•  This shows the OBD systems operating status. If any monitor function is incomplete, the M-MDS will identify which monitor function has not been completed. The Fuel system, Misfire and CCM are continuous monitoring-type functions. The A/F sensor, HO2S, EGR system and catalyst will be monitored under drive cycles. The OBD diagnostic system is initialized by performing the DTC cancellation procedure or disconnecting the negative battery cable.