Error Code 128 - Joystick-to-ECU (790) Failure - Cont

Table 1. Error Code 128 - Joystick-to-ECU (790) Failure Troubleshooting Procedures - Cont - TM-10-3930-675-20-1_624

Table 2. Error Code 130 - Overload Protection System Failure Troubleshooting Procedures - TM-10-3930-675-20-1_626

TM-10-3930-675-20-1 Rough Terrain Container Handler (RTCH): RT 240; 53 000 Lb Capacity; 4x4 Manual
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TM 10-3930-675-20-1 0044 00-3 TOPHANDLER LEVELING TROUBLESHOOTING - CONTINUED 0044 00 Table 1. Error Code 128 - Joystick-to-ECU (790) Failure Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 128 - Joystick-to-ECU (790) Failure - Continued i. Check resistance of joystick potentiometer: joystick pin 9 to joystick pin 10 should be 1.1-1.4k ohms; joystick pin 9 to joystick pin 11 should be 1.6-1.9k ohms; joystick pin 11 to joystick pin 10 should be 1.6-1.9k ohms. If resistance is not as specified, replace joystick (WP 0081 00). j. Replace ECU (790) (WP 0079 00). 2. Enter “Diagnosis Servo 6 (13)” menu and check voltage of SLEW CW/CCW. If voltage reads 5V, perform the following steps: a. Slowly activate slewing function and move joystick right and left. Observe voltage on menu. Voltage should be 1-9V. If voltage suddenly goes out of range when joystick is moved, replace joystick (WP 0081 00). b. Remove ECU (790) cover from operator’s seat base and slide ECU mounting tray out. c. Remove joystick cover. d. Check ECU (790) connector 1, tray grounding leads, and joystick con- nector X155 for proper connections. 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.

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