5/11/2023 0 Comments Aldl commodore software library![]() ![]() ![]() Bit banging is a method to transmit serial data using only software rather than a hardware UART. The ECM uses a ‘bit-banging’ technique on the CEL (Check Engine Light) wire to flash data out bit by bit. It operates at 160 baud and is a uni-directional (read only) data link. There are a few different implementations of ALDL VN/VP – This was the first implementation, was also the most basic and is the only implementation that uses ALDL for purely diagnostic purposes. ![]() It is used for a variety of things from, as the name suggests, initial system testing when the vehicle is manufactured to vehicle module communications to diagnostics at the dealer/home to real-time tuning. ![]()
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