JLG 723A Service Manual - Manual (Page 192)

Electrical System
9.84 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
ENGINE TROUBLE
CODE: (SPN):(FMI) 437 1, 2, 3* (ECM will determine the proper
action to take.)
* - The UGM will illuminate just the
engine warning fault indicator if the
DM1 message indicates a warning
or derate condition. The UGM will
illuminate the engine warning and
engine critical fault indicators if the
DM1 message indicates a critical
(shutdown) condition. In the event a
transfer protocol message is
received with multiple faults, a fault
indicating a critical (shutdown) fault
will receive priority when the UGM
determines what indicators to turn
ON.
The ECM detects a fault condition
(not defined in this SRD).
Power cycled
WRONG ENGINE
SELECTED – ECM
DETECTED 4314 1, 2 J2-26 Engage Starter will be
deactivated and inhibited.
The ENGINE CONTROL
configuration is MECHANICAL and
the UGM detects CAN messages
from an ECM.
Power cycled.
HIGH ENGINE
COOLANT
TEMPERATURE
WARNING 4316 1, 2, 12 (For ECM controlled engines, the
ECM may also derate the engine.)
MECHANICAL: The engine coolant
temperature reaches 113×C or
more for a period of at least 10
seconds and an ENGINE
RUNNING state exists.
ELECTRONIC: The ECM detects
the engine coolant temperature has
reached 113×C or more, the ECM
will transmit a J1939 CAN bus DM1
message, or use the J1939 Transfer
Protocol in the event multiple
engine faults exist, on CAN1 to
communicate an engine coolant
temperature warning (SPN:FMI
110:15 or 110:16).
MECHANIAL:
The engine
coolant
temperature
reaches
110×C.
ELETRONIC:
The ECM no
longer
transmits the
condition as
an active fault.
HIGH ENGINE
COOLANT
TEMPERATURE
CRITICAL 4317 1, 2, 3, 12 (For ECM controlled engines, the
ECM may also derate the engine.)
MECHANCIAL: The engine coolant
temperature reaches 118×C or
more for a period of at least 10
seconds and an ENGINE
RUNNING state exists.
ELECTRONIC: The engine coolant
temperature reaches 118×C or
more, the ECM will transmit a J1939
CAN bus DM1 message, or use the
J1939 Transfer Protocol in the event
multiple engine faults exist, on
CAN1 to communicate an engine
coolant temperature critical
(SPN:FMI 110:0).
MECHANIAL:
The engine
coolant
temperature
reaches
115×C.
ELETRONIC:
The ECM no
longer
transmits the
condition as
an active fault.
Message Fault
Code
Indicators Other Actions Taken Trigger for Fault Latch Until