Test (EGR) Exhaust gas recirculation

This function is a test and is used to check the function of the EGR valve. An increase of the EGR mass flow will change the engine sound when the EGR valve is activated. The engine may run rough at idle when the EGR valve is activated, since the valve is open.
Note:
The EGR valve position should be about 90 - 100 % at manual activation. Check that the different EGR values are changed when activated.
Test conditions:
Procedure:
  1. Start the function.
  2. Use the buttons to start and stop the test.
  3. Check that the different values are changed.
  4. The function is done.