Diagnostic Method
Abnormality Judgment
Compare the diagnosed value (fsobd) with the threshold value, and if a condition where the malfunction criteria below are met continues for more than 50 seconds, judge that there is a fault in the fuel system.
Judgment Value
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + fan + flaf | ≥ fsobdL1 |
| where, | See MAP REFERENCE |
| sglmd = measured lambda | |
| tglmda = per target lambda | fsobdL1 = lean side threshold value of fsobd |
| fan = main feedback compensation coefficient every 64 milliseconds | |
| flaf = main feedback learning compensation coefficient |
Map 4 Threshold value for fuel system malfunction criteria
MAP REFERENCE
| Amount of air (g(oz)/s) | 0 (0) | 3.2 (0.113) | 6.4 (0.226) | 9.6 (0.339) | 12.8 (0.451) | 16 (0.564) | 19.2 (0.677) |
| fsobdL1 (%) | 40 | 40 | 33.2 | 26.5 | 26.5 | 26.5 | 26.5 |
Time Needed for Diagnosis: 10 seconds x 5 times
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Normality Judgment
Judge as OK when the malfunction criteria below are completed for 10 seconds or more.
Judgment Value
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + fan + flat | < 19% |