Turn and lights control stalk
Normally Turn and light control stalks have individual wires for each
function controlling each circuit. However in case of what Honda/Acura had done
is to bring everything into a microprocessor control board where each of the
functions is then coded and transmitted over slow speed single wire CAN bus into
MICU and relay control boards.
MICU is integrated into cabin fuse box where another microcontroller then
decodes some of those signals and as example triggers turn flashers. Relay
control board is part of engine bay fuse box and control things like lights and
wipers.
.... more to come...
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