Tilt Sensor Calibration:
1. Drive the machine onto
a measured level surface
(±0.5° for both x and y axis).
2. Using the Analyzer, go to MENU: CALIBRATION;
TILT SENSOR. Press Enter.
LEVEL VEHICLE will dis-
play. Press Enter again to calibrate.
3. Both axis’ raw angles need to be within
wise the machine is too unlevel and the software will
prohibit calibration. Should this occur, attempt to
dissect the three areas of
error to find the primary
a. Machine mounting and/or grade:
With a digital level, measure the top of the
Ground Control box for levelness. If unable to
get a good reading, 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 accept-
able, open the Ground Control box carefully.
Observe whether the tilt sensor is properly
c. Tilt sensor has developed an offset shift:
Remove the tilt sensor from the Ground Control
box, but keep both the tilt sensor and Ground
Control box electrically
connected. Level one
axis of the tilt sensor and observe the raw read-
ing (should be within ±2.0°). Do the same for the
other axis. If either axis
is greater than ±2.0°,
replace the tilt sensor.
Some possible reasons that the tilt sensor will not cali-
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 corrupted
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
For the following troubleshooting steps, a bubble level
(smaller is better) will be
needed and the machine must
be on a level surface:
1. On the Analyzer, go to Diagnostics/System and read
the tilt angle. If either angle reports +20.0°, there is
an electrical/electronic failure (tilt sensor, control
board, electrical connections).
a. Open the Ground Control Box.
b. Disconnect the sensor and clean any corrosion
off of the tilt sensor and control board connec-
c. Reassemble and test. If fault persists, replace tilt
2. If the Analyzer displays angles other than +20.0°,
attempt to calibrate. If machine will not calibrate,
note the reason displayed on Analyzer:
a. SENSOR FAILURE – tilt sensor internal fre-
quency is out of range (replace sensor).
b. NOT LEVEL - tilt sensor has either developed an
offset or it is too unlevel as mounted on the
Tilt sensor wiring ( Sensor is located and mounted inside the control box to the top by 4 screws):
Wire Color-Function-Connector Pin
Red- VCC- 1
Green- PWMX- 2
White- PWMY- 3
Black- Ground- 4
Check for levelness of the sensor and control box as described, inspect/test harness and ground, or replace faulty sensor and relevel the sensor. Let me know