CHECK WINDOW DEFOGGER SYSTEM
If the window defogger system is operated when the auxiliary battery voltage is low, due to the electrical load limit control that gives voltage supply priority to the power steering system, the window defogger system may not operate. In this case, check the vehicle control history (RoB) of the power steering system and check that "Battery Voltage Drop: X208F" is not stored before proceeding with troubleshooting.
Turn the ignition switch to ON.
Check that the window defogger wire becomes warm by operating the window defogger switch of the air conditioning control assembly.
When the vehicle is stopped, confirm that the window defogger system operation stops after approximately 15 minutes.