Fuel pump performance detection method
Some hard faults (such as inoperable) in the car fuel pump are easier to judge, but some intermittent soft faults are more difficult to judge. In this regard, the method of detecting the working current of the fuel pump by the automobile digital multimeter can be used to judge the performance, and the specific method is as follows.
(1) Place the car digital multimeter in the current block, press the function key (SELECT) to adjust to the direct current (DC) gear, and then connect the two test leads in series to the connected fuel pump connection line.
(2) Start the engine. When the fuel pump is working, press the dynamic record button (MAX/MIN) of the car digital multimeter to automatically record the maximum and minimum currents of the fuel pump when it is working. By comparing the detected data with the normal value, the cause of the failure can be determined.