The function is used to activate or deactivate the built-in system that controls the amount of air that passes through the air dryer and activates a warning when it is time ti change dryer agent reservoir.
Test conditions:
Parking brake applied.
Battery voltage above 20 V.
Procedure:
Select desired function.
A dialogue with test conditions is shown, press "OK".
A dialogue with finish diagnostic function is shown, turn off the ignition and wait 10 seconds.
Turn on the ignition again.
Press "OK" and exit the function.