JLG 340AJ Service Manual - Manual (Page 309)

SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-65
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.
CANBUS FAILURE – EXCESSIVE
CANBUS ERRORS 6613 More than 22 error frames per second for 4 seconds or more than 500
Buss Off conditions since last power cycle. No functions are inhibited. Cycle power to clear the fault.
CANBUS FAILURE – TCU MOD-
ULE 6622 MACHINE SETUP  CLEARSKY = YES
No CAN2 messages are received from the TCU module for more than
30 seconds
No functions are inhibited. CAN messages are received
from the TCU module.
REMOTE CONTRACT MANAGE-
MENT OVERRIDE – ALL FUNC-
TIONS IN CREEP 681 MACHINE SETUP  CLEARSKY = YES
Value set by ClearSky TCU
Puts the machine into Creep
and locks into Transport Cleared by ClearSky TCU
Table 6-10. 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