SFI SYSTEM > DEFINITION OF TERMS |
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Terms | Definition |
Monitor Description | Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and details). |
Related DTCs | Group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
Typical Enabling Condition | Preconditions that allow the ECM to detect malfunctions. With all preconditions satisfied, the ECM stores a DTC when monitored values exceed the malfunction thresholds. |
Sequence of Operation | Order of monitor priority. Applied if multiple sensors and components are involved in a single malfunction detection process. Each sensor and component is monitored in turn when the previous detection operation is completed. |
Required Sensor/Components | Sensors and components used by the ECM to detect each malfunction. |
Frequency of Operation | Number of times the ECM checks for each malfunction during each driving cycle. "Once per driving cycle" means the ECM only performs checks for that malfunction once during a single driving cycle. "Continuous" means the ECM performs checks for that malfunction whenever the enabling conditions are met. |
Duration | Minimum time for which the ECM must detect continuous deviation in monitored values in order to store a DTC. Timing begins when the Typical Enabling Conditions are met. |
Malfunction Thresholds | Beyond this value, the ECM will conclude that there is a malfunction and store a DTC. |
MIL Operation | Timing of the MIL illumination after a malfunction is detected. "Immediate" means the ECM illuminates the MIL as soon as a malfunction is detected. "2 driving cycles" means the ECM illuminates the MIL if the same malfunction is detected a second time during the next sequential driving cycle. |