2012 Toyota Prius Hybrid System

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Information on the 2012 Toyota Prius Hybrid System.
For more information please visit www.jerrystoyota.com.

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2012 Toyota Prius Hybrid System

  1. 1. 1-1. Hybrid systemHybrid system features Your vehicle is a hybrid vehicle. It has characteristics different from conventional vehicles. Be sure you are closely familiar with the char- acteristics of your vehicle, and operate with care. The hybrid system combines the use of a gasoline engine and an electric motor (traction motor) according to driving conditions, improving fuel efficiency and reducing exhaust emissions. Gasoline engine Electric motor (traction motor)30
  2. 2. 1-1. Hybrid system■ When stopped/during start off The gasoline engine stops* when the vehicle is stopped. During start off, the electric motor (traction motor) drives the vehicle. At slow speeds or when traveling down a gentle slope, the engine 1 is stopped* and the electric motor (traction motor) is used. Before driving When shift position is in N, the hybrid battery (traction battery) will not be charged. Thus, shift to P when the vehicle is stopped. In addition, when driving in heavy traffic, use D or B. *: However, when the hybrid battery (traction battery) need to be charged or while the engine is being warmed up, the gasoline engine may not stop automatically. (→P. 33)■ During normal driving The gasoline engine is predominantly used. The electric motor (traction motor) charges the hybrid battery (traction battery) as necessary.■ When accelerating sharply When the accelerator pedal is depressed heavily, the power of the hybrid battery (traction battery) is added to that of the gaso- line engine via the electric motor (traction motor).■ When braking (regenerative braking) The electric motor (traction motor) charges the hybrid battery (traction battery). 31
  3. 3. 1-1. Hybrid system Vehicle proximity notification system When driving with the gasoline engine stopped, a sound, which changes in accordance with the driving speed, will be played in order to warn people nearby of the vehicle’s approach. The sound will stop when the vehicle speed exceeds approximately 15 mph (25 km/h).■ Regenerative braking In the following situations, kinetic energy is converted to electric energy and deceleration force can be obtained in conjunction with the recharging of the hybrid battery (traction battery). ● The accelerator pedal is released while driving with the shift position in D or B. ● The brake pedal is depressed while driving with the shift position in D or B.■ Hybrid System Indicator Hybrid System Indicator represents the hybrid system power output and regener- ative charging. (→P. 225)32
  4. 4. 1-1. Hybrid system■ Conditions in which the gasoline engine may not stop The gasoline engine starts and stops automatically. However, it may not stop automatically in the following conditions*: ● During gasoline engine warm-up 1 ● When the temperature of the hybrid battery (traction battery) is high or low Before driving ● During hybrid battery (traction battery) charging ● When the heater is switched on *: Depending on the circumstances, the gasoline engine may also not stop automatically in situations other than those above.■ Charging the hybrid battery (traction battery) ● As the gasoline engine charges the hybrid battery (traction battery), the battery does not need to be charged from an outside source. However, if the vehicle is left parked for a long time the hybrid battery (traction bat- tery) will slowly discharge. For this reason, be sure to drive the vehicle at least once every few months for at least 30 minutes or 10 miles (16 km). If the hybrid battery (traction battery) becomes fully discharged and you are unable to jump-start the vehicle with the 12-volt battery, contact your Toyota dealer. ● If the shift position is in N, the hybrid battery (traction battery) will not be charged. Always shift the shift position in P when the vehicle is stopped. When driving in heavy traffic, operate the vehicle with the shift position in D or B to avoid discharging the hybrid battery (traction battery).■ Charging the 12-volt battery →P. 546■ After the 12-volt battery has discharged or has been changed or removed The gasoline engine may not stop even if the vehicle is running on the hybrid battery (traction battery). If this continues for a few days, contact your Toyota dealer. 33
