Toyota Corolla Repair Manual: Definition of terms

Toyota Corolla Repair Manual / Diagnostics / Sfi system / Definition of terms

Term	Definition
Monitor description	Description of what the ecm monitors and how it detects malfunction (monitoring purpose and its details).
Related dtcs	Diagnostic code
Typical enabling condition	Preconditions that allow the ecm to detect malfunction. 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 malfunction.
Frequency of operation	The number of times that the ecm checks for malfunction 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.
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 malfunction and set a dtc.
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 malfunction. 2 Driving cycle” means that the ecm illuminates the mil if the same malfunction is detected again in the 2nd driving cycle.

Data list/active test

1. Data list Hint: using the data list displayed by the hand–held tester or the obd ii scan tool, you can read the value of the switches, sensors, actuators and so on without parts removal. Readi ...

Toyota/lexus part and system name list

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

Other materials:

Inspection procedure
1 Check d squib circuit(airbag sensor assy center – horn button assy) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds. disconnect the connectors between the horn button assy and the airbag sensor assy center. for the orange c ...

Replacement
Hint: components: 1. Table of bolt, screw and nut Notice: be sure to tape the tip of the screwdriver when using it to disengage the meshing of the clips and claws. Hint: indicate the bolts, screws and nuts, which are necessary for installation and removal of the instrument panel, in th ...

Dtc check/clear
Notice: if there is no dtc in the normal mode, check the pending fault code using the continuous test results function (mode 7 for sae j1979) on the obd ii scan tool or the hand–held tester. Hand–held tester only: when the diagnosis system is switched from the normal mode to the chec ...