Activation of control valves
This function is used to test the function of the control valves.
Test conditions:
Ignition on.
Parking brake applied.
The wheels on the front axle and the additional axle should move freely.
Transmission in neutral.
Procedure:
Select desired function.
Press "Start" to activate the selected function.
The function is done.
If the function fails, check the test conditions and repair any faults.