SECTION 3 - CHASSIS & TURNTABLE
3121623
– JLG Lift –
3-17
Engines & Controls Adjustments And
Troubleshooting
Experience of engine doesn’t start or not run correctly, fol-
lowing this procedure to recognize an engine trouble, or a
machine control system problem.
The electrical test requires disconnecting the engine har-
ness from the machine harness system and then start the
engine isolate from the machine.
As well if the engine starts then need inspecting the
machine system, otherwise refer to the Engine Service
manual for the troubleshooting or contact the local
engine service.
Other than further the suggestion of the engine controls.
These instructions are valid for engines with and with no
key start switch.
If the engine is not cranking, go to the instructions
“Engine Harness By-Pass”.
Figure 3-26.
Check the status of the LED on the carburetor control unit.
Figure 3-27.
Led on ECM carburetor
• LED OFF
Battery or key switch malfunction
Fuse 3A or 30A blown
Wires harness failure
ECM failure.
• LED ON
Fuel; or Spark issue
(See Fuel or Spark Plug Check procedure).
• LED 2 Flashes
Not enough oil
Oil level switch or wire harness short circuit
ECM Failure.
• LED 4 Flashes
Engine temperature sensor or harness short circuit;
ECM Failure.
• LED 6 Flashes
Power coil or harness short circuit
ECM Failure.
• LED 8 Flashes
ECM Software failure
Figure 3-28.
Position of the Fuses 3Amp and 30Amp
Figure 3-29.
Location of the Engine temperature sensor
Go
to
Discount-Equipment.com
to
order
your
parts
