On-Board System Readiness Test Mode: Description

All OBD scan tools should display the On-Board System Readiness (OSR) test. The OSR will display the supported monitors on the vehicle, the status of all monitors (complete or not complete) and the MIL status. If a monitor is not complete, the scan tool will not identify the monitor that has not completed. None of the typical OBD monitors such as catalyst, heated catalyst, evaporative system, secondary air, A/C, or the HO2S, apply to the 6.0L diesel. The values of the monitors are not used. Readiness for the 6.0L is reported based on the completeness of the Comprehensive Component Monitors (CCM) and the misfire monitor and the EGR monitor. These monitors must be complete before readiness can be cleared. It is not possible to determine which individual monitors are complete/incomplete.