2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 11-1
11
SECTION 11 – ELECTRICAL SYSTEM AND
TESTING
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DANGER
• See General Warning, Section 10, Page 10-1.
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WARNING
• See General Warning, Section 10, Page 10-1.
GENERAL INFORMATION
The IQ System vehicle uses a 48-volt electrical system that is powered by deep-cycle lead-acid batteries and
includes an onboard computer. The IQ System vehicle uses a shunt-wound 3.2 hp motor and includes several
additional features.
• Shunt-Wound Motor:
The shunt-wound motor, unlike a series motor, is designed so that the speed
controller is able to vary the amount of current passing through the field coils independently from the
current passing through the armature.
• Motor Braking:
Under certain conditions a shunt-wound motor also has the ability to act as an electri-
cal brake to slow the vehicle. There are three features of the IQ electrical system which will activate the
motor braking function: Walk Away Braking, Pedal Down Motor Braking, and Pedal Up Motor Braking
(adjustable with the IQDM-P handset).
• Walk away braking:
the walk away braking function will prevent the vehicle from rolling at more than 1
or 3 mph (1.5 or 4.8 km/h) unless the accelerator is pressed. This prevents the possibility of a parked
vehicle (with the park brake disengaged) rolling away too fast to be overtaken on foot. If the walk away
braking function remains engaged for two seconds or more, a warning buzzer will sound to alert the
driver that motor braking has been activated.
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WARNING
• Walk away braking will not limit vehicle speed to 1 mph (1.6 km/h) on very steep grades. Do
not operate vehicle on slopes exceeding 20% grades.
• Pedal Down Motor Braking:
This feature helps to control vehicle downhill speed. Motor braking is
activated when the vehicle reaches the programmed top speed and holds the vehicle at that speed.
Motor braking is automatically disengaged when vehicle speed slows below the programmed top
speed.
• Pedal Up Motor Braking (adjustable):
When vehicle speed is above 11 mph (17.7 km/h), releasing
the accelerator pedal will activate motor braking, which slows the vehicle speed. Once vehicle speed
slows to below approximately 11 mph (17.7 km/h), with the accelerator pedal still released, motor brak-
ing will be deactivated and the vehicle will coast freely. This feature is adjustable. Contact your Club
Car dealer/distributor to inquire about this adjustable feature.
• Regenerative Braking
: When motor braking is activated, the vehicle motor acts as a generator, slow-
ing the vehicle as it creates energy that is used to charge the batteries.
(continued on page 11-10)
