Depressurize system

This function is used to depressurize the hydraulic oil circuit.
Note:
At the end of this procedure the battery must be disconnected while the diagnostic tool is still connected and the brake pedal is still pressed, otherwise the hydraulic oil circuit will pressurize again. Follow instructions exactly or the hydraulic oil circuit will pressurize again.
Test conditions:
Procedure:
  1. Start the function and follow the instructions in the program.
If the function fails, check the test conditions and repair any faults.