Diagnostic Method 1
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) and Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean |
< 0.38 | P014C |
| > 0.01 s | ||
| (Cumulative value of time when λ changes from Lean → rich)/(Time during which diagnosis is in progress) and Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean |
> 0.61 | P014D |
| > 0 s |
Time needed for diagnosis: 120 seconds
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.