Combination valve, checking

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Engine codes AEG, AVH, AZG, BBW and BEV

Requirements

No malfunctions stored in DTC memory. Refer to Engine control module Diagnostic Trouble Code (DTC) memory, interrogating and erasing
Final control diagnosis performed. Refer to Adapting components and functions , Adapting functions and components.
Vacuum lines and hose unions must not leak.

Work sequence

NOTE: Do not use compressed air during the following check!

Remove engine cover.

Fig 1: Secondary Air Pump Motor Pressure Hose

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Remove pressure hose (arrow) from secondary air pump motor.

NOTE: Press buttons on hose couplings together to release coupling.

Blow lightly into pressure hose to combination valve.

Combination valve must be closed.

Blow forcibly into pressure hose to combination valve.

Combination valve must open

If combination valve does not open or is continually open:

Replace combination valve.