Voltage at metering pump -V54-: approximately the same as battery voltage Resistance of metering pump -V54-: approx. 5.2 ohm. No errors in the event log. Outside temperature below 25°C. The coolant temperature is below 30°C. There are no leaks or damage to the fuel lines. There is enough fuel in the fuel tank (the fuel gauge needle in the instrument cluster is not in the red area). Disconnect fuel line from metering pump -V54- and fit suitable plugs.
In the tester, mode Guided functions, call the function "Checking the performance of the fuel pump", open the fuel line and lower it into a measuring cup. Within about 30 seconds, air will be removed from the hose and fuel will take its place. Plug off the hose. Pour the fuel out of the measuring container. In the tester, mode Guided functions, call the function "Checking the performance of the fuel pump", open the fuel line and lower it into a measuring cup.
The test lasts approximately 120 seconds (fuel supply ends). Reconnect the fuel line. Preset dispensing amount: 22 to 28 ml. If nominal volume is not reached, replace metering pump -V54-.