720° Interval Difference Method
| 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 MISFIRE RATIO IS HIGH IN 1000 ENGINE REVS.)
| Malfunction Criteria | Threshold Value |
|---|---|
| FTP emission judgment value | ≥ 18 x 100/2000% in 1000 revs. (PZEV AT model) ≥ 20 x 100/2000% in 1000 revs. (PZEV MT model) ≥ 30 x 100/2000% in 1000 revs. (except for PZEV model) |
Time Needed for Diagnosis: 1000 engine revs.
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| FTP emission judgment value | < 18 x 100/2000% in 1000 revs. (PZEV AT model) < 20 x 100/2000% in 1000 revs. (PZEV MT model) < 30 x 100/2000% in 1000 revs. (except for PZEV model) |
Time Needed for Diagnosis: 1000 engine revs.
- Catalyst damage misfire (Misfire occurrence level damaging catalyst)
- Abnormality Judgment
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Catalyst damage misfire judgment value | ≥ Value from Map 3 |
MAP 3 REFERENCE CHART
| Intake air (g(oz)/rev) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0.16 (0.01) | 0.28 (0.01) | 0.4 (0.01) | 0.52 (0.02) | 0.64 (0.02) | 0.76 (0.03) | 0.92 (0.03) | 1.1 (0.04) | ||
| Engine speed (RPM) | 700 | 100 | 100 | 100 | 100 | 90 | 80 | 64 | 48 |
| 1000 | 100 | 100 | 100 | 100 | 90 | 80 | 63 | 44 | |
| 1500 | 100 | 100 | 90 | 80 | 73 | 67 | 54 | 40 | |
| 2000 | 80 | 80 | 80 | 80 | 68 | 57 | 51 | 44 | |
| 2500 | 80 | 80 | 73 | 67 | 62 | 57 | 51 | 44 | |
| 3000 | 67 | 67 | 62 | 57 | 51 | 44 | 44 | 44 | |
| 3500 | 67 | 67 | 56 | 44 | 40 | 36 | 34 | 31 | |
| 4000 | 57 | 57 | 44 | 31 | 24 | 20 | 20 | 20 | |
| 4500 | 44 | 44 | 33 | 31 | 20 | 20 | 20 | 20 | |
| 5000 | 44 | 44 | 38 | 31 | 20 | 20 | 20 | 20 | |
| 5500 | 36 | 36 | 31 | 27 | 20 | 20 | 20 | 20 | |
| 6000 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | |
| 6300 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | |
Time Needed for Diagnosis: 200 engine revs.
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgment
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Catalyst damage misfire judgment value | < Value of Map 3 |
Time Needed for Diagnosis: 200 engine revs.