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TM   9-2815-202-34 2-5. MALFUNCTION,   TEST   OR   INSPECTION,   AND   CORRECTIVE   ACTION PROCEDURES   (Cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE  ACTION COLD   STARTING   OPERATION 15. INOPERATIVE   AIR   BOX   HEATER   AT   LOW   AMBlENT   TEMPERATURE Step1. Check spark at air box heater. a. Using aglow test light, test for spark at electrode. (Refer to Para4-1 or 6-11 for  appropriate  engine  model.) b.  inspect  for  electrical  shorts,  defective  ignition  coil,  and  cracked  electrode porcelain. c. If necessary, replace faulty parts. (Refer to Para 4-10 or 6-11 for appropriate engine  model) Step 2. Check fuel at air box heater. a. Replace fuel filter and strainer elements. b.  Clean  fuel  nozzle. Step 3. Check solenoid valve using a multimeter. Replace if faulty (Refer to Para 4-10 or  6-11 for appropriate engine model). Step 4. Check air pump for air flow. Replace pump if faulty (Refer to Para 4-10). Step 5. Check ignition coil for spark at electrode. Replace coil if faulty (Refer to Para 4-10 or 6-11 for appropriate engine model). Step  6.  Check  pump  and  motor  assembly  for  fuel  flow. Replace  assembly  if  faulty  (Refer  to  Para  6-11  ). END   OF   TEST 2-18


 


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