Calibration
POWER ASSIST STEERING SENSOR
WARNING
If at any time a tiller handle slowly moves in one
direction during startup, it is likely calibration
needs to be performed.
Power assist steering calibration should be performed if ei-
ther the torque sensor or EPAS unit is serviced or replaced
or anytime the drive tire is replaced.
1.
Position the lift truck on a normal, smooth surface
floor away from personnel or other equipment.
2.
Turn the key switch to the
OFF
position and remove
the drive unit compartment cover.
3.
The Calibration Tab is an unconnected wire with a fe-
male spade connector hanging near the ETACC CAN
connector. Attach the Calibration Tab to the B+ termi-
nal of the controller, using a 914 mm (36 in.) 14 Ga.
jumper wire with an alligator clip on one end and a
male spade connector on the other.
WARNING
DO NOT interfere with the lift truck or tiller handle
during the calibration cycle.
4.
Standing clear of the steer handle, turn the key switch
to the
ON
position.
5.
The lift truck will start up in calibration mode and the
tiller handle will begin to move on its own power dur-
ing the calibration cycle.
6.
Wait at least 5 seconds after the calibration cycle has
ended (the tiller has stopped moving) and remove the
jumper wire.
7.
Wait at least 5 seconds after the jumper wire is re-
moved and cycle the key switch to the
OFF
position
and then back to the
ON
position.
8.
Check the lift truck for proper operation. Reinstall the
drive unit compartment cover.
Repairs
WARNING
DO NOT make repairs or adjustments unless you
have been properly trained and authorized to do
so. Improper repairs and adjustments can create
dangerous operating conditions. DO NOT operate
a lift truck that needs repairs. Report the need for
repairs to your supervisor immediately. If repair is
necessary, attach a DO NOT OPERATE tag to the
control handle and disconnect the battery.
Disconnect the battery and separate the connec-
tor before opening the drive unit compartment
cover or inspecting or repairing the electrical sys-
tem. If a tool causes a short circuit, the high cur-
rent flow from the battery can cause personal in-
jury or property damage.
The capacitor in the transistor controller can hold
an electrical charge after the battery is disconnec-
ted. To prevent electrical shock and personal in-
jury, discharge the capacitor before inspecting or
repairing any component in the drive unit com-
partment. See Discharging the Internal Capacitors
in this section.
All checks, adjustments, and repairs in the drive unit com-
partment are done with the compartment cover removed.
Remove the drive unit compartment cover for access to the
electrical components and discharge the capacitor. See Ac-
cessing the Drive Unit Compartment in this section.
2200 SRM 1640
Calibration
7
