The TCU can save up to 4 different tuning maps with a Map selection switch. This switch can be calibrated in the software. It is also a digital switch that is converted to analog signal with resistors. Note that Orion has a 1 K pull-up resistor built into the OT01-P1 and OT02-P1 harness. The hardware is also ECU capable and then do not require these resistors. If you use a different harness make sure to add the resistor to the 5 volt output on P1 Pin 9.
See the wiring diagram Below.
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