Diagnostic Method
Measure the pressure values when the enable conditions are established, and perform diagnosis by calculating those results.
- Label the intake manifold pressure value as PMOF1, which is observed when enable conditions are established, and set the EGR target step to 50 step(s) (nearly full open).
- Label the intake manifold pressure value as PMON, which is observed after 1500 ms has passed since EGR target step was set to 50 step(s) (when the enable conditions were established), and set the EGR target step to 0.
- Label the intake manifold pressure as PMOF2, which is observed after 1500 ms has passed since EGR target step was set to 0 (after (1500 ms + 1500 ms) have passed since the enable conditions were established).
- Abnormality Judgment
Judge as NG when the following conditions are established.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| PMON - (PMOF1 + PMOF2)/2 | < 1.6 kPa (11.8 mmHg, 0.5 inHg) |
Time Needed for Diagnosis: 1 time
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| PMON - (PMOF1 + PMOF2)/2 | ≥ 1.6 kPa (11.8 mmHg, 0.5 inHg) |
Time Needed for Diagnosis: 1 time