4X4 Light On only - HELP!!!!

[Qsilver7]

Before ruling out low battery voltage (since your new battery is also below 0% state of charge)...if you have a battery charger...hook it up to the jump start terminals in the engine bay. Give your new battery a good long recharge like 2 amps for approx 20 hours, or 10 amps at approx 8 hours.

Also make sure that all the battery cells are sufficiently filled with electrolyte (distiller water).

[Buguyed]

Originally Posted by Qsilver7

Before ruling out low battery voltage (since your new battery is also below 0% state of charge)...if you have a battery charger...hook it up to the jump start terminals in the engine bay. Give your new battery a good long recharge like 2 amps for approx 20 hours, or 10 amps at approx 8 hours.

Also make sure that all the battery cells are sufficiently filled with electrolyte (distiller water).

Sunday I checked fluids on new battery, all is good. Then Unplugged the battery for 1.5 hours to hopefully reset anything. Then hooked all back up.
I don't have a battery charger so got some jumper cables and ran from my E46 (Has 13.6 volts off and 14.2 running) to the E53. With cables in place and the X off, it was getting 13.4 volts at the OBC. Running it was at 13.8. Did this for about 30 ish minutes. (I ran cables to connector under the hood and not battery direct).
Afterwards I tried the steering wheel turn lock to lock a couple times and went for a drive. Seeing 13.8 on the OBC the entire drive. Light still present as ever...

[Qsilver7]

Originally Posted by Buguyed

Sunday I checked fluids on new battery, all is good. Then Unplugged the battery for 1.5 hours to hopefully reset anything. Then hooked all back up.
I don't have a battery charger so got some jumper cables and ran from my E46 (Has 13.6 volts off and 14.2 running) to the E53. With cables in place and the X off, it was getting 13.4 volts at the OBC. Running it was at 13.8. Did this for about 30 ish minutes. (I ran cables to connector under the hood and not battery direct).
Afterwards I tried the steering wheel turn lock to lock a couple times and went for a drive. Seeing 13.8 on the OBC the entire drive. Light still present as ever...

Since your battery voltage isn't low after replacing and charging up your new battery...plus driving around seeing that the alternator/charging system is working...and your 4x4 warning light is still illuminated...the next step is to communicate with the vehicle (BMW DIS/GT-1) to see which sensor is setting a fault for the 4x4 warning.

The 4x4 warning light does have a purpose...it lets' us know when something is wrong with xDrive...as well as illuminating when we manually turn DSC off. Just to check, the DSC button wouldn't happen to be pressed in or stuck from a spilt sugary drink etc?

BTW...just to be sure, your battery warning light is NOT illuminating while driving or staying illuminated, right? I ask because the battery warning light comes on to let you know when the alternator/charging sytem is NOT keeping your battery charged...and thus is the culprit for electronic problems (the battery is the VICTIM in this case, not the culprit).

[Buguyed]

The battery light never has never been illuminated. Here is my dash currently:



Also, I recently noticed there is a small scuff on the physical DSC button. Like someone hit it with a ring or knife maybe? The DSC worked fine for the first couple months of owning the car.

I'll see if my wife can send a pic of the scuff on the button and i'll post it.

[Buguyed]

Here is a pic of the scuffed button... Thoughts?