TM 10-3930-675-20-1 0038 00-1 HYDRAULIC PISTON PUMP CUT-OFF TROUBLESHOOTING 0038 00 THIS WORK PACKAGE COVERS Error Code 172 - Hydraulic Piston Pump Cut-Off, Open or Short Circuit Failure INITIAL SETUP References TM 10-3930-675-10 Current Supply (A34738.0200) (WP 0199 00-31) ECS Electrical Servo (A34648.0200) (WP 0199 00-5) NOTE • Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that locate critical components. • Refer also to illustration at end of work package for component location. Table 1. Error Code 172 - Hydraulic Piston Pump Cut-Off, Open or Short Circuit Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 172 - Hydraulic Piston Pump Cut- Off, Open or Short 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  ECU  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.  Access   “EXTRA   FUNC.   2 (13)”   menu   and   test   pump cutoff function. a. If   cutoff   function   does   not work, proceed to step 4. b. If    cutoff    function    works, proceed to step 10. 4.  Disconnect    electrical    con- nector   from   pump   cut-off valve     solenoid     611     and perform    voltage    check    at connector 611. If     20-25V     are     present     at connector   611,   replace   pump cut-off valve solenoid (WP 0169 00). TEST OR INSPECTION- EXTRA FUNCT. 2(13) CUT-OFF THE 0 HYDRAULIC PUMP