JLG 660SJ Service Manual User Manual
Page 274
SECTION 6 - JLG CONTROL SYSTEM
6-28
– JLG Lift –
3121202
JIB LEFT OPEN CIRCUIT
JIB RIGHT SHORT TO BAT-
TERY
JIB RIGHT SHORT TO
GROUND
JIB RIGHT OPEN CIRCUIT
PLATFORM CONTROL VALVE
SHORT TO BATTERY
Only occurs on machines with electronic basket leveling
PLATFORM CONTROL VALVE
SHORT TO GROUND
Only occurs on machines with electronic basket leveling
PLATFORM CONTROL VALVE
OPEN CIRCUIT
Only occurs on machines with electronic basket leveling
3/5
Flash code 3/5 indicates a brake pressure problem.
NOT REQUIRED
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 volt-
age is still below 12.5 volts.
LOW Oil PrESSURE
If a Deutz engine is installed, the oil pressure is below 8 PSI and the engine
has been running for at least 10 seconds. If a Ford engine is installed, the
Ford ECM has reported a low oil pressure fault.
OIL PRESSURE SHORT TO
BATTERY
If a Deutz engine is installed, this indicates that the oil pressure sensor is
reading above 6.6 volts.
OIL PRESSURE SHORT TO
GROUNd
If a Deutz engine is installed, this indicates that the oil pressure sensor is
reading below 0.1 volts for more than 5 seconds. This fault is not detected
during crank.
COOLANT TEMPERATURE
SHORT TO GROUND
If a Deutz engine is installed, 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 configu-
ration digits. Can be reported during power-up sequence.
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.
Table 6-2. Help Fault Codes, Displayed Faults, and Descriptions
Fault Flash
Code
Communicated (Displayed on
Analyzer) Fault
Description
Priority