JLG 510AJ Service Manual - Manual (Page 359)

SECTION 6 - JLG CONTROL SYSTEM
3121181 – JLG Lift – 6-77
4/2 Flash code 4/2 indicates that the engine is over temperature.
NOT REQUIRED
4/3 Flash code 4/3 indicates engine problems. Except where noted,
these faults are not reported during 2 second power-up
sequence. 9
HIGH ENGINE TEMP Occurs when engine temperature is above 117 degrees Celsius for
Ford engines, and above 130 degrees Celsius for Deutz engines.
AIR FILTER BYPASSED Air filter clogged
NO ALTERNATOR OUTPUT The engine has been running for 15 seconds or more and the battery
voltage is still below 11.5 volts.
LOW OIL PRESSURE If a Deutz engine is configured, the oil pressure is below 8 PSI and the
engine has been running for at least 10 seconds. If a Ford engine is
configured, the Ford ECM has reported a low oil pressure fault.
OIL PRESSURE SHORT TO BATTERY If a Deutz engine is configured, this indicates that the oil pressure
sensor is reading above 6.6 volts.
OIL PRESSURE SHORT TO GROUND If a Deutz engine is configured, this indicates that the oil pressure
sensor is reading below.1 volts for more than 5 seconds. This fault is
not detected during crank.
COOLANT TEMPERATURE SHORT TO
GROUND If Deutz engine is configured, this indicates coolant temperature is
reading below.1 volts.
FORD FAULT CODE ## All Ford fault codes except 63 are simply passed through from the
FORD ECM. They only occur if a Ford engine is selected in machine
configuration. Can be reported during power-up sequence.
ENGINE FAULT CODE :
###(SPN) :###(FMI) All J1939 CANBUS ECMs report fault messaging in this format. The
SPN number represents what is broken and FMI number represents
how the component is broken.
FORD FAULT CODE UNKNOWN An unrecognized Ford ECM fault code has been received. Can be
reported during power-up sequence.
485 COMMUNICATIONS LOST This fault only occurs with a Ford engine when no responses are
received from the ECM for 2.5 seconds. Can be reported during
power-up sequence.
FUEL SENSOR SHORT TO BATTERY Indicates fuel sensor is reading above 4.3 volts.
FUEL SENSOR SHORT TO GROUND Indicates fuel sensor is reading below.2 volts.
WRONG ENGINE SELECTED – ECM PRES-
ENT Indicates an Engine Control Module (ECM) has been detected on the
CANBUS. This fault will only be applicable when non-CANBUS
engine setups are configured.
ECM CAN COMMUNICATION LOST Engine is configured to have a CANBUS controlled engine and the
JLG system does not detect an ECM. This fault can be the result of
power lost to the ECM or a break in CANBUS communications con-
nection from ECM to JLG system.
Table 6-9. Help Fault Codes, Displayed Faults, and Descriptions
Fault Flash
Code
Analyzer Display Description Priority