  5. 5. 1-1. Hybrid system■ Sounds and vibrations specific to a hybrid vehicle There may be no engine sounds or vibration even though the vehicle is able to move. For safety, apply the parking brake and make sure to shift the shift position to P when parked. The following sounds or vibrations may occur when the hybrid system is operating and are not a malfunction: ● The brake system operation sound heard from the front of the vehicle when the driver’s door is opened. ● Motor sounds may be heard from the engine compartment. ● Sounds may be heard from the hybrid battery (traction battery) when the hybrid system starts or stops. ● Sounds may be heard from the transmission when the gasoline engine starts or stops, when driving at low speeds, or during idling. ● Engine sounds may be heard when accelerating sharply. ● Sounds may be heard due to regenerative braking when the brake pedal is depressed and accelerator is loosened. ● Other sounds, such as motors and mechanical noises, may be heard from the brake system when the brake pedal is depressed. ● Vibration may be felt when the gasoline engine starts or stops. ● Cooling fan sounds may be heard from the air intake vent. (→P. 37) ● The operation sound of the air conditioning system (air conditioning com- pressor, blower motor).34
  6. 6. 1-1. Hybrid system■ Vehicle proximity notification system In the following cases, the vehicle proximity notification system may be diffi- cult for surrounding people to hear. ● In very noisy areas 1 ● In the wind or the rain Also, as the vehicle proximity notification system is installed on the front of Before driving the vehicle, it may be more difficult to hear from the rear of the vehicle com- pared to the front.■ Maintenance, repair, recycling, and disposal Contact your Toyota dealer regarding maintenance, repair, recycling and dis- posal. Do not dispose of the vehicle yourself. 35
  7. 7. 1-1. Hybrid systemHybrid system precautions Take care when handling the hybrid system, as it contains a high voltage system (about 650V at maximum) as well as parts that become extremely hot when the hybrid system is operating. Obey the caution labels attached to the vehicle. Air conditioning compressor Service plug High voltage cables (orange) Electric motor (traction Power control unit and DC/ motor) DC converter Hybrid battery (traction bat- Caution label tery)36
  8. 8. 1-1. Hybrid systemHybrid battery (traction battery) air vent There is an air intake vent on the right side of the rear seatback for 1 the purpose of cooling the hybrid battery (traction battery). If the Before driving vent becomes blocked, the hybrid battery (traction battery) may overheat, leading to a reduction in hybrid battery (trac- tion battery) output.Emergency shut off systemWhen a certain level of impact is detected by the impact sensor, theemergency shut off system blocks off the high voltage current andstops the fuel pump to minimize the risk of electrocution and fuelleakage. If the emergency shut off system activates, your vehicle willnot restart. To restart the hybrid system, contact your Toyota dealer.Hybrid warning messageA message is automatically displayed when a malfunction occurs inthe hybrid system or an improper operation is attempted. If a warning message is shown on the multi-information display, read the message and follow the instructions. (→P. 507) 37
  9. 9. 1-1. Hybrid system■ If a warning light comes on, a warning message is displayed or the 12- volt battery is disconnected The hybrid system may not start. In that case, try to start the system again. If the “READY” indicator does not come on, contact your Toyota dealer.■ Running out of fuel When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the vehicle with at least enough gasoline to make the low fuel level warning light (→P. 498) go off. If there is only a small amount of fuel, the hybrid system may not be able to start. (The minimum amount of fuel to add to make the low fuel level warning light go out is about 1.9 gal. [7.1 L, 1.6 Imp.gal.], when the vehicle is on a level surface. This value may vary when the vehicle is on a slope.)■ Electromagnetic waves ● High voltage parts and cables on the hybrid vehicles incorporate electro- magnetic shielding, and therefore emit approximately the same amount of electromagnetic waves as conventional gasoline powered vehicles or home electronic appliances. ● Your vehicle may cause sound interference in some third party-produced radio parts.■ Hybrid battery (traction battery) The hybrid battery (traction battery) has a limited service life. The lifespan of the hybrid battery (traction battery) can change in accordance with driving style and driving conditions.38
