High Pedal Disable Feature; Diagnostic Mode Feature; Operation - Cushman Shuttle 2 Service Manual

ELECTRONIC SPEED CONTROL
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
B
backwards slightly before again stopping in the stalled
condition. This process will repeat itself periodically until
the vehicles is moved from the stalled condition.
Example: If all of the following events occur...
a) the system senses that the accelerator pedal is
depressed (power applied to motor)
b) the brake is engaged so as to prevent vehicle
motion
the controller will sense a stalled motor condition and
remove power from the motor. When the brake pedal is
released, the vehicle will roll backwards slightly before
power is returned to the motor.

High Pedal Disable Feature

High pedal disable prevents undesired acceleration if
the direction selector lever is changed, or the key is
turned on while the accelerator is depressed.

Diagnostic Mode Feature

Diagnostic mode eases troubleshooting.
In the unlikely event of certain electrical system failures,
the controller will default to a mode that will permit the
vehicle to operate, but at a very reduced speed.
This feature allows the vehicle to be driven back to its
storage facility where the problem can be diagnosed.
The controller can be put in diagnostic mode by the
technician and the controller will report the failure mode.
The two-position 'Run-Tow/Maintenance' switch is
located under the passenger seat (Ref Fig. 2).
Switch
Fig. 2 Run-Tow/Maintenance Switch

OPERATION

With the switch in 'TOW/MAINTENANCE' position:
• the controller is deactivated
• the electronic braking system is deactivated
which allows the vehicle to be towed or roll freely
• the reverse warning beeper is deactivated
With the switch in 'RUN' position:
Page F-2
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48 volt vehicles operate only in the 'RUN' position.
If all of the following events occur with the switch in 'RUN' posi-
tion
a) the vehicle has been stopped for more than one
b) the accelerator pedal has been released for more
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. Any unusual situation
sensed by the 48 volt system will cause a similar
response. The system functions in all key switch posi-
tions.
To prevent the possibility of loss of control that
could cause severe injury or death, use service
brake to control speed. The controller system
is not a substitute for the service brake.
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
the electronic braking will limit the speed of the vehicle
to the designed speed range (the warning beeper will
not sound). When the electronic braking system is acti-
vated by this sequence of events, the motor generates
power which is returned to the batteries. 48 volt 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 retard the speed of the vehicle through
regenerative braking.
Repair and Service Manual
the controller is activated
the electronic braking system and reverse warn-
ing beeper features are activated
NOTICE
second
than one second
with the accelerator pedal depressed or released
(except options equipped with compression brak-
ing)