Diagnostic Method 1
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Detect the malfunction by checking "Cumulative value of time when λ changes from lean → rich" in comparison to "Time during which diagnosis is in progress".
Judge as NG when the following conditions are established.
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| (Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) | < 0.39 | P014C and P014E |
| and | ||
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean | > 30 ms | |
| (Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) | > 0.61 | P014D and P014F |
| and | ||
| Average value of time necessary for λ to inverse the air fuel ratio to Rich → Lean → Rich | > 30 ms |
Time needed for diagnosis: 90000 ms
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.