JLG 450A_AJ Series II Service Manual - Manual (Page 151)

SECTION 3 - CHASSIS & TURNTABLE
3121290 – JLG Lift – 3-111
The desired action is set by OEM calibration engineers.
Fault/Diagnostic Trouble Code Interaction
All fault and diagnostic information is managed through the
Faults page. Interaction includes viewing fault messages,
downloading fault data (fault snapshot and flight data
recorder), erasing faults from memory, and defining variables
for fault data logging.
Faults are separated into two categories, Active and Historic.
Active faults are active in real-time and historic faults have
been generated at some instance in time that may or may not
be active in real-time. Once a fault has become active, it is
immediately logged as historic and a snapshot and flight data
log is saved. Figure 3-72. shows an example of the fault page
when an active fault has been generated. Notice fault is pres-
ent in active and historic lists and the Malfunction Indicator
Lamp (MIL) has been illuminated. Figure 3-73. shows an exam-
ple of the fault page with a historic fault stored in memory.
Table 3-16. Diagnostic Corrective Actions
CORRECTIVE ACTION DESCRIPTION
Enable Enables the fault for fault detection
Shutdown Cause an engine shutdown when fault becomes active
Never Forget Retain fault as historic/previously active until cleared by a technician and does not allow historic fault to be “auto-cleared”
Turn on MIL Turn on MIL output when fault becomes active
CL Disable Disable closed-loop while the fault is active
CL Disable Key- Cyc Disable closed-loop while the fault is active and for the remainder of the key cycle
AL Disable Disable adaptive learn while the fault is active
AL Disable Key-Cyc Disable adaptive learn while the fault is active and for the remainder of the key cycle
Power Derate 1 Limit TPS to the Power Derate 1 percent set in the diagnostic calibration while the fault is active. The Power Derate 1 TPS percent should be set higher
than Power Derate 2 as Power Derate 2 adds a higher level of protection.
Power Derate 2 Limit TPS to the Power Derate 2 percent set in the diagnostic calibration while the fault is active. If the calibration is set to “Latched for Key-Cycle”
Power Derate 2 remains active until engine speed and FPP conditions are satisfied. The Power Derate 2 TPS percent should be set lower than Power
Derate 1 as Power Derate 2 adds a higher level of protection.
Low Rev Limit Limit RPM to the Low Rev Limit speed set in the diagnostic calibration while the fault is active. If the calibration is set to “Latched for Key-Cycle” Low
Rev Limit remains active until engine speed and FPP conditions are satisfied.
Forced Idle Limit RPM to the Forced Idle speed set in the diagnostic calibration while the fault is active and for the remainder of the key cycle
Soft Warning Turn on the soft warning output when the fault becomes active
Hard Warning Turn on the hard warning output when the fault becomes active
Stopped Check Run fault detection/checking while the engine is in a key-on, engine-off condition. NOTE: It is recommended that this feature only be used for general
sensor faults (high/low voltage) and some output drivers