Diagnostic Method
Calculate the Max. value (delflmax) and cumulative value (sumfl) of output voltage variation of fuel level sensor during 12.2 seconds. Judge it normal when both max. and cumulative values are not over the threshold value. Otherwise, when either of them is over the threshold value, the diagnosis counter counts up. Judge as NG if the counter indicated 4 counts.
Abnormality Judgment
Judge as NG when the malfunction criteria below are met.
Judgment Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Integrated times of the condition reaching follows, DELFLMAX 0.27 ← → 0.894 V or SUMFL ≥ 25.92 V At that time, DELFLMAX: Maximum difference of sensor output for 12.2 seconds; SUMFL: Integrated value of the sensor output deviation for 12.2 seconds |
≥ 4 times |
The diagnosis counter does not count up when the following conditions are completed within 12.2 seconds.
| Maximum value - minimum value of change of tank pressure during 12.2 seconds | ≥ 0.05 kPa (0.375 mmHg, 0.02 inHg) |
| Maximum value - minimum value of battery voltage during 12.2 seconds | ≥ 0.609 V |
Time Needed for Diagnosis: 12.2 seconds x 4 times
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cycles.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
| Malfunction Criteria | Threshold Value |
|---|---|
| DELFLMAX | 0.27 ← → 0.894 V |
| SUMFL At that time, DELFLMAX: Maximum difference of sensor output for 12.2 seconds; SUMFL: Integrated value of the sensor output deviation for 12.2 seconds |
< 25.92 V |