Readiness Test Status

READINESS TEST STATUS

As for the major diagnostic items listed below, the ECM stores in its memory whether or not they have ever completed the respective drive cycle tests successfully.
The stored data can be read out by means of a scan tool. (In case of an MUT-II, the message "Complete" is displayed if an item has undergone its particular drive cycle test.) This data will all be cleared if the battery terminal is disconnected or DTC erasion is carried out.
To complete the readiness test status which has been reset, the "OBD-II Drive Cycle" related to a diagnosis item should be carried out.

NOTE: If the vehicle is normal, the readiness test status will be complete by carrying out the "OBD-II Drive Cycle" once. If the ECM detects a malfunction of the vehicle, the readiness test status will be complete by carrying out the "OBD-II Drive Cycle" twice. In addition, after all readiness test statuses are complete, a DTC should be interrogated.
If a DTC is stored, perform repair by referring to the relevant DTC procedures. Then complete the readiness test status by repeating the "OBD-II Drive Cycle".
If a DTC is not stored, no further action will be needed.
- Catalyst: P0421, P0431
- Evaporative system: P0442, P0455
- Heated oxygen sensor: P0130, P0136, P0150, P0156
- Heated oxygen sensor heater: P0135, P0141, P0155, P0161
- EGR system: P0400