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Toyota Corolla Repair Manual: Definition of terms

Term

Definition

Monitor description Description of what the ecm monitors and how it detects malfunctions (monitoring purpose and its details).
Related dtcs Diagnostic code
Typical enabling condition Preconditions that allow the ecm to detect malfunctions.

With all preconditions satisfied, the ecm sets the 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 another sensor is being monitored, the next sensor or component will not be monitored until the previous monitoring has concluded.

Required sensor/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 malfunction only one time during a single driving cycle.

Continuous means that the ecm detects malfunction every time when enabling condition is met during a single driving cycle.

Duration The minimum time that the ecm must sense a continuous deviation in the monitored value(s) before setting a dtc. This timing begins after the typical enabling conditions are met.
Malfunction thresholds Beyond this value, the ecm will conclude that there is a malfunction and set a dtc.
Mil operation Mil illumination timing after a defect is detected.

Immediately means that the ecm illuminates mil the instant the ecm determines that there is a malfunction.

2 Driving cycle means that the ecm illuminates mil if the same malfunction is detected again in the 2 nd driving cycle.

Data list/active test
1. Data list Hint: according to the data list displayed by the obd ii scan tool or handheld tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Readin ...

Part and system name list
This reference list indicates the part names used in this manual along with their definitions. ...

Other materials:

Favorites list setting
Up to 15 contacts (maximum of 4 numbers per contact) can be registered in the favorites list. ■ Registering the contacts in the favorites list 1 Select Add Favorite. 2 Select the desired contact to add to the favorites list. Dimmed contacts are already stored as a favorite. 3 Check th ...

Dtc check/clear
1. Dtc check (normal mode) Notice: handheld tester only: when the diagnostic system is switched from the normal mode to the check mode, all the dtcs and freeze frame data recorded in the normal mode will be erased. So before switching modes, always check the dtcs and freeze frame data, and n ...

Steering column
Preparation Sst Recomended tools Equipment ...

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