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Home > What to do in an emergency > If the 12 volt battery is discharged > Before jump starting

Before jump starting

This vehicle does not have a regular 12V battery that needs periodic replacement. It is lithium ion polymer type integrated into the HEV high voltage battery. The vehicle has a 12V battery protection system that cuts 12V battery from vehicle draw to prevent full discharge.

Using the 12V battery reset button

  1. Press the 12V Battery Reset button to reconnect the 12V battery.

  2. Start the vehicle within 15 seconds of pressing the 12V Battery Reset button.

  3. After starting the vehicle ( indicator on), operate the vehicle safely outdoors in ready mode stopped and/or drive it for 30 minutes total to charge the 12V battery fully.

CAUTION

If you do not start the vehicle immediately after pressing the 12V Battery Reset button, the power of 12V battery is automatically disconnected after few seconds to save the 12V battery from additional discharge. If the 12V battery is disconnected prior to starting the vehicle, press the 12V Battery Reset button again and then immediately start the vehicle as explained.

Repeated use of the 12V Battery Reset button without a sufficient engine ON cycle (30 Min+) may cause over discharge of the 12V battery, which will prevent the vehicle from starting.

If the 12V battery is over discharged to a point that the reset does not work, try to jump start the vehicle.

CAUTION

After starting the vehicle ( indicator on), the 12V battery is being charged whether the engine is running or not. Although there is no engine sound, it is unnecessary to depress the accelerator pedal.

The following items may need to be reset after the battery has been discharged or the battery has been disconnected.

See chapter 4 and 5 for:

  • Power Windows

  • Trip Computer

  • Climate Control System

  • Audio System

  • Panorama sunroof

NOTICE

External power source using 12V battery

The use of external power accessories may reduce performance and function of the vehicle. Especially, the use of dash cameras may shut off the power of the vehicle prior to the dash camera’s automatic shut-down.

If the power of the vehicle is shut off, start the vehicle as explained. (refer to More Details)

Using the Trunk Open Button

  1. If the battery protection system is activated after parking, the power function will stop and the door cannot be opened using the smart key.

  2. When you press the trunk open button, the 12V BATT RESET is activated and you can open the door using the smart key.

  3. Start the engine within approximately 30 seconds after pressing the trunk open button.

  4. Stop or drive for 30 minutes with the () (green indicator, ready to drive) on the cluster turned on.

* After starting the engine (() (ready to drive) indicator light comes on), the 12V battery is charged regardless of whether the engine is running or not. Even if there is no engine sound, there is no need to press the accelerator pedal.