Evaporative Emissions System: Service and Repair
EVAP System Components
• Hose connections are secured with either spring-type or clamp-type clips.
• Hose clip pliers (VAS 6340) or hose clip pliers (VAS 6362) are recommended for installing spring-loaded band-type clamps.
The connectors for the fuel, vacuum and ventilation lines are marked with colors. There is either a colored dot on the connector or the release button is the corresponding color.
=> [ EVAP Canister ]
Eos=> [ Leak Detection Pump (V144) ]
EVAP Canister
Special tools, testers and auxiliary items required
• Engine/Transmission Jack (V.A.G 1383 A)
Removing
- Remove the center and rear mufflers.
- Remove the heat shield retainers - arrows - and shield.
- Place the engine/transmission jack (V.A.G 1383 A) under the rear subframe.
- Loosen the bolts - arrows - for the rear subframe and unscrew them approximately 20 mm.
- Lower the rear subframe slowly using the engine/transmission jack (V.A.G 1383 A).
- Disconnect the vent lines - A -.
- Remove the bolts - B -.
• The Eos has a reinforcement plate. Use the T bar and socket 10 mm (3185) to loosen and tighten the bolts - B -.
- Release the retaining straps - A - using a screwdriver. Rotate the EVAP canister approximately 90° clockwise - B - and remove the canister.
Installing
Install in reverse order of removal. Note the following:
- Connect the ventilation lines until they engage audibly.
- Install the rear subframe.
Tightening Specification
Leak Detection Pump, Eos (V144)
Removing
- Disconnect the vacuum line - 1 -, ventilation line - 2 - and ventilation line - 3 -.
- Remove the nuts - arrows -.
- Remove the leak detection pump with bracket and disconnect the electrical connector.
Installing
Install in reverse order of removal. Note the following:
• Before installing the leak detection pump with bracket, connect the electrical connector.
• The vent line - 2 - must engage audibly.
Tightening specifications, refer to => [ EVAP System Components ] Description and Operation.