I was having a look at a wiring diagram and it doesn't list a relay for the pump but it must have one somewhere i'd think.

Also whats strange is the fuse location acording to diagram is in the passenger compartment fuse box but there's no listing for it but its listed as a 30A fuse in either position 14 or 16 in engine compartment fuse box dpending on what years.

The only thing listed in passenger compartment fusebox is a particulate filter but that can't be it on a petrol model.