Evaporative Emissions System: Service and Repair

EVAP System Schematic Overview

• Hose connections are secured with either spring type or clamp type clamps.

• Hose clip pliers (VAS 6340) or (VAS 6362) are recommended for installing space saving clamps.

The connectors for the fuel, vacuum and ventilation lines are color coded. There is either a colored dot on the connector or the release button is the corresponding color.











1 Separating Point

• In the front of the engine compartment on the right side, under the coolant expansion tank.

2 Vent Line

• White

• From the Evaporative Emission (EVAP) canister to the EVAP canister purge regulator valve 1.

• Installed position: On the right side of the underbody.

• Attached to the fuel tank.

3 Vent Line

• Green

• From the engine to the leak detection pump.

• Installed position: On the right side of the underbody.

• Attached to the fuel tank.

4 Separating Point

• In front of the fuel tank on the right side, near the fuel filter.

5 Fuel Filler Tube

6 Vent Line

• From the filler tube to the EVAP canister.

7 Air Filter Housing

• For the leak detection pump.

8 Leak Detection Pump (V144)

• Installed location: Under the right rear wheel housing liner.

• Removing and installing, refer to => [ Leak Detection Pump V144 ] Service and Repair.

• Checking the fuel system for leaks. Refer to => [ Fuel System, Checking for Leaks ] Testing and Inspection.

9 Connecting Line

• From the leak detection pump to the EVAP canister.

• Attached to the bracket.

10 EVAP Canister

• Installed location: On the bottom of the spare tire wheel well.

• Removing and installing, refer to => [ EVAP Canister ] Service and Repair.

11 Separating Point

• On the rear of the fuel tank, on the right side.

12 Turbocharger

13 Brake Booster

14 Vacuum Pump

15 Check Valve

• Installed position: The arrow points in the direction of flow.

16 EVAP Canister Purge Regulator Valve 1 (N80)

• Checking, refer to the vehicle diagnostic tester.

17 Check Valve

• Allocations for differing versions the Parts Catalog.

18 Throttle Valve Control Module (J338)

• Removing and installing, refer to => [ Throttle Valve Control Module J338 ] Removal and Replacement.

19 Intake Manifold