The function is used to open and close the warm-up valve for the Adblue tank to check any electric problems in the valve.
Only electric problems are checked with this test.
Test conditions:
Parking brake applied.
Engine off.
Ignition on.
Battery voltage above 20V.
Procedure:
Start the function.
Activate the valve.
Check status of the valve.
The function is done.
If the function fails, check the conditions and repair any faults.