Mode A

Output of rotational speeds of selected cylinders during a compression test All injections are inhibited in order to allow a compression test by actuating the starter without starting the engine. The rotational engine speed at each top dead center (TDC) is provided. A lower cylinder selective engine speed in compression to the others shows a higher compression of this cylinder. A higher cylinder selective engine speed a lower compression. The fuel balancing control (FBC) correction values in this test are zero. Note that the purpose of the test is to see the relative performance of each cylinder. The higher or the lower compression mentioned here does not necessarily mean that the actual engine cylinder compression performance as a gage pressure is showing a same property.