Diagnostic Method
An NG judgment shall be returned if the following conditions are formed after at least 5 seconds of continuous time has elapsed.
An OK judgment shall be returned, and the NG result shall be cleared, if the following conditions are not formed after at least 5 seconds of continuous time has elapsed.
Judgment Value
MALFUNCTION CRITERIA AND THRESHOLD VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| Average of fuel trim parameter based on a secondary oxygen sensor | >/= 0.025 |
| Count of limits moving to rich | >/= 4 counts |
| Ratio of time for oxygen sensor upper or lower to time or rich time/lean time | </= 9 (AT model) </= 5.7 (MT model) |
Time Needed for Diagnosis: 300 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous drive cycles.