Combination valve, checking
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.
- 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.