Air Supply Valve, test

This test is used to check the air circuit on the EAS system.
Components which can be checked for mechanical faults during the test:
Note:
The AdBlue injector cannot be checked during the test.
There should be a clicking sound and air mass flow during activation.
No clicking noise is heard and no air mass flow occurs.
Possible faults:

Faulty air supply valve.

Faulty dosing module.
Clicking noise is heard, but no air mass flow occurs.
Possible faults:

No air supply from circuit 4.

Clogged air/oil separator.

Faulty dosing module.

Clogged AdBlue line.

Faulty air supply valve.
Test conditions:
Procedure:
  1. Dosing test must be carried out.
  2. Remove the Adblue feed line to the injector.
  3. Check test conditions.
  4. Start the function.
  5. After activation is completed, a reset must be done before a new activation is possible.
  6. Fit the Adblue feed line to the injector.
  7. The function is complete.