Diagnostic Method
- Abnormality Judgment
Judge as NG if the continuous time while the following criteria are met exceeds the determined time.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| (Low side NG) | |
| Output voltage | < 1.5 V |
| Engine speed | ≥ 2500 rpm |
| Throttle opening angle | ≥ 15° |
| Intake manifold pressure | ≥ 53.3 kPa (400 mmHg, 15.7 inHg) |
| High side NG (1) | |
| Output voltage | ≥ 1.95 V |
| Engine speed | 600 ↔ 900 rpm |
| Throttle opening angle | < 4.1° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| High side NG (2) | |
| Output voltage | ≥ 1.7 V |
| Engine speed | 600 ↔ 900 rpm |
| Throttle opening angle | < 4.1° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| Fuel system diagnosis | Rich side malfunction |
Time Needed for Diagnosis:
DIAGNOSIS CHART
| Low side | 3 seconds |
| High side | 10 seconds |
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK if the criteria below are met.
Judgment Value
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| (Low side NG) | |
| Output voltage | ≥ 1.5 V |
| Engine speed | ≥ 2500 rpm |
| Throttle opening angle | ≥ 15° |
| Intake manifold pressure | ≥ 53.3 kPa (400 mmHg, 15.7 inHg) |
| (High side NG) | |
| Output voltage | < 1.95 V |
| Engine speed | 600 ↔ 900 rpm |
| Throttle opening angle | < 4.1° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| Fuel system diagnosis | Rich side normal |