Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Definition Of Terms

DEFINITION OF TERMS

Term

Definition

Monitor description

Description of what the TCM monitors and how it detects malfunctions (monitoring purpose and details).

Related DTCs

Group of diagnostic trouble codes that are output by the TCM based on the same malfunction detection logic.

Typical enabling condition

Preconditions that allow the TCM to detect malfunctions.

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

Sequence of operation

The priority order that is applied to monitoring if multiple sensors and components are used to detect the malfunction.

While one sensor is being monitored, the next sensor or component will not be monitored.

Required sensor/Components

The sensors and components that are used by the TCM to detect malfunctions.

Frequency of operation

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

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

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

Duration

The minimum time for which the TCM 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 TCM will determine that there is a malfunction and store a DTC.

MIL operation

MIL illumination timing after a malfunction is detected.

"Immediate" means that the TCM illuminates the MIL the instant the TCM determines that there is a malfunction.

"2 driving cycles" means that the TCM illuminates the MIL if the same malfunction is detected again in the next driving cycle.

Component operating range

Normal operation range of sensors and solenoids under normal driving conditions.

Use these ranges as a reference.

The ranges cannot be used to judge if a sensor or solenoid is defective or not.

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