Diagnostic Method
- Abnormality Judgment
Judge as NG when Low side or High side becomes NG.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
JUDGMENT VALUE REFERENCE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Output voltage | < 1.47 V |
| Engine speed | ≥ 2000 rpm |
| Throttle opening angle | ≥ 12° |
| Intake manifold pressure | ≥ 66.7 kPa (500 mmHg, 19.7 inHg) |
| High (1) | |
| Output voltage | ≥ 2.66 V |
| Engine speed | 550 rpm - 900 rpm |
| Throttle opening angle | < 3.51 ° |
| Intake manifold pressure | ≥ 40 kPa (300 mmHg, 11.8 inHg) |
| High (2) | |
| Output voltage | ≥ 1.37 V |
| Engine speed | 550 rpm - 900 rpm |
| Throttle opening angle | < 3.51 ° |
| Intake manifold pressure | ≥ 40 kPa (300 mmHg, 11.8 inHg) |
| Fuel system diagnosis | Rich side malfunction |
Time Needed for Diagnosis:
Low: 5000 ms
High: 10000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG when both Low side and High side become OK.
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 REFERENCE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Output voltage | ≥ 1.47 V |
| Engine speed | ≥ 2000 rpm |
| Throttle opening angle | ≥ 12° |
| Intake manifold pressure | ≥ 66.7 kPa (500 mmHg, 19.7 inHg) |
| High | |
| Output voltage | < 2.66 V |
| Engine speed | 550 rpm - 900 rpm |
| Throttle opening angle | < 3.51 ° |
| Intake manifold pressure | < 40 kPa (300 mmHg, 11.8 inHg) |
| Fuel system diagnosis | Rich side normal |
Time Needed for Diagnosis:
Low: Less than 1 s
High: Less than 1 s