1. 4 DOOR MODEL (STANDARD TYPE)
1. Visually check the bulb for blow out.
2. Check the bulb specification. 
3. Replace the bulb if it is found defective.
2. EXCEPT FOR 4 DOOR MODEL (STANDARD TYPE)
1. Install the high-mounted stop light to test if it illuminates normally.
2. If it fails to illuminate normally, replace the high-mounted stop light with a new part.
NOTE:
Since LED (Light Emitting Diode) is used for the high-mounted stop light, replace the high-mounted stop light assembly if the LED burns out.