JLG 18RS Service Manual - Manual (Page 194)

SECTION 6 - JLG CONTROL SYSTEM
6-52 – JLG Lift – 3121284
LSS BATTERY VOLTAGE TOO
LOW 444 The machine is configured with and Load Sensing System and the
Ground Module detects that the LSS reports supply voltage less than
9.0 volts. Ground Module to set Platform
Load State = Overloaded LSS reports voltage greater
than 9.0V
BATTERY VOLTAGE LOW 445 The Ground Module detects that its supply voltage < 11 volts for 5
seconds while none of the following conditions exist:
Engine is not cranking
Emergency Descent Mode is not active
Glow Plugs are not energized No functions are inhibited Voltage is greater than 11.25
volts
CANBUS FAILURE – PLAT-
FORM MODULE 662 Ground Module does not receive any CAN messages from the Plat-
form Module in 250ms All functions will be deceler-
ated to zero and generator will
be disabled. If machine
equipped with Dual Fuel
engine, state of Fuel Selection
switch shall be retained until
CAN Bus 1 is restored. Reactiva-
tion of Footswitch is required to
resume operation. With power off, disconnect the
boom cable at the bottom of
the Platform box. With a multi-
meter, verify that the resistance
between the CAN1H and CAN1L
pins of the boom cable is
approximately 120ohms. Verify
the same at the connector
entering the bottom of the box.
If Okay, connect cable at plat-
form and disconnect cable at
connection near turntable.
Check in the same manner then
continue splitting and measur-
ing in the manner over remain-
der of machine CAN Bus. When
a bad reading occurs, check
wire continuity on the individ-
ual wire.
Fault is cleared when CAN mes-
sages are received from the
Platform Module
CANBUS FAILURE – LOAD
SENSING SYSTEM MODULE 663 MACHINE SETUP  LOAD SYSTEM is not set = NO
Ground Module does not receive any CAN messages from the LSS
module in 250ms
Ground Module to assume Plat-
form Load State = Overloaded CAN messages are received
from the LSS module
CANBUS FAILURE – ENGINE
CONTROLLER 666 An engine with a CAN engine controller is configured in MACHINE
SETUP
No CAN messages are received from the engine controller for more
than 250ms Ground Module shall decel all
functions, set Target engine
RPM = Mid-Engine if Engine
State ENGINE STOPPED, and
assume Engine Controller
reporting mid-Engine; other-
wise Engine State = ENGINE
STOPPED. If MACHINE SETUP
 GENERATOR = YES, Genera-
tor Relay output to be turned
off until re-enabled by opera-
tor. Reactivation of Footswitch
is required to resume opera-
tion. With power off, disconnect the
CAN2 cable going to the engine
at the tee near the UGM. With a
multimeter, verify that the
resistance between the
CAN2H and CAN2L pins is
approximately 120ohms both
in the path to engine and path
to UGM. If a bad reading occurs,
check wire continuity on indi-
vidual wires. CAN messages are
received from the engine con-
troller. Ground Module shall
require re-activation of Foot-
switch to enable functions.
Table 6-5. 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