Continuous Memory
WARNING: This page is about a different car, the 2004 Ford Pickup Heritage. However, it is still accessible from the selected car via links, so may be relevant.
The Continuous Memory Self-Test is functional test of the alternative fuel system performed by the alternative fuel control module (AFCM). This test is carried out under any condition (engine running or off) with the key on. This test will detect failures contributing to driveability or emission concerns. A system fault does not need to be present at the time of testing and is therefore valuable when diagnosing intermittent faults. When a fault is stored in memory, a DTC will be transmitted on the data link at the end of the test.
Any scan tool that meets OBD requirements can access Continuous Memory to retrieve emission related MIL DTC's.