SCR system draining

This function is used to drain the SCR systems of AdBlue.
Normally a draining of the system is performed when the key is turned to OFF position, but some vehicles are equipped with delayed draining to reduce startup time during short stops.
The test can be used before service which requires that the SCR system is opened.
Test conditions:
Procedure:
  1. Start the function.
  2. Check test conditions.
  3. The system is drained.
  4. The function is done.