17
HIGH VOLTAGE ELECTRICAL SYSTEM:
The high voltage electrical system on the 2006 Lexus 400h is similar in design to other
vehicles that are currently on the market built by Toyota Motor Corporation. The system
uses a high voltage storage battery that is located under the rear seat area of the vehicle
which has a voltage of 288 VDC. High voltage electric wiring runs under the vehicle
from the battery pack to converter/inverter under the hood where the 288 VDC is
converted to 650 VAC to power each electric drive motor. The front drive motor
assembly is incorporated in the transaxle under the hood and the rear one is located in the
rear differential on the back axle. In addition to high voltage wiring going to the
transaxle under the hood, the Lexus RX400h also uses an electrically powered air
conditioning compressor that is powered off of the high voltage electrical system as well
as electrically assisted power steering.
NOTE: All High Voltage wiring is wrapped in a bright orange plastic loom so it is easy
to identify. For your safety, avoid contact with the bright orange loom whenever
possible.
As you can see from what is shown in Figure 12, most of the high voltage components
are located under removable plastic panels, some of which have built in micro switches
which disable the high voltage system when moved.
Figure 12
All high voltage systems have several levels of safety built into them to prevent personal
injury to people either servicing or operating these vehicles. If any level of the safety
barrier is breached on these vehicles, the high voltage system becomes inoperative, so
risk of personal injury from providing service to these vehicles is very low.
To Previous Page
Loading...
