SFI SYSTEM DEFINITION OF TERMS

Term Definition
Monitor Description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and details).
Typical Enabling Conditions

Preconditions that allow the ECM to detect malfunctions.

With all preconditions satisfied, the ECM stores a DTC when the monitored value(s) exceeds the malfunction threshold(s).

Required Sensors/Components The sensors and components that are used by the ECM to detect malfunctions.
Frequency of Operation

The number of times that the ECM checks for malfunctions per driving cycle.

"Once per driving cycle" means that the ECM detects a malfunction only once during a single driving cycle.

"Continuous" means that the ECM detects a malfunction every time the enabling conditions are met.

Typical Malfunction Thresholds Value beyond which the ECM will determine that there is a malfunction and stores a DTC.
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.