Leak checking
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
If leaks, either small or large, are detected during the Evaporative emissions system leak check, proceed as follows:
- Check if fuel tank cap is secure and seal is not damaged. Replace if necessary.
- Repeat functional check.
If malfunction still present:
- Disconnect Leak Detection Pump hose from EVAP canister and seal it.
- Repeat functional check.
If malfunction still present:
- Remove luggage compartment floor covering.
- Check if fuel supply screw cap is tight and for seal malfunctioning. Replace if necessary.
- Check supply and return lines on fuel pump for leaks.
- Repeat function test.
If malfunction still present:
- Remove air cleaner.
- Check connecting lines and hoses between Leak Detection Pump and EVAP canister.
- Check connecting lines and hoses between EVAP canister and EVAP canister purge regulator.
- Repeat functional check.
If malfunction still present:
- Remove EVAP canister and check for cracks and leaks. Replace if necessary.
- Repeat functional check.
If malfunction still present:
- Check Leak Detection Pump. See LEAK DETECTION PUMP, CHECKING .