Toyota Yaris: Owner Maintenance / Key Battery Replacement

Toyota Yaris XP210 (2020-2021) Owner's Manual / Maintenance and Care / Owner Maintenance / Key Battery Replacement

If the buttons on the smart key are inoperable and the operation indicator light does not flash, the battery may be dead. Replace with a new battery before the smart key becomes unusable.

The following conditions indicate that the battery power is low:

  • The KEY indicator light (green) flashes in the combination meter for about 30 seconds after the engine is switched OFF.
  • The system does not operate and the operation indicator light on the smart key does not flash when the buttons are pressed.
  • The system’s operational range is reduced.

Replacing the battery at your Toyota dealer is recommended to prevent damage to the key. If replacing the battery by yourself, follow the instruction below.

Replacing the key battery

  1. Press the knob and pull out the auxiliary key.

    Toyota Yaris. Key Battery Replacement

  2. Twist a tape-wrapped flathead screwdriver in the direction of the arrow and open the cover slightly.

    Toyota Yaris. Key Battery Replacement

  3. Insert the tape-wrapped flathead screwdriver into the gap and slide it in the direction of the arrow.

    Toyota Yaris. Key Battery Replacement

  4. Twist the flathead screwdriver in the direction of the arrow and remove the cover.

    Toyota Yaris. Key Battery Replacement

  5. Remove the battery cap, then remove the battery.

    Toyota Yaris. Key Battery Replacement

  6. Insert a new battery with the positive pole facing up, and then cover the battery with the battery cap.

    Toyota Yaris. Key Battery Replacement

  7. Close the cover.

    Toyota Yaris. Key Battery Replacement

  8. Reinsert the auxiliary key.

NOTICE

  • Make sure the battery is installed correctly. Battery leakage could occur if it is not installed correctly.
  • When replacing the battery, be careful not to touch any of the internal circuitry and electrical terminals, bend the electrical terminals, or get dirt in the smart key as the smart key could be damaged.
  • There is the danger of explosion if the battery is not correctly replaced.
  • Dispose of used batteries according to the following instructions.
    • Insulate the plus and minus terminals of the battery using cellophane or equivalent tape.
    • Never disassemble.
    • Never throw the battery into fire or water.
    • Never deform or crush.
  • Replace only with the same type battery (CR2025 or equivalent).
  • Be careful not to allow the rubber ring shown in the figure to be scratched or damaged.
  • If the rubber ring detaches, reattach it before inserting a new battery.

    Toyota Yaris. Key Battery Replacement

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