Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 70 °C.
Note:
For diagnosis of the EGR system.
Procedure:
Choose the function: EGR system.
Drive the vehicle for three to four minutes.
Keep the engine speed between 1800 and 3600 rpm. Release the throttle pedal quickly to simulate over-revving.
The value in the EGR system adaption status column must change from ”Test off” to ”Test on”. Let the engine idle until the value changes to ”System OK!/System not OK!”.
Required values at test: Induction manifold pressure 240-420 mbar; induction manifold pressure difference between open and closed EGR valve at least 50 mbar.