Page E-2
ELECTRONIC SPEED CONTROL - TCT
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notices, Cautions, Dangers and Warnings.
At monthly intervals, test the TCT system by allowing
the vehicle to roll down an incline with the accelerator
pedal released. Braking force should be felt at approxi-
mately 2 mph (3 kph) indicating that the TCT system is
functioning. If vehicle speed continues to rise, apply the
service brake to control speed and proceed with diag-
nostic check.
Charging the vehicle will also de-activate the diagnostic mode
and the handheld diagnostic tool will not operate
The two-position ‘Run-Tow/Maintenance’ switch is
located under the passenger side of the seat on the ESC
environmental cover (Ref. Fig. 1 on Page E-2).
TRUCOURSE TECHNOLOGY (TCT)
SYSTEM™
OPERATION
With the switch in ‘TOW/MAINTENANCE’ position:
• the controller is deactivated
• the electronic braking feature is deactivated which
allows the vehicle to be towed or roll freely
• the warning beeper is deactivated
• With the switch in ‘RUN’ position:
• the controller is activated
• the electronic braking feature and warning beeper
features are activated
Fig. 1 Run-Tow/Maintenance Switch
TCT vehicles operate only in the ‘RUN’ position.
If all of the following events occur with the switch in
‘RUN’ position
a) the vehicle has been stopped for more than one
second
b) the accelerator pedal has been released for more
than one second
c) the vehicle begins to roll above 2 mph (3 kph)
the electronic braking will limit speed to approximately 2
mph (3 kph) and the warning beeper will sound. When
the accelerator pedal is depressed, the electronic brak-
ing and warning beeper will be overridden and normal
vehicle operation resumes. The system functions in all
key switch positions.
The TCT system is not a substitute for the ser-
vice brake which should be used to control
speed and reduce possibility of injury.
If all of the following events occur with the switch in
‘RUN’ position
a) the vehicle is being driven down a slope
b) the vehicle speed exceeds the designed speed
with the accelerator pedal depressed or released.
the regenerative braking will limit the speed of the vehi-
cle to the designed speed range.When the regenerative
braking feature is activated by this sequence of events,
the motor generates power which is returne d to the bat-
teries. TCT models are equipped with a regenerative
motor control system.
The motor’s speed is sensed and regulated directly by
the controller. As a vehicle begins to accelerate while
descending a hill, the speed sensor will cause the motor
to electrically resist the speed of the vehicle through
regenerative braking.
If the operator attempts to override the electronic brak-
ing feature by moving the direction selector or key
switch to another position, the warning beeper will sound
and the vehicle will brake rapidly until it reaches the
speed of approximately 2 mph (3 kph).
The TCT system also incorporates an anti-stall protec-
tion feature that prevents commutator damage from
stalling the vehicle against an obstacle or ascending a
hill. The electrical power to the motor will be deactivated
allowing the vehicle to roll freely before damage can be
done.
In Performance Mode option (See chart on page 1) fea-
tures different degrees of regenerative breaking that
takes place anytime that accelerator pedal is released.
The Steep Hill option will rapidly slow the vehicle to a
stop unless the accelerator pedal is depressed. The Mild
NOTICE
Controller
Environmental
Cover
Run-Tow/Maintenance Switch
NOTICE
