5. FUEL INJECTION SYSTEM MXU 500EXi/MXU500i Battery FUEL PUMP RELAY INSPECTION Remove the fuel pump relay. Connect the ohmmeter to the fuel pump relay connector terminals. Connection: R/L-B/R Connect 12 V battery with the fuel pump Fuel Pump Relay relay connector. Connection: R/Y-O/R There should be continuity only when 12 V battery connected. If there is not continuity when the 12 V battery is connected, replace a fuel pump relay. REMOVAL Disconnect the fuel pump relay connector and remove it from frame. Fuel Pump Relay 5-18