TM 10-3930-675-24-1
TOPHANDLER LEVELING TROUBLESHOOTING
THIS WORK PACKAGE COVERS
Error Code 128 - Joystick-to-ECU (790) Failure
Error Code 268 - Tophandler Leveling Right, Short Cir-
cuit Failure
Error Code 130 - Overload Protection System Failure
Error Code 270 - Tophandler Leveling Left, Open Cir-
Error Code 240 - Tophandler Leveling Locking Control,
cuit Failure
Wiring Circuit Failure
Error Code 271 - Tophandler Leveling Left, Short Cir-
Error Code 267 - Tophandler Leveling Right, Open Cir-
cuit Failure
cuit Failure
INITIAL SETUP
References
References - Continued
ECS Electrical Servo (A34648.0200) (WP 0048 00-
TM 10-3930-675-10
5)
ECS Attachment (A34652.0200) (WP 0048 00-23)
Current Supply (A34738.0200) (WP 0048 00-31)
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Refer also to illustrations at end of work package for component location.
Table 1. Error Code 128 - Joystick-to-ECU (790) Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 128 - Joystick-to-ECU (790) Failure. 1. Enter diagnostic menu "DIAG a. Operate the joystick slewing
SERVO 6(13)" and check
CW and CCW function
SLEW CW/CCW voltage.
slowly. Should have 1 to 9V
Voltage should be around 5V
over the full range of function.
with no joystick activations.
If the voltage suddenly goes
out of range, replace joystick
(WP 0082 00).
b. If no voltage (5V) is found,
continue with step 2.
2. Inspect ECU (790) connector a. Repair or replace damaged
1. Check connector, harness,
wires or connectors (WP 0113
and ECU (790) for damage.
00).
Check ECU tray ground wires. b. Replace damaged ECU (790)
(WP 0080 00).
