EVAP system malfunction judgment

M-MDS detects the small/large leak or blockage based on fuel tank pressure at the end of EVAP Test.
The EVAP Test could not obtain the target vacuum. A large leak or blockage is suspect.
- This judgment means tank pressure could not arrive at target pressure at stage 1 test.
- Check for the large leakage or inspect the purge solenoid valve operation and related hoses.
- Repair or replace any malfunctioning parts.
The EVAP Test could not maintain the target vacuum. A small leak is suspect.
- This judgment means tank pressure could not stay in target pressure at stage 2 test.
- Run the EVAP Test again after retightening the fuel filler cap.
- If small leak is suspected again, use the leak tester or ultrasonic leak detector to identify the leak point.
- Repair or replace any malfunctioning parts.
Blockage in EVAP system.
- This judgment means tank pressure could not return to atmosphere at stage 3 test.
- Inspect the CV solenoid, air filter, charcoal canister and related hoses for blockage.
No large leaks or blockage have been detected in the EVAP system at this time.
- M-MDS can not detect "VERY SMALL LEAK".
- To identify the leak point, please use the leak tester or ultrasonic leak detector.