As such the BMW is not dierctly compatible with RS232, either in baud or signalling levels, and could damage your PC’s RS232 port if directly connected. L line is some sort of RTS/DTS line that wakes up the modules on older cars. The K line is a bi-directional serial bus with a 10.4kbaud data rate. share it here and wish this helps!īMW uses a KKL system on the 90’s cars. This is a real customer review on INPA working on 1999 BMW E46, who managed to read fault codes, live engine statistics on a per cylinder basis and reset engine adaptations after repairs, using cheap USB interfaces.īelow is all what he said in a BMW forum.
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