Fuel Pump Relay

Remove fuel pump relay. Apply battery voltage to relay terminal No. 30 and terminal No. 86. See Fig 1 . Ground relay terminal No. 85. Voltage should now exist at relay terminal No. 87. Replace relay if it does not work as indicated.

NOTE: If relay does not work on vehicle, check battery feed, DME master (main) relay, DME/Motronic control unit and ground circuits going to fuel pump relay. See WIRING DIAGRAMS section. Only sockets No. 2, 4, 6 and 8 are used by relay.

Fig 1: Identifying Fuel Pump Relay Terminals & Socket (318i, 318is, 318ti)

Courtesy of BMW OF NORTH AMERICA, INC.