JLG 460SJ Operator Manual - Manual (Page 57)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3121216 – JLG Lift – 3-19
5. Enable Indicator
Indicates that the footswitch is depressed and the platform
controls are ready for use. To enable the controls, depress
the footswitch and select any function within seven sec-
onds. The controls will then remain active as long as there is
not a delay of seven seconds between stopping one func-
tion and starting the next one. If the seven second interval
is exceeded, the enable light will go out and the controls
will not operate. To enable the controls again, remove your
foot from the footswitch and depress the footswitch.
6. Glow Plug Indicator
Illuminates when the glow plugs are operating. Wait until
the light goes out before cranking engine.
7. Malfunction Indicator
On machines prior to S/N 61718, the light turns on and an
alarm sounds when machine’s power system requires
immediate service. Any of the following conditions will turn
on light and alarm: low engine oil pressure, high engine
coolant temperature, clogged engine air filter, low alterna-
tor output, clogged hydraulic oil return filter, or clogged
charge pump filter.
On machines from S/N 61718 to present, the light indicates
that the Control System has detected a malfunction and a
Diagnostic Trouble Code has been set in the system mem-
ory. Refer to the Service Manual for instructions concerning
the trouble codes and trouble code retrieval.
The malfunction indicator light will illuminate for 2-3 sec-
onds when the key is positioned to the on position to act as
a self test.