RomRaider

Does anyone know (maybe someone that has gone through the disassembly / logic) if there is code / a routine to perform a free air calibration for the front O2 at a set time? I ask because I notice only 4 wires are used toward the "wideband" sensor and don't see any calibration resistor in the connector / any way for the ECU to see that, ergo how it keeps a good reference for stoich?

Thanks!