Club Car 1996 DS Golf Car Gasoline, Service Manual

Page: 395 / 544

Page 21-3
E
21A
General Information, Continued:
• “Zero Speed Detect”: This prevents the vehicle from rolling away uncontrolled should a driver park on
a slope and leave the vehicle without locking the park brake. When the vehicle is in use with the key
switch ON, the zero speed detect function will resist vehicle rolling.
• “Pedal Down” Motor Braking: This feature helps to control downhill speeds. When vehicle speed
exceeds approximately 15 mph with the accelerator depressed, an electronic sensor automatically
engages motor braking (the motor generates current) which holds top speed to approximately 15 mph.
Braking is automatically disengaged when the speed slows below approximately 15 mph. While
descending hills, motor braking force regulates maximum speed to approximately 15 mph.
• “Pedal Up” Motor Braking: When vehicle speed is above 12 mph, releasing the accelerator pedal will
activate motor braking and cause the motor to generate current and slow the vehicle to approximately 9
mph, no matter what the terrain. Once vehicle speed slows to below approximately 9 mph with the
accelerator pedal still released, motor braking will be deactivated.
Zero Speed Detect, Pedal Down Motor Braking, and Pedal Up Motor Braking can be either Regenerative
Braking or Dynamic Braking.
Regenerative Braking: When driving downhill, the vehicle motor acts as a generator, slowing the vehicle as
it creates energy that is used to replenish the batteries when the on-board computer senses that the batter-
ies are in a state of charge that can accept the extra energy.
Dynamic Braking: If the batteries are already at or near full charge and cannot accept a charge, the energy
created as the motor slows the vehicle is harmlessly disposed of through the energy displacement module.
The Forward and Reverse Switch on the PowerDrive Plus vehicle is a “rocker” type (Figure 21-3), and is
located in the same place as on all other DS vehicles. The Forward (F) and Reverse (R) positions are clearly
marked on the switch. Push down the F (forward) side of the switch to run the vehicle in the forward direction,
or push down the R (reverse) side of the switch to run the vehicle in reverse. When the switch is positioned
with neither side down, the vehicle is in the neutral position and the vehicle will not run if the accelerator is
depressed.
To properly service and maintain this vehicle, it is necessary to understand the electrical circuitry and the
functions of all components in the system. There are three circuits that are in operation on the vehicle: 1) the
control circuit, 2) the power circuit, 3) and the charge circuit. See NOTE at the top of Page 21-5.
FIGURE 21-2 FIGURE 21-3
POS.
NEG.
POS. NEG. POS. NEG.
POS.
NEG.
POS.
NEG.
POS.
NEG.
#1
#2 #5
#6
#4
#3
FRONT OF CAR
DS POWERDRIVE SYSTEM 48 AND
POWERDRIVE PLUS WITH REGENERATIVE BRAKING
DISCONNECT HERE
R
F