JLG 740AJ, Руководство по обслуживанию и ремонту

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SECTION 3 - CHASSIS & TURNTABLE
3-148 3121160
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 throttle 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 seconds 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 seconds 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.
612 Invalid Interrupt 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.
613 A/D Loss 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.
614 RTI 1 Loss 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 3-13. EPM Diagnostic Trouble Codes
Diagnostic
Trouble
Code
Description Cause for Setting DTC