Engine Fault Codes - Genie GTH-1048 Service Manual

March 2016
5 John Deere models: Open the engine
access cover at the tank side of the machine.
Locate the fuel supply line where it is attached
to the fuel filter/water separator.
Tag, disconnect and plug the fuel supply hose
at the fuel filter/water separator. Cap the
fitting.
Open the engine access cover at the
operator's compartment side of the machine.
Locate the fuel return hose at the fuel pump.
Tag, disconnect and plug the fuel return hose
at the fuel pump. Cap the fitting.
All Models:
6 Open the transmission access cover at the
top of the machine. Locate the transmission
cooler.
7 Tag, disconnect and plug the coolant hoses at
the transmission cooler. Cap the fittings.
8 Tag and disconnect the engine wire
harnesses near the operator's compartment.
9 Remove the air cleaner from the machine.
Remove all intake and exhaust components
which would interfere with the removal of the
engine from the chassis.
10 Remove the fasteners securing the driveshaft
to the transmission. Secure the bearing caps
onto the universal joint of the driveshaft.
Note: Using adhesive tape to secure the caps to
the universal joint may be helpful.
11 Remove the fasteners securing the engine
tray to the chassis.
12 Support and secure the engine tray to a forklift
of adequate capacity.
13 Remove the engine tray from the machine.
Part No. 123701
4-2 Engi ne Fault C odes
4-2

Engine Fault Codes

How to Retrieve Engine Fault
Codes
When the engine Electronic Control Module (ECM)
detects an abnormal operating condition, a fault
code is immediately stored in the ECM memory. At
the same time, a colored warning lamp is
illuminated and the fault code is shown on the
engine diagnostic display, is located on the
dashboard in the operator's compartment.
To learn the specifics of and how to use the fault
codes, refer to, Fault Codes Section.
GTH-1048 • GTH-1056
Service Manual
Engines
79
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