  10. 10. 1-1. Hybrid system CAUTION■ High voltage precautions The vehicle has high voltage DC and AC systems as well as a 12-volt sys- tem. DC and AC high voltage is very dangerous and can cause severe burns 1 and electric shock that may result in death or serious injury. ● Never touch, disassemble, remove or replace the high voltage parts, Before driving cables or their connectors. ● The hybrid system will become hot after starting as the system uses high voltage. Be careful of both the high voltage and the high temperature, and always obey the caution labels attached to the vehicle. ● Never try to open the service plug access hole located in the luggage compartment. The service plug is used only when the vehicle is serviced and is subject to high voltage. 39
  11. 11. 1-1. Hybrid system CAUTION■ Road accident cautions If your vehicle is involved in an accident, observe the following precautions to reduce the risk of death or serious injury: ● Stop the vehicle in a safe place to prevent subsequent accidents. While depressing the brake pedal, apply the parking brake, shift the shift position to P and turn the hybrid system off. Then, slowly release the brake pedal. ● Do not touch the high voltage parts, cables and connectors. ● If electric wires are exposed inside or outside your vehicle, an electric shock may occur. Never touch exposed electric wires. ● If a fluid leak occurs, do not touch the fluid as it may be strong alkaline electrolyte from the hybrid battery (traction battery). If it comes into contact with your skin or eyes, wash it off immediately with a large amount of water or, if possible, boric acid solution. Seek immediate medical attention. ● If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible. Never use a fire extinguisher that is not meant for electric fires. Using even a small amount of water may be dangerous. ● If your vehicle needs to be towed, do so with front wheels raised. If the wheels connected to the electric motor (traction motor) are on the ground when towing, the motor may continue to generate electricity. This may cause an electricity leakage leading to a fire. (→P. 485) ● Carefully inspect the ground under the vehicle. If you find that liquid has leaked onto the ground, the fuel system may have been damaged. Leave the vehicle as soon as possible.■ Hybrid battery (traction battery) Your vehicle contains a sealed nickel-metal hydride battery. If disposed of improperly, it is hazardous to the environment and there is a risk of severe burns and electrical shock that may result in death or serious injury.40
  12. 12. 1-1. Hybrid system NOTICE■ Hybrid battery (traction battery) air vent ● Do not put foreign objects near the air vent. The hybrid battery (traction battery) may overheat and be damaged. 1 ● Clean the air vent regularly to prevent the hybrid battery (traction battery) from overheating. Before driving ● Do not wet or allow foreign substances to enter the air vent as this may cause a short circuit and damage the hybrid battery (traction battery). ● Do not carry large amounts of water such as water cooler bottles in the vehicle. If water spills onto the hybrid battery (traction battery), the battery may be damaged. Have the vehicle inspected by your Toyota dealer. ● If the rear seat belt becomes separated from the guide (→P. 103), it could obstruct the hybrid battery (traction battery) air vent. Set the rear seat belt into the guide to use. 41
  13. 13. 1-1. Hybrid systemEnergy monitor/consumption screen You can view the status of your hybrid system on the Display Audio system screen, the navigation system screen or the multi-informa- tion display. Display Audio system screen or navigation system screen Multi-information display Energy monitor Displays the flow of energy as it changes in accordance with driving conditions. Display Audio system Press “CAR”. If the “Consumption” screen is displayed, touch “Energy”.42
  14. 14. 1-1. Hybrid system Condition DisplayWhen the vehicle is powered by 1the electric motor (tractionmotor) Before drivingWhen the vehicle is powered byboth the gasoline engine and theelectric motor (traction motor)When the vehicle is powered bythe gasoline engine 43
  15. 15. 1-1. Hybrid system Condition Display When the vehicle is charging the hybrid battery (traction battery) When there is no energy flow Low Full Hybrid battery (traction battery) statusThese images are examples only, and may vary slightly from actual conditions.44
  16. 16. 1-1. Hybrid systemNavigation systemSTEP 1 Press “INFO APPS” or “INFO”. 1 Before drivingSTEP 2 Touch “Fuel Consumption” on the “Information” screen. If the “Consumption” screen is displayed, touch “Energy”. 45
  17. 17. 1-1. Hybrid system Condition Display When the vehicle is powered by the electric motor (traction motor) When the vehicle is powered by both the gasoline engine and the electric motor (traction motor) When the vehicle is powered by the gasoline engine46
