Quote:
Originally Posted by EIP11
Not my onboard computer has began to tell me that my headlights, fog lights, and tag light is out and need to be checked. Does this sound like a bad LCM?
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start with the battery - a dying battery sends out "fluids" that wake up electrical gremlins in the E53... your headlights might work on their own, like just the left one, or the fog turns on by itself, or a window starts rolling down by itslef...
as the modules are underpowered, they send out iBus telegrams that make no sense, but those nonsense telegrams are read out by other, alive modules and the commands are exectuted, regardless of how stupid they are... most of the electrical equipment in these cars can be activated or deactivated by the iBus telegrams, like the seat positions, A/C activation, windows or the lights...
start with the battery... then move on to the next issue on the complexity ladder