On North American cars it located under the fuse panel cover, under the hood, on the drivers side of the car. Access to the relay is achieved by removing the four T-25 torx head screws and lifting the cover panel off of the electrical center.
http://www.matthewsvolvosite.com/forums/viewtopic.php?t=9681
Fuel pump relay or Knock sensor if stall after maybe 2 miles
n.a. fuse relay only.
fuel pump relay is located behind the ashtray and fuse box, in the relay panel. its white. u simply pull it out and push the new 1 in.
under the hood is a plastic box full of square relays check owners manuel to see which is fuel relay pump will not work if relay is bad
Check the fuel pump, fuel pump wiring, fuel pump relay and fuel pump fuse.
check to see if the fuse is bad
check the fuses and change the fuel pump relay first in the fuse box behind the front ash tray goggle Volvo relays to see it. and fuel cleaner in the fuel tank.
In the Volvo V40, the fuel injection relay is typically located in the engine compartment fuse box. You can find the fuse box on the driver's side near the windshield. Consult the vehicle's manual for the exact relay location and diagram, as it may vary by model year. Make sure to check the relay's condition if you're experiencing fuel injection issues.
It is the Volvo fuel injection relay . It provides the ground path for the fuel injectors. According to info I found, Volvo 1323592-1 is used as a cooling fan relay and as a noise suppression relay.
If the relay is not supplying power to the fuel pump, then no fuel to the motor. No fuel - no power.
fuel relays & fuel pressor
I don't have the pinout, however you can put your fingers on the relay, put the ignition on you must feel a click at the fuel relay coil. However, the contacts relay are maybe defects, if you have a doubt change it. It's maybe 20$. Be sure about fuses.