  18. 18. 1-1. Hybrid system Condition Display 1 Before driving When the vehicle is charging the hybrid battery (traction battery) When there is no energy flow Low Full Hybrid battery (traction battery) statusThese images are examples only, and may vary slightly from actual conditions. 47
  19. 19. 1-1. Hybrid system Multi-information display Press the “DISP” button to dis- play the energy monitor. ■ Names and meaning of each icons Gasoline engine Hybrid battery (traction bat- tery) Electric motor (traction motor) Condition Display When the vehicle is powered by the electric motor (traction motor) When the vehicle is powered by both the gasoline engine and the electric motor (traction motor)48
  20. 20. 1-1. Hybrid system Condition Display When the vehicle is powered by the gasoline engine 1 Before driving When the vehicle is charging the hybrid battery (traction battery) When there is no energy flow Low Full Hybrid battery (traction battery) statusThese images are examples only, and may vary slightly from actual conditions. 49
  21. 21. 1-1. Hybrid system Consumption screen Display Audio system Press “CAR”. If the “Energy Monitor” screen is displayed, touch “Consumption”. Fuel consumption in the past 30 minutes Cruising range (→P. 55) Regenerated energy in the past 30 minutes One symbol indicates 30 Wh. Up to 4 symbols are shown. The image is example only, and may vary slightly from actual conditions. Navigation system STEP 1 Press “INFO APPS” or “INFO”. STEP 2 Touch “Fuel Consumption” on the “Information” screen. If the “Energy Monitor” screen is displayed, touch “Consumption”. Fuel consumption in the past 30 minutes Regenerated energy in the past 30 minutes One symbol indicates 30 Wh. Up to 4 symbols are shown. Cruising range (→P. 55) The image is example only, and may vary slightly from actual conditions.50
  22. 22. 1-1. Hybrid systemMulti-information display Press the “DISP” button to dis- play the 5-minute or 1-minute fuel consumption display. 1 Press and hold the “DISP” button to switch between 5-minute and Before driving 1-minute fuel consumption dis- plays. The display will alternate with each press of the button. 5-minute interval fuel consumption Fuel consumption Displays the average fuel con- sumption for the last 30 minutes in intervals of 5 minutes or the last 15 minutes in intervals of 1 minute. Regenerated energy Displays the amount of energy generated over the last 30 min- 1-minute interval fuel utes in intervals of 5 minutes or consumption the last 15 minutes in intervals of 1 minute. One symbol indicates 50 Wh (5- minute interval display) or 30 Wh (1-minute interval display). Up to 8 symbols are shown. 51
  23. 23. 1-1. Hybrid system EV indicator*1 Eco Driving Indicator Light*1 Average speed*2 Average fuel consumption/eco savings*2 Use the displayed average fuel consumption as a reference. *1: →P. 225 *2:The current amount since the trip meter was reset will be displayed. These functions can be reset by pressing and holding the “TRIP” button when either the 5-minute or 1-minute interval fuel con- sumption display is being shown. The display can be switched between average fuel consump- tion/average speed and eco sav- ings. (→P. 232)52
  24. 24. 1-1. Hybrid systemMonthly fuel consumption record/Eco savings record (multi-information display only) Press the “DISP” button to dis- 1 play the monthly fuel consump- tion record or eco savings Before driving record. Press and hold the “DISP” button to switch the display between monthly fuel consumption record and eco savings record. The display will alternate with each press of the button. Monthly fuel consumption record display Displays the average fuel consumption for the previous 6 months. Average fuel consumption for the previous 6 months EV indicator* Eco Driving Indicator Light* Driving distance for each month *: →P. 225 53
  25. 25. 1-1. Hybrid system Eco savings record display By setting the comparison consumption and the gasoline value beforehand (→P. 231), the difference is calculated when the actual consumption is less than the comparison consumption, and the amount of money saved is displayed*1. If the comparison consumption is set to 0, the consumption cost is displayed*1. *1: The displayed amount is intended only as a guide and may differ from the actual amount. Savings or consumption costs for the previous 6 months EV indicator*2 Eco Driving Indicator Light*2 Driving distance for each month *2: →P. 225■ Remaining hybrid battery (traction battery) charge display The charge amount of the hybrid battery (traction battery) is automatically controlled by the hybrid system. For this reason, even if electricity is recov- ered via the regenerative braking, or electricity is generated via the gasoline engine, the displayed hybrid battery (traction battery) charge amount may not reach the highest level (level 8). However, this does not indicate a mal- function.54
