ARMY TM 9-6115-671-14 AIR FORCE TO 35C2-3-446-32   MARINE CORPS TM 09249A/09246A-14 3-16 TABLE 3-1.  OPERATOR TROUBLESHOOTING (CONTINUED) Yes OK OK Yes No Not OK CIM DISPLAY SCREEN FREQ GAGE FLUCTUATES CIM display screen FREQ gage fluctuates.   (fig.2-2) Is engine running erratically? Check FAULT INDICATOR on CIM display screen. Is a fault displayed? (fig. 2-2) Notify next higher level of maintenance. Inspect air cleaner assembly (see para.3.3.3). Got to troubleshooting section corresponding to fault displayed. See Symptom Index, page 3-1. Service air cleaner assembly (see para.3.3.3). Inspect/service fuel filter/water separator (see para.3.3.7). Notify next higher level of maintenance. Notify next higher level of maintenance. Not OK No