The multiplexer is an ECU serial stream which communicates with the rest of the vehicle.
The operation of the multiplexer can be set by the Multiplexer option:
Normal - Normal multiplexer operation.
Disabled - Engine swap applications.
Lotus (2005-2007) - Honda/Lotus engine swap applications using the ECU multiplexer output.
Lotus (2008+) - Honda/Lotus engine swap applications using the ECU multiplexer output.
Datalogger (9,600 bps) - Serial output for dataloggers at 9,600 bps (race cars only).
Datalogger (115,200 bps) - Serial output for dataloggers at 115,200 bps (race cars only).
Additional options are available for Lotus ECU to dash interfaces:
Digital Outputs (KPro4)
See Serial Output
See CAN Output (Hondata & MoTeC), CAN Output (AiM) and Lotus Dash