TM9-2320-360-20-3 S e c t i o n   4 TROUBLESHOOTING   CHARTS D. CHART -2 - ENGINE CRANKS BUT WILL NOT START (Cont’d) STEP/SEQUENCE C 2-4 Check  for  Aerated Fuel Loosen  fuel  return  line. Observe fuel flow out of line while cranking.  (You  an  direct  the  fuel into  a  bucket.) C2-5 Check  for  White Smoke Reconnect  fuel  return  line. Look  for  white  smoke  coming  out of the exhaust stack while cranking  the  engine. C  2-6 Check  TRS  Status via RPM Read-out Select ENGINE RPM on DDR. Crank engine while observing DDR  display.  (NOTE:  Battery voltage  surge  while  cranking with electric starters may blank out  or  reset  DDR.) C  2-7 Check   TRS Turn  ignition  off. Disconnect   engine   harness connector  at  the  ECM. Read   resistance   between sockets  T1  and  T2  at  the engine   harness   connector. Flow is steady. No  flow  or intermittent  flow. White  smoke. No  white  smoke. Display   always reads  greater  than  or equal  to  60  RPM  while cranking. Display sometimes or  always  reads  less  than 30  RPM  while  cranking. Between  100 and  200  ohms. Less  than 100 ohms. Greater  than 200  ohms. WHAT  TO  DO  NEXT Go  to  C  2-5. Check  fuel  filter(s)  and  supply lines to determine cause of problem  (refer  to  Chapter  2, Vehicle  Troubleshooting,  for  details). Your problem appears to be with cylinder  compression  or restricted  air  intake.  Notify supervisor. Go   to   C2-31. Go  to  C  2-12. Go  to  C  2-7. Go  to  C  2-8. Go  to  41-2. Go  to  41-3. H-45