P0441
DTC P0441 EVAPORATIVE EMISSION CONT. SYS. INCORRECT PURGE FLOW1. OUTLINE OF DIAGNOSIS
Detect the malfunction of purge flow by the change of ELCM pressure sensor output value before/after purge introduction.
Judge as NG if out of specification.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis only once after engine start.
4. DIAGNOSTIC METHOD
First diagnosis
Pressure decreases when the purge is introduced compared with when the purge is not performed. By using this, judge if the purge is correctly performed. If there is no pressure decrease, go to the second diagnosis.
- Abnormality Judgment
Judge as NG when the following conditions are established.
Time Needed for Diagnosis: 26 seconds
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis: 26 seconds
Second diagnosis
Close the ELCM switching valve, and close the fuel tank completely, and perform the forced purging. If pressure change amount is 0.7 kPa (5 mmHg, 0.2 inHg) or less, judge as malfunction of purge flow.
- Abnormality Judgment
Judge as NG when the following conditions are established.
Time Needed for Diagnosis: 21 seconds
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.
Time Needed for Diagnosis: Less than 21 seconds