Removal and Installation
1. Release the lock knob at the back of the Intelligent Key and remove the mechanical key.
2. Insert a suitable tool (A) wrapped with a cloth into the slit of the corner and twist it to separate the upper part from the lower part.
CAUTION:

3. Replace the battery with new one.
Battery replacement :Coin-type lithium battery (CR2025)

4. Align the tips of the upper and lower parts, and then push them together until it is securely closed.
CAUTION:
WITHOUT INTELLIGENT KEY SYSTEM
Battery
Keep the battery surface clean and dry.
Clean the battery with a solution of baking
soda and water.
Make certain the terminal connections are
clean and securely tightened.
If the vehicle is not to be used for 30 days or
longer, disconnect the negative (-) battery
terminal cable to ...
Malfunction indicator lamp
Component Function Check
1.CHECK MIL FUNCTION
Turn ignition switch ON.
Make sure that MIL lights up.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC, "Diagnosis Procedure".
Diagnosis Procedure
1.CHECK DTC
Check that DTC UXXXX is not display ...