Valve test of retarder


This function is used to activate the retarder's PWM-valve so that 25%, 50%, 75%, and 100% of max. pressure is reached. If the pressure is outside limit values, it may be due to the pressure in the trailer being too low, the retarder's PWM-valve has failed, or that there is a leak in the retarder.

Test conditions:

Procedure:

  1. Start the function.

  2. Check test conditions.

  3. Check that the current value for each level is between the min. and max. value.

  4. The function is done.

    • If the function fails, check the test conditions and repair any faults.