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automatically disengage when the
brake pedal is released or brake pedal pressure is quickly decreased.
Hill Start Assist (HSA)
Hill Start Assist (HSA) may
automatically activate when the vehicle is stopped on a hill and
Automatic Vehicle Hold (AVH) is not enabled. This feature is designed to
prevent the vehicle from rolling, either forward or rearward, during vehicle
drive off. During the transition from releasing the brake pedal to
accelerating to drive off on a hill, HSA holds the braking pressure to prevent rolling. HSA will not activate if the
vehicle is in a drive gear and facing downhill or if the vehicle is facing
uphill and in R (Reverse).
Automatic Vehicle Hold (AVH)
Automatic Vehicle Hold (AVH),
if equipped, can be turned on by
pressing AUTO HOLD with the driver seat belt fastened, the driver door
closed, and the engine running. The AVH indicator will come on.
This feature will activate when the
vehicle is stopped to prevent it from moving. After the brake pedal has
been released and before the
accelerator pedal has been pressed,
AVH uses braking pressure to hold the vehicle stationary. In addition, the
ABS pump motor may activate to
build brake pressure to maintain the vehicle at a standstill if necessary.
If AVH is holding the vehicle, the AVH indicator will change to green. Once
AVH is active it will hold the vehicle
for a defined time period then engage the parking brake. While AVH is
holding the vehicle, the parking brake will engage if the driver door is
opened or the driver seat belt is
unfastened. See Automatic Vehicle Hold (AVH) Light 0 145.
Regenerative Braking (PLUG-IN Only)
Regenerative braking takes some of the energy from the moving vehicle and turns it back into electrical
energy. This energy is then stored back into the high voltage battery system, contributing to increased energy efficiency.
The hydraulic disc brakes work with the regenerative braking to ensure
effective braking, such as when a high braking demand is requested.
236 DRIVING AND OPERATING
The braking system is computer
controlled and blends the regenerative braking with the conventional
hydraulic disc brakes to meet any requirements for deceleration. The controller interprets the braking
request and uses regenerative braking, conventional hydraulic braking, or a
combination of both as necessary.
Because the hydraulic braking system uses an electronic booster for boost
assist on demand, under certain conditions a motor noise may be heard. This is normal operation.
See Warning Lights, Gauges, and
Indicators 0 126 and Driver Information Center (DIC) 0 160. In the event of a
controller problem, the brake pedal may be harder to push and the
stopping distance may be longer.
Regen on Demand
Regen on Demand allows the user to select increased coast deceleration by pressing the steering wheel tap
controls. It is activated temporarily while in D (Drive) and permanently
while in M (Manual Mode). Increased coast deceleration will be felt while
the accelerator pedal is fully released and lessened when the accelerator
pedal is pressed.
The brake pedal must be applied at
low speed, because Regen on Demand will not stop the car.
The brake lamps may come on when this feature is activated.
To enter Permanent Regen on Demand Mode:
1. Move the shift lever from
D (Drive) to M (Manual Mode). While in Permanent Regen on Demand, the M of the PRNDM
section of the instrument cluster will become highlighted, and the current coast deceleration level is indicated. Level 1 (M1) provides
the most coast deceleration.
Level 4 (M4) provides the least coast deceleration and is
equivalent to the level found in D (Drive).
2. Tap the left control on the back of the steering wheel toward the driver to select more coast
deceleration. Tap the right
control toward the driver to
select less coast deceleration. To select the most coast
deceleration, press and hold the left control.
3. To exit, move the shift lever back to D (Drive).
With the shift lever in D (Drive) and not in Permanent Regen on Demand Mode, the Tap Shift controls will
activate Temporary Regen on
Demand. The vehicle exits Temporary Regen on Demand after the
