How much do you know about hybrid car cooling systems?

Study Notes

The ICE cooling system maintains a narrow temperature range for optimal efficiency and performance.
The system also provides heat to the passenger compartment through the heater core.
The water pump is the heart of the cooling system and is driven by the ICE accessory drive belt.
A thermostat is used to regulate coolant flow to the ICE water jacket and heater core until the coolant reaches approximately 195°F.
The electric fan and thermostat work together to stabilize coolant temperature.
Hybrid electric vehicles often use an electric water pump for increased efficiency and reduced emissions.
An auxiliary water pump may be used to circulate coolant to the heater core in some vehicles.
A failed auxiliary water pump may result in reduced heater performance or disable the hybrid drive system.
Diagnostic steps for a failed auxiliary water pump include verifying the customer concern, inspecting the engine cooling system, checking for codes with a scan tool, and consulting service information.
The heating system's temperature can be adjusted by changing the position of the blend door and the percentage of air that is sent through the heater core.
Coolant heat storage system used in Toyota Prius to limit emissions and improve drivability during cold starts.
Coolant heat storage tank built with inner and outer casing, vacuum formed between them to prevent heat transfer.
Approximately 3 quarts of coolant stored inside inner casing, can be kept warm for up to three days.
Water valve used to direct coolant flow between storage tank, ICE, and heater core.
Water valve controlled by ECM and consists of electric motor, drive gears, rotary valve, and valve position sensor.
Storage tank pump used to move coolant through heat storage tank when ICE is shut off.
PTC heaters built into heater core and footwell air ducts used to boost heat to passenger compartment.
PTC heaters convert electrical energy into heat.
A/C electronic control unit turns on PTC heaters when coolant temperature is low and MAX HOT is requested.
PTC heaters sometimes referred to as "glow plugs" in service information.

Description

Test your knowledge of hybrid vehicle cooling and heating systems with this informative quiz! From the ICE cooling system and water pump to auxiliary pumps and PTC heaters, this quiz covers all the basics of how these systems work to keep you comfortable while driving. Challenge yourself with questions about system components, diagnostic steps for identifying issues, and more. Whether you're a mechanic or a hybrid vehicle enthusiast, this quiz is sure to expand your knowledge of these innovative systems.