TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (continued).
2.
KNOWN INFO
TEST OPTIONS
Error Code, EC 02 and/
Does the main frame
Visual inspection.
or EC 17.
unload with only the
REASON FOR QUESTION
Operates with either cab
cab controls (remote
controls or remote
inoperative)?
If the main frame unloads
control.
with the cab controls but
not the remote control,
POSSIBLE PROBLEMS
the problem is located in
Cab control box faulty.
the remote control
Linking harness faulty.
portion of the circuit.
Main junction box wiring
faulty.
MODEL A, main
Main frame UNLOAD
frame unloads
solenoid harness faulty.
NO
only with remote
Function switch faulty.
control; go to
MODE SELECT switch
step 10.
faulty.
MODEL B, Go to
Remote control unit
Step 16.
faulty.
YES
Remote control cable
faulty.
Remote linking harness
faulty.
4-270
Change 1
