22. FUEL INJECTION SYSTEM MXU 500i FUEL PUMP INSPECTIION Put the side stand up and the engine stop switch is at "RUN" Disconnect the fuel pump/fuel unit connector. F Connect the multimeter (+) probe to the Red terminal and the multi-meter (-) probe to the Gray terminal. Turn the ignition switch to "ON" and measure the voltage between the terminals. It should be shown the current battery voltage for a few seconds. E If there is still battery voltage, replace the fuel pump. If there is not any battery voltage, inspect the following: Fuse Fuel pump relay ECU Measure the resistance between the Red and Black terminals of the fuel pump side connector. Standard (at 20°C/68°F): About 10.7 Fuel level sensor inspection Measure the resistance between the red and blue terminals of the fuel pump side connector. Standard (at 20°C/68°F): Float at full position About101 Float at empty position About 3 22-16