JLG 400S Service And Maintenance Manual page 526

SECTION 6 - JLG CONTROL SYSTEM
Help Message DTC
LSS NOT DETECTING CHANGE 8236
LSS STRAIN GAUGE 1 - A/D 8237
DEFECT
LSS STRAIN GAUGE 2 - A/D 8238
DEFECT
FRONT LEFT STEER VALVE – 8639
OPEN CIRCUIT
FRONT LEFT STEER VALVE – 8640
SHORT TO BATTERY
FRONT LEFT STEER VALVE – 8641
SHORT TO GROUND
FRONT RIGHT STEER VALVE – 8642
OPEN CIRCUIT
FRONT RIGHT STEER VALVE – 8643
SHORT TO BATTERY
FRONT RIGHT STEER VALVE – 8644
SHORT TO GROUND
6-86
Table 6-11. Diagnostic Trouble Code Chart
Fault Condition/Trigger
(For configurable items, fault applies only if
configured. All listed conditions to be met
unless stated otherwise)
The control system has determined that the load sensor
reading has not deviated by more than 1lb for 5s while
operating drive or boom functions at greater than creep
speed.
This fault, once annunciated is latched within a given
key cycle.
The shear beam is reporting an internal issue with the
strain gauge 1 sensor.
If the platform is not overloaded the machine will be
placed in to creep.
If DTC 8238 is also active the machine will assume the
platform is overloaded.
This fault, once annunciated is latched within a given
key cycle.
The shear beam is reporting an internal issue with the
strain gauge 2 sensor.
If the platform is not overloaded the machine will be
placed in to creep.
If DTC 8237 is also active the machine will assume the
platform is overloaded.
This fault, once annunciated is latched within a given
key cycle.
The UGM detects an open circuit at this output
The UGM detects a short to battery at this output
The UGM detects a short to ground at this output
The UGM detects an open circuit at this output
The UGM detects a short to battery at this output
The UGM detects a short to ground at this output
Required Control
Conditions Required for Movement
Response or State
and/or to Clear Fault
Assignment
Possible sensor hardware issue.
Possible sensor hardware issue.
Possible sensor hardware issue.
Steer Left and Right speed Power Cycled
limited to Creep (340AJ,
400S, 450AJ);
No response required for
this DTC (18RS, 24RS)
Disable UGM Drive For- Power Cycled
ward/Reverse and Steer
Left/Right outputs
Disable UGM Steer Left Power Cycled
and Right outputs
Steer Left and Right speed Power Cycled
limited to Creep(340AJ,
400S, 450AJ);
No response required for
this DTC (18RS, 24RS)
Disable UGM Drive For- Power Cycled
ward/Reverse and Steer
Left/Right outputs
Disable UGM Steer Left Power Cycled
and Right outputs
X X
X X
X X
X X
X X
X X
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