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Removing and installing secondary air pump > < Principle and function

A4 Mk2

Secondary air system - overview
   
Secondary air system - overview
1 - From air cleaner housing
2 - Secondary air pump motor -V101-
q   Fitting location → Fig.
q   Removing and installing → Chapter
3 - Secondary air pump relay -J299-
q   Fitting location → Fig.
4 - Motronic control unit -J220-
5 - Combination valve for secondary air system (right-side)
q   Fitting location → Fig.
q   Checking → Chapter
q   Removing and installing → Chapter
6 - Secondary air inlet valve -N112-
q   Fitting location → Fig.
7 - Non-return valve
q   Installation position (light side/dark side) as shown in illustration. -Arrow- indicates direction of flow.
8 - To intake manifold
9 - Combination valve for secondary air system (left-side)
q   Fitting location → Fig.
q   Checking → Chapter
q   Removing and installing → Chapter
10 - Vacuum reservoir
q   Fitting location: in front left wheel housing beneath liner

   
Fitting location of secondary air inlet valve -N112-
t  Bolted to retainer plate for solenoid valves at rear of engine -arrow-.
  A26-0520
Fitting location of secondary air pump motor -V101-
t  At front right of engine compartment, below longitudinal member.
1 - Secondary air pump motor -V101-
2 - Electrical connector for secondary air pump motor -V101-
  A26-0519
Fitting location of secondary air pump relay -J299-
t  In electronics box (plenum chamber)
3 - Secondary air pump relay -J299-
B - Secondary air pump fuse -S130-
  A24-0430
Combination valve for secondary air system
t  At rear of cylinder heads.
  Note
The illustration shows the right-side combination valve for secondary air system.
  A26-0523

Removing and installing secondary air pump > < Principle and function