Connection Diagram - EVAP System, With Tank Leak Diagnosis System, Vehicles With 8-Cylinder Engine

Fig 1: EVAP Canister And Leak Detection System Hose Diagram

Courtesy of AUDI OF AMERICA, LLC

1. Vacuum Line
   • From the engine to the Leak Detection Pump -V144-.
   • Clipped into brackets under the vehicle underbody
2. Breather Line
   • From the fuel tank locking flange to the Evaporative Emission (EVAP) canister
   • Clipped into brackets under the bottom of the luggage compartment
3. Fuel Tank Locking Flange
4. Air Filter
   • For the Leak Detection Pump -V144-
5. Connecting Line
   • From the Leak Detection Pump -V144- to the EVAP canister.
   • Clipped into brackets under the vehicle underbody
6. EVAP Canister
   • Installed location: under the luggage compartment floor
   • Removing and Installing. Refer to EVAP CANISTER, REMOVING AND INSTALLING .
7. Leak Detection Pump -V144-
   • From MY 2013 replaced with Fuel Tank Leak Detection Control Module -J909- with integrated Fuel Tank Pressure Sensor -G400-
   • Installed location: on the EVAP canister under the bottom of the luggage compartment
   • Check in Guided Fault Finding  mode using the Vehicle Diagnostic Tester.
   • Removing and Installing. Refer to LEAK DETECTION PUMP, REMOVING AND INSTALLING .
8. Breather Line
   • From EVAP canister to EVAP Canister Purge Regulator Valve 1 -N80-
   • Clipped into brackets under the vehicle underbody
9. EVAP Canister Purge Regulator Valve 1 -N80-