JLG E450A Service And Maintenance Manual page 390

SECTION 6 - JLG CONTROL SYSTEM
DTC Cat DTC Num
25 76 PLATFORM LEVEL PREVENTED – ABOVE ELEVA-
TION
25 78 FUNCTION PREVENTED – TILTED & ABOVE ELE-
VATION
25 79 DRIVE PREVENTED – EXCESSIVE GRADE
31 11 MAIN CONTACTOR DRIVER – PERMANENTLY
OFF
31 12 MAIN CONTACTOR – OPEN CIRCUIT
32 12 MAIN CONTACTOR – WELDED OR MISWIRED
32 13 MAIN CONTACTOR DRIVER – PERMANENTLY ON Master Traction Module detects that the line con-
33 4 LIFT UP VALVE – OPEN CIRCUIT
33 6 LIFT DOWN VALVE – OPEN CIRCUIT
33 7 STEER LEFT VALVE – SHORT TO BATTERY
33 8 STEER LEFT VALVE – OPEN CIRCUIT
33 9 STEER RIGHT VALVE – SHORT TO BATTERY
33 10 STEER RIGHT VALVE – OPEN CIRCUIT
33 11 GROUND ALARM – SHORT TO BATTERY
33 71 GROUND ALARM – SHORT TO GROUND
33 76 HEAD TAIL LIGHT - SHORT TO GROUND
33 77 HEAD TAIL LIGHT - OPEN CIRCUIT
33 78 HEAD TAIL LIGHT - SHORT TO BATTERY
6-74
Table 6-17. Diagnostic Trouble Codes
DTC Text
UGM has determined that all of the following con-
ditions exists:
Platform Level Override Cutout = Enabled;
Machine is Enabled;
The Platform Level Up or Down switch input =
High;
Machine is in Platform mode
Machine is Above Elevation and Tilted
MACHINE SETUPTILT X DEGREES + CUT and
the operator is attempting to activate Drive or
Steer, Lift Up, Tower Up or Telescope Out. Where X
= 3, 4, or 5 Degrees)
DTC 0046 is active;
Drive speed request, in direction of ascending
grade, is greater than zero;
Master Traction Module detects that the line con-
tactor driver is out of order and not able to close
(Contactor Driver; 75)
Master Traction Module detects current through
Contactor Coil but no voltage on Contactor contacts
during active traction or pump.
Master Traction Module determines at Startup that
Line Contactor is closed/stuck before command
tactor driver output failed short or contactor coil is
disconnected/open circuit
The UGM detects an open circuit at the Lift Up Sole-
noid
The UGM detects an open circuit at the Lift Down
Solenoid
UGM detects a short to battery at steer left output
The UGM detects an open circuit at steer left output UGM no longer detects OC;
The UGM detects a short to battery at steer right
output
The UGM detects an open circuit at steer right out-
put
The UGM detects a short to 12V battery at this out-
put
The UGM detects a short to ground at this output
MACHINE SETUP -> H & T LIGHTS =YES;
UGM detects a short to ground at head/tail light
relay output
MACHINE SETUP -> H & T LIGHTS =YES;
UGM detects a short to ground at head/tail light
relay output
MACHINE SETUP -> H & T LIGHTS =YES;
UGM detects a short to battery at head/tail light
relay output
Fault Description
Not all of the trigger conditions are met
At least one of the trigger conditions is not met;
then non-Creep function speed permitted after
controls initialized.
CntIni (drive joystick returned to center position)
Power cycle
Power cycled
Power cycle
Power cycle
UGM no longer detects OC;
Speed restriction removed after CntIni;
UGM no longer detects open circuit;
Inhibits and restrictions removed after CntrlIni;
Power cycle
Speed restriction removed after CntIni.
Power cycle
UGM no longer detects OC;
Speed restriction removed after CntIni.
Power cycle
Power cycle
Power cycle
UGM no longer detects open circuit
Power cycle
Solution
3121714