TM 10-3930-675-20-1 0041 00-7 BOOM IN/OUT TROUBLESHOOTING - CONTINUED 0041 00 Table 4. Error Code 161 - Extension Cylinder Boom IN Control, Component Failure Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 161 - Extension Cylinder Boom IN Control, Component Failure - Continued 8.  Check    continuity    between connector   X159   pin   1   and connector X158 pin 5. If    continuity   is    not    present, repair or replace connectors (WP 0111 00). 9.  Enter    “DIAG    SERVO    10 (13)” menu and check current of    OUTPUT    BOOM    IN. Current   should   be   present with    joystick    activated    to move boom in. If current is not present, replace ECU (790) (WP 0079 00). Table 5. Error Code 163 - Extension Cylinder Boom OUT Control, Wiring Circuit Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 163 - Extension Cylinder Boom OUT Control, Wiring Circuit 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.  Check voltage (20-25V) between connector X158 pin 7 and pin 8. If voltage is not present, perform the following continuity checks. a.  Check  continuity  between ECU (790) connector 2 pin 5 and connector X158 pin 8 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