Trailer control valve
This function is used to test the brake pressure to the trailer control valve.
Test conditions:
Connect pressure gauge to coupling head (yellow) for brake pressure of trailer.
Compare the pressure gauge pressure values against the actual values shown.
The engine at idle to reach enough air pressure.
Parking brake released.
Procedure:
Start the function.
Press the "OK" button.
The test is run automatically.
The function is done.
If the function fails, check the test conditions and repair any faults.