Diagnostic Method
- Abnormality Judgment
Compare the diagnosed value (fsobd) with the threshold value, and if a condition of meeting the malfunction criteria below continues for 30 seconds or more, judge that there is a fault in the fuel system.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flat | ≥ fsobdL 1 |
| where, sglmd = measured lambda fsobdL1 = lean side |
See MAP 4 |
| tglmda = target lambda faf = main feedback compensation coefficient every 64 milliseconds flaf = main feedback learning compensation coefficient |
threshold value of fsobd |
Map 4 Threshold value for fuel system malfunction criteria
THRESHOLD VALUE
| Amount of air (g (oz)/s) | 0 (0) | 2.3 (0.081) | 4.7 (0.166) | 7 (0.247) | 9.4 (0.332) | 11.7 (0.413) | 14.1 (0.497) |
| fsobdL 1 (%) | 40 | 40 | 36.9 | 32.0 | 27.0 | 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 met for 10 seconds or more.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flaf | < 20% |