2017-2022 Prius Prime Owner's Manual

The heat in the Prius Prime operates using different systems based on the driving mode and outside temperature. Here is a breakdown: 1. **Heating in HV Mode**: - When the vehicle is in Hybrid Vehicle (HV) mode, the gasoline engine operates to extract heat from the engine coolant via the heater. 2. **Heating in EV Mode**: - In Electric Vehicle (EV) mode, heating is done by a heat pump system. However, in low outside temperatures or snowy conditions, heating may be less effective, and warm air may not come out. 3. **Impact of Low Temperatures**: - When the outside temperature is approximately 14°F (-10°C) or lower, the gasoline engine may operate in order to extract heat from the engine coolant via the heater even in EV mode. 4. **Frost and Heating Performance**: - If frost forms on the outside heat exchanger, the heating performance will decline. The frost can be removed by operating the Remote Air Conditioning System before driving. 5. **Automatic Mode**: - Fan speed is adjusted automatically according to the temperature setting and the ambient conditions. The fan may stop for a while until warm or cool air is ready to flow. 6. **Water Droplets During Air Conditioning Operation**: - Water droplets may fall from the vehicle during or after air conditioning operation due to condensation or frost forming on the outside heat exchanger, accumulator, and air conditioning piping. 7. **Heated Steering Wheel and Seat Heaters**: - The Prius Prime also features heated steering wheel and seat heaters, which can be turned on when the power switch is in ON mode. 8. **Safety Precautions**: - There are important safety precautions to prevent burns related to the use of the seat heaters and heated steering wheel. Additionally, it's important to note that in the event of overheating, the high coolant temperature warning light may come on, and specific procedures need to be followed to address this issue, as outlined in the manual. In summary, the heat in the Prius Prime is generated using a combination of the gasoline engine, heat pump system, and automatic temperature controls to optimize heating performance based on the driving mode and outside temperature.

The Lane Departure Alert (LDA) system warns the driver when the vehicle might depart from its lane and provides assistance by operating the steering wheel to keep the vehicle in its lane if certain conditions are met. The Dynamic Radar Cruise Control with Full-Speed Range automatically adjusts the vehicle's speed to match that of the preceding vehicle in vehicle-to-vehicle distance control mode or maintains a fixed speed in constant speed control mode. However, it is important for the driver to remain vigilant and not solely rely on the system, especially in certain driving conditions.

The Simple Advanced Parking Guidance System provides steering wheel operation assistance to guide the vehicle toward a selected intended parking spot. The system operates when backing into a parking spot and when departing from a parallel parking spot, providing guidance but not automatic parking. It detects obstacles and utilizes the Parking Support Brake function to stop the vehicle if a potential collision is detected. The system prioritizes safety and warns the driver if the parking space is not suitable or if obstacles are present. It should be used cautiously and the driver should always verify the safety of the surrounding area.

Yes, it is possible to set the 2017 Prius Prime Premium to only draw 8 amps instead of 12 amps while on Level 1 charging. You can change the upper limit of the charging current by accessing the "Vehicle Settings" on the multi-information display. First, press the meter control switches to select "Vehicle Settings," then select "Charge Settings," and finally choose "Charge Current." From there, you can select "8A" as the maximum charging current during charging, thus restricting it to 8 amps. This change can be made through the menu as described in the owner's manual.