Theory Of Operation

When powered, the CAN bus ignition status is IGN_RUN, and the Occupant Classification Module (OCM) is configured for a Driver Seat Track Position Sensor (STPS), the Occupant Classification Module (OCM) diagnoses the internal and external circuits to verify system performance. The fault occurs when the sensor circuit A/D feedback register is below the battery voltage limit but not shorted low (as specified by calibration) for 500 ms ± 110 ms.