[Richard_G]

Wait until it is up to pressure and the pump stops, then press the brake pedal and see how many times you can press it before the pump cuts in again. If you can press 3 or 4 times before it cuts in, then the accumulator is fine, if it cuts in on every press or only after 2, it needs replacing. The brake pedal does need more pressure than you might be used to on other cars but if the brakes seem weak, they might need bleeding. Air in the pressure circuit will give a slight delay between hitting the pedal and the brakes coming on.

 

[Richard_G]

Engine on or off, it doesn't matter as long as the ignition is on.

 

[Richard_G]

Ignition off and pump the brake pedal 30 times to depressurise.