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Term | Definition |
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Monitor description | Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details). |
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Related DTCs | Group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
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Typical enabling conditions | Preconditions that allow the ECM to detect malfunctions.
With all preconditions satisfied, the ECM stores the DTC when the monitored value(s) exceeds the malfunction threshold(s). |
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Sequence of operation | The priority order that is applied to monitoring if multiple sensors and components are used to detect the malfunction.
While
a sensor is being monitored, the next sensor or component will not be
monitored until the previous monitoring has concluded. |
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Required sensors/components | The sensors and components that are used by the ECM to detect malfunctions. |
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Frequency of operation | The number of times that the ECM checks for malfunctions per driving cycle.
"Once per driving cycle" means that the ECM checks for the malfunction only one time during a single driving cycle.
"Continuous" means that the ECM checks for the malfunction every time the enabling conditions are met. |
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Duration | The
minimum time that the ECM must sense a continuous deviation in the
monitored value(s) before storing a DTC. This timing begins after the
"typical enabling conditions" are met. |
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Malfunction thresholds | Beyond this value, the ECM will conclude that there is a malfunction and store a DTC. |
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MIL operation | MIL illumination timing after a defect is detected.
"Immediately" means that the ECM illuminates the MIL the instant the ECM determines that there is a malfunction.
"2 driving cycles" means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd driving cycle. |
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Component operating range | Normal operation range of sensors and solenoids under normal driving conditions.
Use these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not. |
