SECTION 3 - CHASSIS & TURNTABLE
3-98
– JLG Lift –
3121160
535
TPS1 Higher Than TPS2
This fault will set if TPS1 is 20% (or more) higher than TPS2. At this
point the throttle is considered to be out of specification, or there is a
problem with the TPS signal circuit. During this active fault, the MIL
light will be on and the engine will shut down.
536
TPS1 Lower Than TPS2
This fault will set if TPS1 is 20% (or more) lower than TPS2. At this
point the throttle is considered to be out of specification, or there is a
problem with the TPS signal circuit. During this active fault, the MIL
light will be on and the engine will shut down.
537
Throttle Unable To Open
This fault will set if the throttle command is 20% or more than the
actual throttle position. During this active fault the MIL light will be on
and the engine will shut down.
538
Throttle Unable To Close
This fault will set if the throttle command is 20% less than the actual
throttle position. During this active fault the MIL light will be on and the
engine will shut down.
545
Governor Interlock Failure
This fault will set if Gov. 1, 2, or 3 are enabled and the EPM does not
detect a ground from the brake switch input. During this active fault
the MIL light will be on and Power Derate (level 1) and the Low Rev
Limit will be enforced. When these are enforced the maximum throt-
tle position is 50% and the maximum engine speed is 1600 RPM. The
Low Rev Limit is enforced for the remainder of the key-on cycle. If the
active fault is no longer present, the MIL light will flash at 2 Hz for the
remainder of the key-on cycle. This is a reminder that the Low Rev
Limit is still enforced.
551
Max Govern Speed Override
This fault will set anytime the engine RPM exceeds 4500 for 2 sec-
onds or more continuously. This speed overrides any higher max
governor speeds programmed by the user. This is to help prevent
engine or equipment damage.
552
Fuel Rev Limit
This fault will set anytime engine RPM exceeds 4800 for 2 seconds or
more continuously. When these conditions are met, the EPM shuts
off the fuel injectors. This is to help prevent engine or equipment
damage.
NOTE: If any other DTCs are present, diagnose those first.
553
Spark Rev Limit
This fault will set anytime the engine RPM exceeds 4900 for 2 sec-
onds or more continuously. When these conditions are met, the EPM
will shut off spark to the engine. This is to help prevent engine or
equipment damage.
NOTE: If any other DTCs are present, diagnose those first.
611
COP Failure
Several different things can happen within the microprocessor that
will cause this fault. The EPM will reset itself in the event this fault is
set, and the MIL will be on until the code is cleared. This fault should
be erased after diagnosis by removing battery power. It will not self-
erase.
During this active fault, Power Derate (level 2) will be enforced. When
this is enforced, maximum throttle position will be 20%. This is
enforced until the fault is manually cleared.
Table 3-11. EPM Diagnostic Trouble Codes
Diagnostic
Trouble
Code
Description
Cause for Setting DTC
Summary of Contents for 740A
Page 1: ...Service and Maintenance Manual Models 740A 740AJ P N 3121160 January 8 2013 ...
Page 2: ......
Page 52: ...SECTION 2 GENERAL 2 12 JLG Lift 3121160 NOTES ...
Page 109: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 57 Figure 3 39 Swing Hub ...
Page 135: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 83 Figure 3 48 Rotary Coupling Port Location ...
Page 153: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 101 Figure 3 54 EFI Component Location ...
Page 156: ...SECTION 3 CHASSIS TURNTABLE 3 104 JLG Lift 3121160 Figure 3 55 ECM EPM Identification ECM EPM ...
Page 173: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 121 Figure 3 65 EMR2 Fault Codes Sheet 1 of 5 ...
Page 174: ...SECTION 3 CHASSIS TURNTABLE 3 122 JLG Lift 3121160 Figure 3 66 EMR2 Fault Codes Sheet 2 of 5 ...
Page 175: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 123 Figure 3 67 EMR2 Fault Codes Sheet 3 of 5 ...
Page 176: ...SECTION 3 CHASSIS TURNTABLE 3 124 JLG Lift 3121160 Figure 3 68 EMR2 Fault Codes Sheet 4 of 5 ...
Page 177: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 125 Figure 3 69 EMR2 Fault Codes Sheet 5 of 5 ...
Page 244: ...SECTION 4 BOOM PLATFORM 4 28 JLG Lift 3121160 Figure 4 14 Rotator Assembly HELAC ...
Page 286: ...SECTION 4 BOOM PLATFORM 4 70 JLG Lift 3121160 NOTES ...
Page 307: ...SECTION 5 HYDRAULICS 3121160 JLG Lift 5 21 Figure 5 17 Variable Displacement Pump Rexroth ...
Page 316: ...SECTION 5 HYDRAULICS 5 30 JLG Lift 3121160 NOTES ...
Page 319: ...SECTION 6 JLG CONTROL SYSTEM 3121160 JLG Lift 6 3 Figure 6 2 ADE Block Diagram ...
Page 328: ...SECTION 6 JLG CONTROL SYSTEM 6 12 JLG Lift 3121160 Figure 6 11 Control Module Location ...
Page 374: ...SECTION 6 JLG CONTROL SYSTEM 6 58 JLG Lift 3121160 NOTES ...
Page 406: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 32 JLG Lift 3121160 NOTES ...
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