For 1990-2009 cars

The maintenance-free battery is standard in all vehicles. The battery is completely sealed except for two small vent holes in the sides. These vent holes allow the small amount of gas produced in the battery to escape.

The battery has the three following functions in the electrical system:

• | Provides a source of energy for cranking the engine

• | Acts as a voltage stabilizer for the electrical system

• | Provides, for a limited time, the energy when the electrical load used exceeds the output of the generator.

The battery specification label contains information pertinent to the servicing of the battery. This information includes test ratings and both of the original equipment and the recommended replacement part numbers. Refer to Battery Usage .

### Battery Rundown Protection Feature

A battery rundown protection feature has been added to this vehicle to extend the battery life. This means that all parasitic and inadvertence loads are automatically turned off after a predetermined time interval. Inadvertent and parasitic loads are any modules or functions that drain current from the battery.

• | Parasitic loads draw small amounts of current when the ignition is OFF. The radio and the remote keyless entry are two examples of systems that cause parasitic loads on the battery.

• | Inadvertent loads are higher current loads that may be left on accidentally. The courtesy lights, the glove compartment light, and the luggage compartment light are some examples of systems that can cause an inadvertent load on the battery.

Battery rundown protection operates in two different modes:

• | Dealer/Plant Mode: Battery rundown protection operates in the dealer/plant mode until the vehicle has logged 15 miles. While in the dealer/plant mode, battery rundown protection will operate in the following ways:

• | If an inadvertent load is placed on the battery (door left ajar, light left on, etc.), the battery power will turn off after three minutes. When this occurs, inadvertent power function can be restored in the following ways:

• | Opening and closing a door

• | Cycling the ignition switch

• | Parasitic load drains on the battery will be disabled by the battery protection feature if the vehicle is left untouched for three days. The battery power will then shut off completely, and all radio presets will be erased. The remote keyless entry function will not operate. When this occurs, parasitic power functions can be reset by cycling the ignition

• | Customer Mode: After the vehicle has logged 15 miles, battery rundown protection will operate in the customer mode . Battery rundown protection operates the same way in customer mode as it does in dealer/plant mode with the following exceptions:

• | The inadvertent power shuts off after 20 minutes.

• | The parasitic power shuts off after 24 days.