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 30 seconds, judge that there is a fault in the fuel system.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + fan + flaf | ≤ sobdR1 |
| where, | Refer to MAP 4 THRESHOLD VALUE SPECIFICATION Map 4. |
| sglmd = measured lambda | fsobdR1 = rich side |
| tglmda = target lambda | 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 4 THRESHOLD VALUE SPECIFICATION
| Amount of air (g(oz)/s) | 0(0) | 2.4 (0.085) | 4.7 (0.166) | 7 (0.247) | 9.4 (0.332) | 11.7 (0.413) |
| fsobdR1 (%) | -40 | -40 | -36.9 | -32.0 | -27.0 | -27.0 |
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 continues for 10 seconds.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + fan + flat | ≥ -20% |