Diagnostic Method
WARNING: This page is about a different variant/trim than selected.
Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.
- Abnormality Judgment
Compare the diagnostic value (fsobd) with the threshold value, and if a condition meeting the malfunction criteria below continues for 10 s x 5 time(s) or more, judge that there is a fault in the fuel system.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flaf | ≤ Value from Map 2 |
| In this case: sglmd = measured lambda | |
| tglmda = target lambda | |
| faf = main feedback compensation coefficient (every 64 milliseconds) | |
| flaf = main feedback learning compensation coefficient |
MAP 2
| Amount of air (g (oz)/s) | 0 (0) | 3.2 (0.11) | 6.4 (0.23) | 9.6 (0.34) | 12.8 (0.45) | 16 (0.56) | 19.2 (0.68) |
| fsobdL1 (%) | 1.4 | 1.4 | 1.332 | 1.25 | 1.25 | 1.25 | 1.25 |
Time Needed for Diagnosis: 10 s x 5 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| fsobd = (sglmd - tglmda) + faf + flaf | < 1.15 |
Time Needed for Diagnosis: 10 s