears the voltage output drops to about 13v for the duration of the error message and then quickly raises back to the normal 14.2-14.6v range. Seeing as the alternator is fairly new, could this be an issue with the battery? Is there another voltage regulator that is not built into the alternator itself?
Any help on this would be fantastic as I don't want to run the risk of damaging any components!

Thank You!! :)


Adrien
 

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