A R M  Y TM MARINE    CORPS    TM AIR FORCE T0 5-6115-612-12 6115-12/7 35C2-3-471-1 N   A   V  Y AG-320B0-0MM-000 4-63.    GENERAL.    (cont) c. Electrical  Function.  (cont) (6)  Status Monitoring and  Con- t r o l . Engine and generator status are m o n i t o r e d  by the EECM. If m a l f u n c t i on is  detected, the   EECM either   corrects   the   problem   or   shuts down    the    engine. The EECM checks for low  oil  pressure,  overtemperature,  and o v e r s p e e d . T h e EECM checks the generator  for  an  overload,  overvoltage, overtemperature,    and    undervoltage.    If a    malfunction    is    detected,    the    EECM waits  three-fourths  of  a  second  before taking     action. The EECM will try to correct   a   detected   malfunction   before an  automatic  shutdown  is  Initiated.  An automatic  shutdown  decision  causes  the EECM to deenergize the contactor r e l a y . The    EECM    then    signals    the contactor   control   and   status   line   to turn   off   the   READY   TO   LOAD   lamp   and stop    the    HOURMETER. The EECM enables the   shutdown   control   line,   shuts   off the   high   pressure   fuel   pump   and   the fuel    solenoid    valve,    and    stops    the e n g i n e . When  the  automatic  shutdown o c c u r s , the  EECM  signals  the  engine status/generator    status    lines    on    the control  panel  to  light  the  appropriate MALFUNCTION   indicater   Light.   The   mal- function    must    be corrected before attempting to restart the engine. (7) Manual Contactor Disabling. Placing    the    CONTACTOR    switch    in    the O   P   E   N position opens the  contactor relay,  stops  electric  power,  and  turns off    the    CONTACTOR    CLOSED    lamp. The engine  will  continue  to  run. (8)  Manual  Shutdown. Placing the MASTER    SWITCH    in    the    OFF    position causes  the  EECM  to  deenergize  the  con- tactor    relay, activate  engine  shutdown control    line, deenergize the solenoid valve  and  the  high  pressure  fuel  pump, shutting  down  the  engine. NOTE If not specified in maintenance procedure, apply torque    in accordance with table 1-1, Torque Specifications. 4-64. ENGINE ELECTRONIC CONTROL MODULE. Maintenance of the  engine electronic  control  module  (EECM)  con- sists   of replacement. When test- ing/troubleshooting procedures isolate the EECM as the cause of a malfunction, remove  the  EECM  and support  maintenance  for a. Removal. send to direct repair. WARNING To prevent injury, ensure  that battery is disconnected  before performing maintenance on electrical  components. (1) Disconnect battery cable plug connector from battery. (2)  Open  control panel access door. (3) Loosen turnlock fasteners and remove  EECM  access  cover  (1,  figure 4-39). (4)   Remove   nuts   (2)   and   washers (3). (5) Lift EECM off resilient mounts (7) and out of control fender. (6) Tag and disconnect electrical connectors J4 (4), J5 (5), and J6 (6). (7)  Inspect  resilient  mounts  (7) and  ground  strap  (8). Replace    if damaged. 4 - 1 2 2