Diagnostic Method
- Abnormality Judgment
Judge that the fuel system malfunction occurs when the time during completing the malfunction criteria below continues 30 seconds or more by comparing the diagnosed value (fsobd) with threshold value.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flaf where, sglmd = measured lambda |
>/= fsobdL1 See THRESHOLD VALUE FUEL SYSTEM MALFUNCTION CRITERIA SPECIFICATION |
| tglmda = target lambda | fsobdL1 = lean side threshold value of fsobd |
| faf = main feedback compensation coefficient every 64 milliseconds | |
| flaf = main feedback learning compensation coefficient |
Map 4 Threshold value for fuel system malfunction criteria
THRESHOLD VALUE FUEL SYSTEM MALFUNCTION CRITERIA SPECIFICATION
| Amount of air (g/s) | 0 | 2.4 | 4.7 | 7 | 9.4 | 11.7 | 14.1 |
| fsobdL1 (%) | 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 OK when the malfunction criteria below are continued for 10 seconds.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flaf | < 19% |