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ARMY TM 9-2805-257-14 AIR  FORCE  TO  38G2-103-2 NAVY NAVFAC P-8-612-14E Table  5-1.  Direct  Support  Troubleshooting  Procedures  (cont). Malfunction Test  or  Inspection Corrective  Action 5. ENGINE WILL NOT START OR RUNS ERRATICALLY MODEL 2A016-4. NOTE The  following  procedures  can  be  performed  with  either  a  digital  or  analog  multimeter refer to figure 5-26 for  wiring  diagram  of  electronic  ignition  system. Step 1. Check low and high voltage cable ends for looseness. Tighten  any  loose  connections. NOTE There are two high voltage cables, repeat step for both cables. Step 2. Remove high voltage cable from spark plug. Ground cable and hold spring approximately 1/4 in. (6 cm.) from engine. Pull start engine and check for spark. If spark is present remove and inspect spark plug (para. 4-19). Step  3.  Remove  ignition  control  unit  cover  and  check  for  moisture  or  foreign  material. If moisture is present clean and dry terminals and connections and repeat step 2. Step 4. Check low voltage cable  end  to  end  continuity. If continuity is not present in all three lines replace low voltage cable (para. 5-13). Step 5. Remove wiring from no. 1 terminal on ignition control unit module. Measure resistance between terminal no. 1 and ground. If reading is less than 1 Megohm replace ignition module (para.  5-12). Step 6. Remove wiring from terminals no. 5 and no. 6 and check resistance. Meter should show an initial deflection then a reading of 1 Megohm. If final reading is not 1 Megohm then replace ignition control unit ignition module (para.  5-12). NOTE There are two transformers in the ignition control unit, repeat steps 7 and 8 for both transformers. 5-4


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