ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 3-9 Section V.  UNIT LEVEL TROUBLESHOOTING PROCEDURES 3-10.   GENERAL. This section contains unit level troubleshooting and tests for the engine assembly.  Each malfunction or trouble  symptom  is  addressed  and  is  followed  by  a  series  of  inspections  or  tests  necessary  to  determine  the probable cause and corrective action. 3-11.  TROUBLESHOOTING. a.    This chapter does not list all possible malfunctions that may occur, all tests or inspections that may be performed, or all corrective actions for each malfunction.  Only those checks and tests authorized for the unit level are covered.  If a malfunction is not listed, or is not remedied by corrective actions, notify personnel at a higher maintenance level. b.    Prior to using troubleshooting table, be sure you have performed all normal operational checks. c.    These  troubleshooting  procedures assume that electrical wires are undamaged and wiring harnesses are  operable.    Conduct  continuity  checks  on  suspect  wiring  /  harnesses  as  required  prior  to  performing troubleshooting procedures in Table 3-3.    d.    Refer to Table 3-2, Malfunction Index, for determining applicable troubleshooting procedure located in Table 3-3. Table 3-2.  Malfunction Index Trouble Procedure Engine will not crank 1 Engine will not start 2 Engine starts and stops 3 Engine output drops 4 Engine runs rough   5 Low compression pressure 6 Engine emits white smoke 7 Engine emits black smoke 8