Retrieve/Clear Continuous Memory DTCS: Description

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Retrieve/Clear Continuous DTCs is a functional test of PCM. DTCs can be retrieved or cleared with ignition on and engine off, or engine running. Unlike KOEO and KOER self-tests, which can only be activated on demand, Continuous Monitor is always active in monitoring the system. When a fault is detected, a DTC will be stored in memory to be retrieved at a later date, making it possible to diagnose intermittent faults. For vehicles with California emissions, DTC P1000 may be only DTC displayed, indicating an incomplete OBD-II drive cycle (more drive time needed). For additional drive cycle information, see DRIVE CYCLE PROCEDURE under ADDITIONAL SYSTEM FUNCTIONS. Injector Driver Module (IDM) stores both history and hard IDM DTCs. To retrieve IDM DTCs, you must run KOEO ON-DEMAND SELF-TEST or KOEO INJECTOR ELECTRICAL SELF-TEST . The only way to clear IDM DTCs is to clear Continuous Memory even though IDM DTCs do not show up on continuous display.