EVAP System
EVAP System
The EVAP canister system (including fuel tank) is equipped with leak diagnosis. The leak diagnosis will detect whether the system is leaking.
The diagnosis operates by pressurizing the system and should detect leaks where the damage exceeds 1 mm in diameter.
During the diagnostic, the Leak Detection Pump (LDP) -V144- generates a positive pressure of approx. 30 mbar in the EVAP canister system. The pump will switch off when the pressure is attained. When the pressure falls to below a certain figure, the pump will switch on again. On Board Diagnostic monitors the switch intervals and stores a DTC in DTC memory if the intervals are too short.
NOTE:
- Hose connections are secured with either screw-type or spring-type clips.
- Always replace tensioning clamps with spring-type clamps or screw-type clamps.
- Fuel hoses at engine must only be secured with spring-type clips. The use of clamp or screw-type clips is not permissible.
- VAS 5024A spring clip installation tool is recommended for installing spring-type clips.
- Components marked with are tested via On Board Diagnostic (OBD), Diagnostic mode 3: Check DTC memory.
Observe safety precautions.
Observe rules for cleanliness.