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) | < 0.22 | P014C |
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean | > 30ms | |
| Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) | > 0.7 | P014D |
| Average value of time necessary for λ to inverse the air fuel ratio to Rich → Lean → Rich | > 10ms |
Time needed for diagnosis: 70000ms
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
6. DIAGNOSTIC METHOD 2
Detect the malfunction by the cumulative value obtained from the amount of variation in λ change.
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Cumulative value obtained from the amount of variation in λ change | < Value from Map | P014C and P014D |
Map
MAP SPECIFICATION (AT MODEL)
| Cumulative value obtained from the amount of variation in λ | 0.00 | 3.50 |
|---|---|---|
| Cumulative value obtained from the amount of variation in λ change | 0.00 | 3.50 |
MAP SPECIFICATION (MT MODEL)
| Cumulative value obtained from the amount of variation in λ | 0.00 | 3.50 |
|---|---|---|
| Cumulative value obtained from the amount of variation in λ change | 0.00 | 3.50 |
Time needed for diagnosis: 70000ms
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.