JLG 450AJ ANSI Operator Manual - Manual (Page 38)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3-8 – JLG Lift – 3120748
17. Low Fuel Level Indicator.
When illuminated indicates that the fuel level is 1/8
full or less. When the light first turns on, there are
approximately four usable gallons of fuel remaining.
18. Glow Plug Wait Indicator.
When illuminated, indicates the glow plugs are on.
The glow plugs are automatically turned on with the
ignition circuit and remain on for approximately
seven seconds. Start the engine only after the light
goes out.
19. Engine Malfunction Indicator Light (Ford Engines
after S/N 46089).
When illuminated, indicates that the Engine Control
Module has detected a malfunction in the Electronic
Fuel Injection System and a Diagnostic Trouble
Code has been set in the ECM. Refer to the Service
Manual for instructions concerning the trouble
codes and trouble code retrieval.
The malfunction indicator light will illuminate for 2-3
seconds when the key is positioned to the on posi-
tion to act as a self test.
20. EFI System Test Button (Ford Engines after S/N
46089).
By pushing and holding the system test button on
the side of the ground control box, the Diagnostic
Trouble Codes will be displayed on the Malfunction
Indicator Light. Refer to the Service Manual for
instructions concerning the trouble codes and trou-
ble code retrieval.
Figure 3-5. Malfunction Indicator Light and Test Button
Updated 9-21-99