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Removing and installing combination valve for secondary air system > < Checking secondary air pump relay J299 and activation

A3 Mk1

Checking combination valve for secondary air system for proper operation and leakage
Checking combination valve for secondary air system for proper operation and leakage
   
Test sequence
–  Take off engine cover panel -arrows-.
  A10-0885
–  Detach pressure hose -arrow- at secondary air pump.
  A26-0310
–  Blow lightly into pipe with your mouth (do not use compressed air).
l  The combination valve -arrow- should be closed; it should not be possible to blow through the valve.
–  Blow into pipe with your mouth using more pressure (do not use compressed air).
l  The combination valve for secondary air should open; it should now be possible to blow through the hose.
If combination valve for secondary air does not open:
–  Renew secondary air combination valve → Chapter.
  A26-0728

Removing and installing combination valve for secondary air system > < Checking secondary air pump relay J299 and activation