720° Interval Difference Method
DIAGNOSTIC VALUE CHART
| Diagnostic value | domg 720 = (omg 1 - omg 0) - (omg 5 - omg 4) |
| Misfire judgment | domg 720 > Judgment value → Judge as misfire |
- FTP 1.5 times misfire (Misfire occurrence level which influences exhaust gas)
- Abnormality Judgment
Judgment Value (Judge that malfunction occurs when the misfire ratio is high in 1000 engine revs.)
JUDGMENT VALUE REFERENCE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| FTP emission judgment value | ≥ 20 x 100/2000% in 1000 revs. |
Time Needed for Diagnosis: 1000 engine revs.
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
JUDGMENT VALUE REFERENCE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| FTP emission judgment value | < 20 x 100/2000% in 1000 revs. |
Time Needed for Diagnosis: 1000 engine revs.
- Catalyst damage misfire (Misfire occurrence level damaging catalyst)
- Abnormality Judgment
JUDGMENT VALUE REFERENCE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Catalyst damage misfire judgment value | ≥ Value of Map 3 |