This test is used to check the air circuit in the EAS-system. The test can also be used to trace mechanical faults in the feed line to the EAS-module, dosing module, and AdBlue injector. The test uses 2 pressure sensors (pressure sensor before the restriction and after the restriction). Before the restriction the pressure shall be approx. 8,000 mbar (pressure from tank). After the restriction it shall be below 4,000 mbar for the pass to be approved. If the pressure is above 4,000 mbar after the restriction there is some blockage in the air circuit. The test runs for 75 seconds.
Below 4,000 mbar after restriction, test approved.
Above 4,000 mbar after restriction, test not approved.
Test conditions:
Air pressure above 8,000 mbar.
Ignition on, engine off.
AdBlue tank temperature above -5 °C.
Voltage above 20v.
Temperature after catalytic converter below 400 °C.
Procedure:
Start the function.
Press "OK".
Check the data lists.
Press "OK".
The function is done.
If the function fails, check the test conditions and repair any faults.