Toyota Yaris: Sfi System / Definition Of Terms

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.

Duration

The minimum time for which the ECM must detect a continuous deviation in the monitored value(s) in order to store a DTC. Timing begins after the "typical enabling conditions" are met.

Typical Malfunction Thresholds

Value beyond which the ECM will determine that there is a malfunction and store a DTC.