  26. 26. 1-1. Hybrid system■ Resetting the consumption data Display Audio system Selecting “Clear” on the “Consumption” screen will reset the fuel consump- tion and the regenerated energy for the past 30 minutes. Selecting “Yes” on the following screen will confirm resetting of all the data. 1 Navigation system Selecting “Clear” on the “Consumption” screen will reset the fuel consump- Before driving tion and the regenerated energy for the past 30 minutes. Selecting “Yes” on the following screen will confirm resetting of all the data. Multi-information display If the “POWER” switch is turned OFF, average fuel consumption and regen- erated energy data will be reset.■ Resetting the monthly fuel consumption/eco savings record Press and hold the “TRIP” button while the monthly fuel consumption/eco savings record is displayed. A confirmation message will be displayed. Press and hold the “TRIP” button to reset the data. Press the “DISP” button to cancel the reset operation. The screen will return to the previous display if no buttons are pressed for approximately 10 sec- onds.■ Cruising range Displays the estimated maximum distance that can be driven with the quan- tity of fuel remaining. This distance is computed based on your average fuel consumption. As a result, the actual distance that can be driven may differ from that dis- played.■ Odometer/trip meter/distance to empty The odometer/trip meter/distance to empty will not be displayed while the monthly fuel consumption record or the eco savings record is being dis- played. 55
  27. 27. 1-1. Hybrid systemHybrid vehicle driving tips For economical and ecological driving, pay attention to the following points: ■ Using Eco drive mode When using Eco drive mode, the torque corresponding to the accelerator pedal depression amount can be generated more smoothly than it is in normal conditions. In addition, the opera- tion of the air conditioning system (heating/cooling) will be mini- mized, improving the fuel economy. (→P. 204) ■ Use of Hybrid System Indicator Eco-friendly driving is possible by keeping the indicate of Hybrid System Indicator within Eco area. (→P. 225) ■ When braking the vehicle Make sure to operate the brakes gently and in good time. A greater amount of electrical energy can be retained when slow- ing down. ■ Delays Repeated acceleration and deceleration, as well as long waits at traffic lights, will lead to bad fuel consumption. Check traffic reports before leaving and avoid delays as much as possible. When encountering a delay, gently release the brake pedal to allow the vehicle to move forward slightly while avoiding overuse of the accelerator pedal. Doing so can help control excessive gasoline consumption. ■ Highway driving Control your speed and keep at a constant speed. Also, before stopping at a toll booth or similar, allow plenty of time to release the accelerator and gently apply the brakes. A greater amount of electrical energy can be retained when slowing down.56
  28. 28. 1-1. Hybrid system■ Air conditioning on/off Switch the air conditioning ( ) to off when it is not needed. Doing so can help control excessive gasoline consumption. 1 In summer: In high temperatures, use the recirculated air mode. Doing so will help to reduce the burden on the air conditioner Before driving and reduce fuel consumption as well. In winter: Because the gasoline engine will not automatically cut out until the gasoline engine and the interior of the vehicle are warm, it will consume fuel. Also, fuel consumption can be improved by avoiding overuse of the heater.■ Checking tire inflation pressure Make sure to check the tire inflation pressure frequently. Improper tire inflation pressure can cause poor fuel consump- tion. Also, as snow tires can cause large amounts of friction, their use on dry roads can lead to poor fuel consumption. Use a tire that is appropriate for the season.■ Luggage Carrying heavy luggage can lead to poor fuel consumption. Avoid carrying unnecessary luggage. Installing a large roof rack can also cause poor fuel consumption.■ Warming up before driving Since the gasoline engine starts up and cuts out automatically when cold, warming up the engine is unnecessary. Moreover, frequently driving short distances will cause the engine to repeatedly warm up, which can lead to poor fuel consumption. 57

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