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active steering malfunction

Discussion in 'E60 (2004-2010)' started by udris, Jun 27, 2013.

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    udris

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    i have a 545 with the Sport Package including active steering. I get an active steering/dynamic handling error light(s), dealer performed voltage check , all OK, but problem persists.
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    charlson89

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    There could be many things causing this light to come on. You will need to get the codes pulled in order to get a proper diagnosis I hate to say. You could have issues from your battery to the active sway bar, steering angle sensor. What did the dealer check exactly and did they pull faults for you?
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    udris

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    The dealer performed a short test, finding multiple over and under voltage faults. They checked alternator and that was within tolerances, reinitialized active steering and charged the battery and sent me on my way. They performed a draw test overnight and that passed muster. The same fault showed up within 24 hours of getting the vehicle back.
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    charlson89

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    Your alternator might be overcharging the system causing it to go into protection mode. Basically if voltage goes over a certain range the control units will shut down to protect them selves. If you have a multi meter that has the min/max function. Connect the meter to the battery positive of the meter to positive battery terminal. Negative lead to negative battery terminal. Then set the meter to read DC voltage and turn on the min/max function on and drive the vehicle around until the active steering light comes on then check the meter and see if you do have a high charging voltage. Range should be around 13v-15.5v for a normal car over that and you have an issue and need to replace the alternator.

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