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13. Toyota/Lexus Hybrid Vehicles. Hybrid and Alternative Fuel Vehicles, Third Edition James D. Halderman. FIGURE 13.1 The second-generation Prius is larger than the first generation (upper vehicle). FIGURE 13.2 The major components of a second-generation Prius.
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13 Toyota/LexusHybrid Vehicles Hybrid and Alternative Fuel Vehicles, Third Edition James D. Halderman
FIGURE 13.1 The second-generation Prius is larger than the first generation (upper vehicle).
FIGURE 13.2 The major components of a second-generation Prius.
FIGURE 13.3 Dash readouts of 2001–2003 Prius. Note “Turtle” at top right. An outline of a turtle will illuminateon the right-hand side of the display when the NiMH battery pack does not have a sufficient charge to provide additional torque. There is nothing wrong with the vehicle; it just needs to be driven less aggressively so thatthe generator can keep up with the NiMH battery pack depletion.
FIGURE 13.4 The energy monitor screen indicates where the mechanical and electrical energy is flowing during vehicle operation.
FIGURE 13.5 The consumption screen gives feedback to the driver as to how well his or her driving style isconserving fuel.
FIGURE 13.7 All Toyota hybrid vehicles have a “B” shifter position, as seen on the Camry hybrid.
FIGURE 13.8 To engage Park on a second-generation Prius, stop the vehicle and press the “P” button.
FIGURE 13.9 The second-generation Prius uses an electronic sensor to replace the conventional gear shift selector.
FIGURE 13.10 The light on the POWER button is off when the vehicle is in READY mode.
FIGURE 13.11 When the bypass valve is closed, the exhaust gases are forced through the HC adsorber, whichstores unburned hydrocarbons until the TWC is up to temperature.
FIGURE 13.12 The Prius stores its fuel in a resin bladder located inside a steel tank.
FIGURE 13.13 The first-generation Prius battery pack with 38 modules. All of the battery cells are connected in series to create the HV battery.
FIGURE 13.14 The electronic controls used in a Toyota hybrid vehicle. Notice the system main relays (SMR), battery ECU, and the interconnection of the various components and systems.
FIGURE 13.15 High-voltage battery pack cooling on a second-generation Prius.
FIGURE 13.16 An under hood view of the Toyota hybrid system on a Toyota Camry with all covers in place.
FIGURE 13.18 Powertrain schematic for the 4WD versions of the Highlander Hybrid and RX400h. Note that MGR alone is used to drive the vehicle’s rear wheels.
FIGURE 13.19 The inverter assembly from a first generation Prius. The inverter performs multiple functions in the THS system.
FIGURE 13.20 Air vent at the front edge of the rear seat in a Lexus RX 400h. This vent has to be kept clear to ensure proper battery operation.
FIGURE 13.21 The boost converter is used to increase HV battery voltage to as high as 650 volts for use by the electric motors.
FIGURE 13.22 The rear-mounted electric motor (MGR) is used on four-wheel-drive versions of the Lexus RX 400hand Toyota Highlander.
FIGURE 13.23 The EPS unit on a Toyota Highlander hybrid is powered by 42 volts supplied by a separate DC-DC converter.
FIGURE 13.24 The Toyota Camry hybrid electric vehicle does not look any different from a regular Camry except for the emblem on the side and rear of the vehicle.
FIGURE 13.25 The Camry Hybrid battery pack as viewed from the passenger compartment. Note the cooling fanassembly on top of the battery case.
FIGURE 13.26 The 2007 Camry Hybrid inverter assembly is more compact than those found in previous Toyota HEVs.
FIGURE 13.27 The high-voltage (HV) service plug being removed on a second-generation Prius. The handlemust be lifted straight up before rotating to the left for removal.
FIGURE 13.28 Verify that the system has been de-energized using a DMM before touching any part of the high-voltage system.
FIGURE 13.29 Removing the service plug on a Toyota Highlander Hybrid. This service plug is located behind a plastic panel on the left side of the rear passenger seat.
