The ME platform features the ability to switch between two sets of ignition, fuel and boost maps on the fly, using a toggle switch which can be mounted on the dash. You can also set the source for the switching, either Digital Pin (such as Digital Input which has been set to "Map Switch" in IO settings), or an Analog Button (such as one set to Analog Button 1,2,3 in the Analog Input settings), or as VVT (to trigger a map switch when VTEC becomes active).


You can choose whether to switch all maps to second tables, or just specific maps, such as ignition only, if running a different octane of fuel. The configuration driver is shown below, and it can be found under the ‘System’ node:

Ensure you enable it, as well as select the correct switch state, and set the maps you would like to switch, such that with the switch armed, the ‘Sel. Map’ indicators show the correct map that will be used in that state.


Note that on Plug-In ECUs, you would generally use a spare Digital Input on the MAC Connector - running a wire from the chosen Digital Input through a switch to ground. Then in the IO settings the chosen ‘Dig In’ pin  should be set to Map Switch.


Please refer to the Hardware Install Guide for your specific model if you have a Plug-In system, or the general ME100/ME221/ME442 Wire In manual for the pin-outs if you are using a self wired system for details on the connectivity.


Example of wiring a toggle switch for switchable maps: