Component overview: Notes

1. - Secondary Air Injection (AIR) Pump Motor -V101- 
   • Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101- .
   • Checking. See CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR .
2. - Air filter housing 
3. - Combination valve for Secondary Air Injection (AIR) system 
   • Component location. See COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM .
   • Checking. See COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL .
4. - Check-valve 
   • Installation position (light/dark side): Arrow points in direction of flow, as shown in Fig 1.
5. - Secondary Air Injection (AIR) Pump Relay -J299- 
   • Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- .
   • Checking. See SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- AND ACTIVATION, CHECKING .
6. - Motronic Engine Control Module (ECM) -J220- 
7. - Vacuum reservoir 
   • Component location: Under wheel housing liner in front left wheel housing
8. - Secondary Air Injection (AIR) solenoid valve -N112- 
   • Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112- AND RECIRCULATING VALVE FOR TURBOCHARGER -N249- .
   • Checking. See SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112- CHECKING .
9. - Cylinder head 
Fig 1: Identifying Secondary Air System Components
Courtesy of AUDI OF AMERICA, INC.