Diagnostic Method 1
Detect the malfunction by checking "Cumulative value of time when A 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 - P014C
| Malfunction Criteria | Threshold Value |
|---|---|
| (Cumulative value of time when λ changes from lean - rich)/(Time during which diagnosis is in progress) Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean |
Less than 0.35 More than 8ms |
JUDGMENT VALUE SPECIFICATION - P014D
| Malfunction Criteria | Threshold Value |
|---|---|
| (Cumulative value of time when λ changes from lean - rich)/(Time during which diagnosis is in progress) Average value of time necessary for λ to inverse the air fuel ratio to Rich → Lean → Rich |
More than 0.7 More than 30ms |
Time needed for diagnosis : 90 s
Malfunction indicator light illumination : Illuminates when malfunction occurs in 2 continuous driving cycles.