2004 S60 leak detection pump trouble

[pt109]

My 2004 2.5T S60 is given off a trouble code of "284: ECM-4024 Leak diagnositc unit, pump. Signal too high."

This is the second time it has happened. Translated, I think that means the leak detection pump needs replaced (gas cap on tight).

I have purchased a new one and need some help on removal and replacement.

Does anyone have some instructions they could provide?

Thanks in advance.