Tilt Sensor Calibration; Failure Troubleshooting For The Field - Oshkosh JLG 1930ES Service Maintenance Manual

CHANGING THESE SETTINGS MAY ADVERSELY AFFECT THE PER-
FORMANCE OF YOUR MACHINE.
NOTICE
IT IS A GOOD PRACTICE TO AVOID PRESSURE-WASHING ELEC-
TRICAL/ELECTRONIC COMPONENTS. SHOULD PRESSURE-WASH-
ING BE UTILIZED TO WASH AREAS CONTAINING ELECTRICAL/
ELECTRONIC COMPONENTS, JLG INDUSTRIES, INC. RECOM-
MENDS A MAXIMUM PRESSURE OF 750 PSI (52 BAR) AT A MINI-
MUM DISTANCE OF 12 INCHES (30.5 CM) AWAY FROM THESE
COMPONENTS. IF ELECTRICAL/ELECTRONIC COMPONENTS ARE
SPRAYED, SPRAYING MUST NOT BE DIRECT AND BE FOR BRIEF
TIME PERIODS TO AVOID HEAVY SATURATION.
The flash code is indicated on the face of the platform
control box as shown:
SYSTEM FAULT
Diagnostic Trouble Codes are indicated on the MDI for
those machines that are equipped with an MDI. (refer to
Section 3.7).
NOTE: Flash codes and DTC's are also displayed on the
handheld analyzer. For descriptions see, Table 5-2,
Flash Code Listing.
3121656
SECTION 5 - JLG CONTROL SYSTEM
5.3

TILT SENSOR CALIBRATION

Be sure that the machine is parked and stowed on level
ground.
NOTE: Tilt Sensor Calibration can not be performed if the
main contactor switch is open due to an alarm.
1. Enter Access Level 1 and go to the CALIBRATION/
TILT SENSOR/LEVEL VEHICLE screen.
2. Choose the right arrow key to view the raw, uncali-
brated tilt sensor values. If either raw angle reads
±5.0 or more, the machine is too unlevel and the
software will prohibit calibration. Therefore,
attempt to dissect the three areas of error to find
the primary contributor:
a. Machine mounting and/or grade:
Try to measure the top of the Ground Control
box for levelness. If unable to get a good read-
ing, unbolt the Ground Control box and check
the box's mounting surface for levelness.
b. Tilt sensor mounting on machine or wedged
crooked in control box:
If the machine mounting/grade appears
acceptable, remove and open the Ground Con-
trol box carefully. Observe whether the tilt sen-
sor is properly seated.
c. Tilt sensor has developed an offset shift:
Remove the tilt sensor from the Ground Con-
trol box but keep both the tilt sensor and
Ground Control box electrically connected.
Level one axis of the tilt sensor and observe
the raw reading (should be within ± 2.0). Do
the same for the other axis. If either axis is
greater than ± 2.0, replace the tilt sensor.
NOTE: Check that the tilt switch is properly set by referring
to the Tilt Settings table in Section 1 of this manual.

Failure Troubleshooting for The Field

Some possible reasons that the tilt sensor will not cali-
brate are:
a. The surface the machine is sitting on is off level
by a few degrees (flat doesn't imply level; park-
ing lots are often not level).
b. The tilt sensor has failed one or both of the
channels (X axis and Y axis).
c. Tilt sensor has moisture intrusion that has
shifted its output.
d. Water and/or corrosion in the box has cor-
rupted electrical connections or caused a tilt
sensor or ground control board failure
(observe any cracks in the box).
e. The Ground Control Box, as mounted on the
machine, does not allow the tilt sensor to be
level.
5-5