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High Voltage Safety

The HV battery pack powers the high voltage electrical system with DC electricity. Positive

and negative orange colored high voltage power cables are routed from the battery pack, under

the vehicle floor pan, to the inverter/converter. The inverter/converter contains a circuit that

boosts the HV battery voltage from 201.6*1, 207.2*2 or 222.0*3 to 600 Volts DC. The

inverter/converter creates 3-phase AC to power the motor. Power cables are routed from the

inverter/converter to each high voltage motor (electric motor, electric generator, and A/C

compressor). The following systems are intended to help keep occupants in the vehicle and

emergency responders safe from high voltage electricity:

*1: for Nickel-Metal hydride battery

*2: for Lithium-ion battery (2ZR-FXE)

*3: for Lithium-ion battery (M20A-FXS)

High Voltage Safety System

• A high voltage fuse * provides short circuit protection in the HV battery pack.

• Positive and negative high voltage power cables * connected to the HV battery pack are

controlled by 12 Volts normally open relays *. When the vehicle is shut off, the relays

stop electricity flow from leaving the HV battery pack.

WARNING:

・ The high voltage system may remain powered for up to 10

minutes after the vehicle is shut off or disabled. To prevent

serious injury or death from severe burns or electric shock,

avoid touching, cutting, or breaching any orange high

voltage power cable or high voltage component.

• Both positive and negative power cables * are insulated from the metal body. High

voltage electricity flows through these cables and not through the metal vehicle body.

The metal vehicle body is safe to touch because it is insulated from the high voltage

components.

• A ground fault monitor in the hybrid vehicle computer * continuously monitors for high

voltage leakage to the metal chassis while the vehicle is running. If a malfunction is

detected, the hybrid vehicle computer * will illuminate the master warning light in

the instrument cluster and a message indicating that the hybrid system is malfunctioning

will be displayed on the multi-information display.

• The HV battery pack relays will automatically open to stop electricity flow in a collision

sufficient to activate the SRS.

*Numbers apply to the illustration on the following page.