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Thank's for showing me some life under this thread. I already have the hardware to connect PC to 96 G20 diag link. The hardware layer is a RS232 to ISO9141 converter. Is is mainly changing the voltage levels of the bit stream at the PC to car voltage (12volts). Now I need software protocal info. This involves the bit rate and source (PC) and target (car ecu) addresses. Then I can write a Visual Basic program to run on the PC to comunicate to the car's ecu.
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