This function is a test and is used to pressurize the system and see if it is tight or has a leak. The pressure is maintained until the routine is finished.
This test must always be run when hoses have been disconnected, filters, or pump module have been replaced.
Note:
During start-up the AdBlue injection lines are pressurized. Where there are leaks AdBlue may run out on the vehicle.
The test should only be performed if UDST (Urea dosing system test) writes matching fault code.
Test conditions:
Ignition on, engine off.
Battery voltage above 20V.
All hoses and lines in the AdBlue-system must be connected before the test starts.
Check that no fault codes are stored in the engine control unit.
Procedure:
Start the function.
A dialogue box shows the test conditions, check these and press "OK".
Communication will be established with the control system.
Start activation of the pump.
The function is complete.
If the function fails, check the test conditions and repair
any faults.