JLG 340AJ, Service And Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-85
LSS STRAIN GAUGE 1 - A/D
DEFECT 8237 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 over-
loaded.
This fault, once annunciated is latched within a given key cycle.
Possible sensor hardware issue.
LSS STRAIN GAUGE 2 - A/D
DEFECT 8238 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 over-
loaded.
This fault, once annunciated is latched within a given key cycle.
Possible sensor hardware issue.
LSS CELL #4 ERROR 824 MACHINE SETUP

LOAD SYSTEM is not set = NO
The Ground Module detects that LSS is reporting error with Cell #4.
Ground Module to assume Plat-
form Load State = Overloaded CAN messages are received
from the LSS module.
LSS HAS NOT BEEN CALI-
BRATED 825
The load sensing system is configured but has not been calibrated.
The machine will assume the platform is overloaded.
Ground Module to assume Plat-
form Load State = Overloaded
Calibrate the load sensing sys-
tem.
RUNNING AT CREEP – PLAT-
FORM OVERLOADED 826 Machine Setup

LOAD SYSTEM = WARN ONLY
The platform is Overloaded
Ground mode is active with Emergency Descent mode not active or
Platform mode is active
Refer to Table 6-16, Overload
Variations for machine
response. Not all of the trigger conditions
are met
DRIVE & BOOM PREVENTED –
PLATFORM OVERLOADED 827 The Platform is Overloaded and
Machine Setup

LOAD SYSTEM = CUTOUT PLATFORM, Platform
Mode is active, and conditions of Table 6-16, Overload Variations
apply.
-or-
The Platform is Overloaded and Machine Setup

LOAD SYSTEM =
CUTOUT ALL and conditions of Table 6-16, Overload Variations apply.
Refer to Table 6-16, Overload
Variations for machine
response. Not all of the trigger conditions
are met
LIFT UP & TELE OUT PRE-
VENTED – PLATFORM OVER-
LOADED 828 MACHINE SETUP

LOAD SYSTEM = SPECIAL 1
Platform Mode is active
The platform is Overloaded
Refer to Table 6-16, Overload
Variations for machine
response. Not all of the trigger conditions
are met
LSS READING UNDER WEIGHT 8211 MACHINE SETUP

LOAD SYSTEM NO
The load sensor has been calibrated and Gross Platform Weight <
(0.5 * Empty Platform Weight).
Ground Module to set Platform
Load State = Overloaded Not all of the trigger conditions
are met
FRONT LEFT STEER VALVE –
OPEN CIRCUIT 8639 The Ground Module detects an open circuit at the Front Left Steer
Valve output. Steer Left and Right speed are
limited to Creep Cycle power to clear the fault.
FRONT LEFT STEER VALVE –
SHORT TO BATTERY 8640 The Ground Module detects a short to battery at the Front Left Steer
Valve output. The Ground Module disables
the Drive Forward/Reverse and
Steer Left/Right outputs. Cycle power to clear the fault.
Table 6-15. Fault Code Troubleshooting Information
Help Message DTC Condition Producing DTC
Control System Response or
Machine Condition
Corrective Action/
Operational Requirement
for Function Movement
and/or to Clear Fault