The TRo2 has red status LEDs for each channel. When powered, the LEDs blink at a slow rate until the corresponding sensor has reached normal operating temperature. After installation, the TRo2 requires free air calibration. This should be done with the sensors dangling in free air. The environment must be free of hydrocarbon vapors. It is suggested that the free air calibration be performed outdoors.
The displacement and injector size can be set if modifications were done that adjusts these values. This is very handy because if the injectors are changed later, the software can quickly input the new size and it will compensate for larger injectors or a big bore kit.