TM 10-3930-675-20-1 0041 00-9 BOOM IN/OUT TROUBLESHOOTING - CONTINUED 0041 00 Table 6. Error Code 164 - Extension Cylinder Boom OUT Control, Component Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 164 - Extension Cylinder Boom OUT Control, Component Failure 1.  Remove   ECU   (790)   cover from operator’s seat base and slide ECU mounting tray out (WP 0079 00). 2.  Check ECU (790) connector 2 and tray grounding leads for proper connection. a. Connect any loose or disconnected connections. Push  ECU  mounting  tray  in and install cover. b. Repair or replace any damaged connectors (WP 0111 00). Push ECU mounting tray in and install cover. 3.  Move operator’s cab to transport position and remove transmission rear access cover (WP 0135 00). 4.  Disconnect    electrical    con- nector from boom out solenoid 6006. Error code 163 will    now    show.    Perform voltage    check    at    solenoid 6006 connector. If 20-25V is present at solenoid 6006  connector,  replace  boom out solenoid (WP 0169 00). 5.  Ensure that ignition switch is in  OFF  position.  Disconnect connector X158 located under driver’s seat. 6.  Check    continuity    between connector 6006 pin 1 and pin 2    and    between    connector 6004  pin  1  and  chassis  and connector   6005   pin   2   and chassis. a. If continuity is present, repair or   replace   connectors   (WP 0111 00). b. If   wiring   harness   must   be replaced, notify SRA. 7.  Check    continuity    between connector   X158   pin   8   and ECU (790) connector 2 pin 5 and    between    ECU    (790) connector    2    pin    10    and connector X159 pin 1. If    continuity   is    not    present, repair or replace connectors (WP 0111 00). DIAG SERVO 10(13)         OUTPUT/INPUT BOOM IN    0mA    0mA BOOM OUT   0mA    0mA