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Removing and installing secondary air pump > < Principle and function

A4 Mk2

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

   
Fitting location of secondary air inlet valve -N112-
t  At front on intake manifold -arrow-.
  A26-0678
Fitting location of secondary air pump motor -V101-
t  At front right in engine compartment below longitudinal member
1 - Secondary air pump motor -V101-
  A26-0688
Fitting location of secondary air pump relay -J299-
t  In electronics box (plenum chamber)
2 - 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 left-side combination valve for secondary air.
  A26-0674

Removing and installing secondary air pump > < Principle and function