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BMW battery discharge

  • 23-01-2019 2:06pm
    #1
    GGHFG
    Registered Users, Registered Users 2 Posts: 4 ✭


    Afternoon folks, have a e90 3 series with a recurring problem. When the car is left unlocked I get a warning on the dash with cc-id 415 which from my research is battery discharge rate high. Im assuming something is drawing current.
    Before anyone asks the battery is new and coded,new ibs, doing over 400 miles a week and the battery is on a trickle charger if the car goes a few days without any use.

    The only other problem the car has is when you push the button on the heater control for the windscreen the flap isn't opening but the heater is working fine on all the other settings.
    Sorry for the long essay but any help would be greatly appreciated!


Comments

  • #2
    PaddyFagan
    Registered Users, Registered Users 2 Posts: 1,146 ✭✭✭PaddyFagan


    Check the connections to the rear light clusters, particularly the earth connection. It’s a common problem in that era of BMWs - my old e60 had on going issues for years until some work got done on the rear clusters.

    Paddy

    Ps of course it could be almost any other electrical system in the car!


  • #3
    V1
    Registered Users, Registered Users 2 Posts: 54 ✭✭V1


    Possibly a long shot but your heater issue gave me a clue.
    There are 2 recent recalls on the e90. One for the battery isolation thingy but the other is for an electrical issue with the heater controls. The second has been linked to vehicle fires.
    Have you had these done?
    Might be worth a call to a dealer.


  • #4
    irish bloke
    Registered Users, Registered Users 2 Posts: 2,057 ✭✭✭irish bloke


    I know you said new ibs, but you should disconnect it again to see will issue go away. Disconnected mine 3 years ago and never had an issue again and still on the same battery


  • #5
    GGHFG
    Registered Users, Registered Users 2 Posts: 4 ✭GGHFG


    Thanks for the replies.

    Will go through the car tomorrow and see if I can find something not right with an electrical part.

    It went back for the two recalls so I don't think its that

    Will pull the two plugs on the ibs and see does it go away


  • #6
    timple23
    Registered Users, Registered Users 2 Posts: 1,001 ✭✭✭timple23


    Have you an aux cord or a phone charger plugged in? (But not plugged into phone) If you do pull them out of aux port/12v supply, see if that does it.

    Not fully sure, but when you don't lock the car, the car doesn't fully go into sleep mode, I think, I am not certain.

    I had a high battery discharge and it was caused by having aux left plugged in rear center.


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