Diagnosis 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
THRESHOLD VALUE SPECIFICATION - P014C
| Malfunction Criteria | Threshold Value |
|---|---|
| (Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) and | Less than 0.4 |
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean | More than 10 ms |
THRESHOLD VALUE SPECIFICATION - P014D
| Malfunction Criteria | Threshold Value |
|---|---|
| (Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) and | More than 0.6 |
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean | More than 10 ms |
Time needed for diagnosis: 120 s
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.