Overall Main Components [Electric Power Path] : AC : DC Manager Overall Main Components [Electric Power Path] : AC : DC Hybrid Vehicle Transaxle Assembly Engine Power Split Planetary Gear Unit MG1 HV Battery MG2 Motor Speed Reduction Planetary Gear Unit Inverter with Converter Assembly New Model Prius 2009

Overall Gear Train 2 planetary gear units MG2 MG1 Engine Counter Gear Manager Overall Gear Train 2 planetary gear units MG1 MG2 Engine To Front Wheel Counter Gear Engine: Planetary Carrier (Power Split Planetary Gear Unit) MG1: Sun Gear (Power Split Planetary Gear Unit) MG2: Sun Gear (Motor Speed Reduction Planetary Gear Unit) New Model Prius 2009

Overall Major Difference from previous model Item Contents MG1 / MG2 Manager Overall Major Difference from previous model Item Contents MG1 / MG2 Weight reduction Max. output is increased Max. system voltage is increased Inverter Volume reduction Boost voltage is increased (Max. 650 V) Maintenance interval of SLLC is changed A/C inverter is separated HV Control Various driving mode is adopted - EV drive mode - ECO drive mode - PWR mode New Model Prius 2009

Components Layout of Main Components 2ZR-FXE Engine HV Battery Unit Manager Components Layout of Main Components HV Battery Unit Battery Module (DC 201.6 V) Junction Block Battery Smart Unit Auxiliary Battery (Sealed Type) 2ZR-FXE Engine Cooler Compressor with Motor Assembly Power Cable Insulation and Isolation of High-voltage Both positive and negative terminals of every high-voltage circuit are insulated from body ground. An orange colored cover is used for all high-voltage cables so that customers and technicians can easily distinguish high-voltage cables. A case or cover is provided for each of the high-voltage units (HV battery, Inverter with Converter Assembly, Hybrid Transaxle, etc.) and high-voltage cables. Power Management Control ECU (HV CPU) ECM Inverter with Converter Assembly Boost Converter • Inverter MG ECU DC/DC Converter for Auxiliary Battery P410 Hybrid Transaxle MG1 • MG2 New Model Prius 2009

MG (Motor Generator) MG1 and MG2 Features Manager MG (Motor Generator) MG1 and MG2 Features Total weight is reduced (Approx. 33%) and Max. motor output (MG2) is increased (from 50 kW to 60 kW) MG1 MG2 Previous Model New PRIUS More compact, more light weight design achieved through centralized winding of the coils. Motor rotational speed was significantly increased, improving power performance New Model Prius 2009

Permanent Magnet Motor Manager MG (Motor Generator) MG1 and MG2 Specifications New PRIUS Previous Model MG1 Type Permanent Magnet Motor  Max. System Voltage AC 650 V AC 500 V MG2 Max. Output 60 kW (80 HP) 50 kW (67 HP) Max. Torque 207 Nm (153 ftlbf) 400 Nm (295 ftlbf) * 546 Nm (403 ftlbf) Cooling System Water-cooled Air-cooled MG (Motor Generator) *: Torque is boosted 2.64 times by the motor speed reduction planetary gear unit. New Model Prius 2009

Inverter with Converter Assembly Manager Inverter with Converter Assembly Cooling System Inverter assembly is cooled by the dedicated radiator of a cooling system that is separate from that of the engine cooling system Inverter with Converter Assembly HV Radiator Reserve Tank HV Radiator (for Inverter) Inverter with Converter Assembly HV Radiator Reserve Tank This cooling system (HV water pump with motor) always activates when the power mode is selected to READY-ON state. Radiator for inverter is located above A/C condenser HV Water Pump with Motor HV Radiator HV Transaxle HV Water Pump with Motor New Model Prius 2009

Inverter with Converter Assembly Manager Inverter with Converter Assembly Cooling System Maintenance interval of coolant is slightly changed New PRIUS Previous Model Coolant Type TOYOTA Genuine Super Long Life Coolant (SLLC) or Equivalent  Capacity 3.4 liters (3.6 US qts, 3.0 Imp. qts) — Maintenance Interval Inspect Same as previous model Differ among the destination Replace First Time 240000 km 160000 km Subsequent New Model Prius 2009

HV Control System Various Driving Mode Manager HV Control System Various Driving Mode New PRIUS has a various driving mode. EV Drive Mode Indicator Light Driving with only the electric motor ECO MODE Indicator Light (New Item) Moderates the response of the accelerator pedal operation to support ECO driving EV Drive Mode Indicator Light (Basic operation is the same as the previous model (except –A model). - EV drive mode indicator light informs the driver that the EV drive mode is entered. - In the EV drive mode, the vehicle runs like an electric vehicle which is driven with only the electric motor. ECO MODE Indicator Light (New Items) - ECO MODE indicator light informs the driver that the ECO drive mode is entered. - This mode moderates the response of the accelerator pedal operation to support ECO driving. PWR MODE Indicator Light - PWR MODE indicator light informs the driver that the power mode is entered. - This system optimizes acceleration performance by increasing the motive force in the acceleration pedal opening middle range more than normal. Eco Driving Indicator Light (Basic operation is the conventional vehicle) - Eco driving indicator light informs the driver of whether the accelerator pedal is being operated in an environmental friendly manner by illumination. PWR MODE Indicator Light Optimizes acceleration performance by increasing the motive force in the acceleration pedal opening New Model Prius 2009

High-voltage Cable for HV Battery Manager HV Control System Cutoff of High-voltage Circuits Interlock switch (connector) Inverter with converter assembly portion HV battery portion High-voltage Cable for HV Battery Connector Connector Connector Service Plug New Model Prius 2009

Service Point (Inverter with Converter Assembly) Manager Service Point (Inverter with Converter Assembly) Hybrid Coolant Replacement Draining method Drain plug for hybrid system coolant Filler Plug for Hybrid Transaxle Fluid (10 mm Hexagon) Front Measure the volume of the drained coolant, and replace it with a volume that is greater than the drained coolant (as a guide for bleeding air). Drain Plug for Hybrid Transaxle Fluid (10 mm Hexagon) Drain Plug for Hybrid System Coolant (10 mm Hexagon) New Model Prius 2009