Modes of Operation

Traditional EV Driving 

The electric drive system delivers torque to the wheels to mimic a normal automatic transmission vehicle. This includes application of creep torque at low vehicle speeds with no accelerator pedal input and application of light negative torque (braking torque) at higher vehicle speeds when accelerator pedal is released. The maximum creep speed in forward or reverse direction is about 6 km/h (4mph).

Maximum vehicle performance is highly dependent on the state of the high voltage battery including State of Charge, Temperature, Age, and recent usage of the battery. Prolonged heavy usage of the electric drive system (either discharging or charging) will lead to limited performance operation.

When the High Voltage Battery's State of Charge becomes very low the vehicle will gradually reduce power down to a predetermined limit for the last few miles of operation after which the vehicle's propulsion will cease entirely (similar to running out of gas in a conventional vehicle). There will be a series of warnings presented in the instrument cluster to alert the driver to this condition. If the battery is completely depleted, it must be charged to a predetermined limit before the vehicle will resume operation.

One Pedal Drive 

One Pedal Drive (OPD) gives the customer greater ability to control the vehicle speed with the accelerator pedal. The customer can enable or disable the mode by using the OPD toggle in the drive mode section of the Sync screen.

Driver assist features, such as cruise control, may temporarily suspend OPD. When enabled, the cluster telltale will illuminate. Lift-pedal braking is increased, and the vehicle will be controlled to a complete stop on flat ground and low grades when the customer completely lifts their foot from the accelerator pedal. The vehicle may not necessarily reach a stop on high road grades or heavy payloads, and the brake pedal may still need to be used to bring the vehicle to a stop.

The OPD system is managed by multiple control modules. If any of the supporting modules cannot support OPD, One Pedal Drive will be suspended and a DTC will be stored in one of the modules.