Oshkosh JLG 400S, Service And Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM (S/N 61718 TO PRESENT)
3120895 – JLG Lift – 6-33
4/2 Flash code 4/2 indicates that the engine is over temperature. NOT
REQUIRED
4/3 Flash code 4/3 indicates problems with the engine. Except where noted,
these faults are not reported during 2 second power-up sequence. 9
HIGH ENGINE TEMP Occurs when the engine temperature is above 117 degrees Celsius for the
Ford engines, and above 130 degrees Celsius for the 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 0.1 volts for more than 5 seconds. This fault is not detected dur-
ing crank.
COOLANT TEMPERATURE SHORT
TO GROUND If a Deutz engine is configured, this indicates that the coolant temperature is
reading below 0.1 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 the machine configuration digits.
Can be reported during power-up sequence.
ENGINE FAULT CODE :
###(SPN) :###(FMI) All J1939 CANBUS ECMs will report fault messaging in this format. The SPN
number represents what is broken and FMI number represents how the com-
ponent 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. It occurs 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 that the fuel sensor is reading above 4.3 volts.
FUEL SENSOR SHORT TO GROUND Indicates that the fuel sensor is reading below 0.2 volts.
WRONG ENGINE SELECTED — ECM
PRESENT Indicates an Engine Control Module (ECM) has been detected on the CAN-
BUS. This fault will only be applicable when non-CANBUS engine setups are
configured.
ECM CAN COMMUNICATION LOST The engine is configured to have a CANBUS controlled engine and the JLG
system does not detect the presence of an ECM. This fault can be the result of
the power lost to the ECM or a break in the CANBUS communications connec-
tion from the ECM to the JLG system.
4/4 Flash code 4/4 indicates problems with the battery supply. Not reported
during 2 second power-up. 7
BATTERY LOW Battery voltage is below 11V for more than 5 seconds. This fault is not detected
during crank. This is a warning — the controller does not shut down.
BATTERY TOO HIGH — SYSTEM SHUT
DOWN Battery voltage is above 16V. EMS recycle required.
BATTERY TOO LOW — SYSTEM SHUT
DOWN Battery voltage is below 9V.
Table 6-3. Help Fault Codes, Displayed Faults, and Descriptions - S/N 66995 to Present
Fault Flash
Code
Communicated (Displayed on
Analyzer) Fault
Description Priority