why does my Toyota RAV4 Fourth Generation (2013-2018) battery die overnight when parked

Solution

1. Preparation

• Tools Required: Multimeter, wrench set, and cleaning supplies
• Disconnect the negative battery terminal.
• Inspect the battery for any physical damage or swelling.

2. Clean Battery Terminals

• Sub-steps:
  • Use a battery terminal cleaner or a mixture of baking soda and water to clean corroded terminals.
  • Rinse with water and dry thoroughly.
  • Reconnect the terminals securely.

3. Address Parasitic Draw

• Sub-steps:
  • If a specific component was identified as the source of the draw, repair or replace that component (e.g., faulty radio, lights, etc.).
  • Ensure that all doors and the trunk are closing properly to avoid interior lights staying on.

4. Replace Battery (if necessary)

• Sub-steps:
  • If the battery is confirmed to be weak or faulty, replace it with a new one of the same specifications (typically Group 35 for RAV4).
  • Carefully remove the old battery and install the new one, ensuring proper terminal connection.

5. Reconnect and Test

• Reconnect the negative battery terminal.
• Start the vehicle and check the voltage at the battery with the engine running; it should register between 13.8 to 14.5 volts if the alternator is functioning correctly.