Back to Forum
Post a Response
    Re: BMW 523 1998 E39 TELL TALE LIGHTS Archived Message

    Posted by Sean Mc Gettigan on September 30, 2008, 11:48 am, in reply to "Re: BMW 523 1998 E39 TELL TALE LIGHTS"

    Hi Phil, the tell tale lamps are controlled by the LCM via the K or I data bus (depends on high or basic spec).The most common problem for what you have is that the data bus is locked by one of the attached ECUs and the info is not getting from the LCM to the dash.Which modules have any faults stored or wont comm?
    As Steve said you can try a reset but this will normally only be a temp fix,best to scope the data bus and disconnect each connected ECU one at a time(only need to disconnect the ECU plug with the data bus) until the bus comes alive again and then check the tell tales.
    Test all electrical functions (wipers.locks,radio etc) on the car as it is and see if you can find something else not working + that can get you a starting point for disconnecting.
    Hth Sean

    Message Thread:


Copyright © uk autotalk