Mirror Heater does not Operate with Rear Defogger Switch [12/2019 - 11/2023]: Description

When the mirror heater switch (rear window defogger switch) on the air conditioning control assembly is pressed, the operation signal is sent to the air conditioning amplifier assembly via LIN communication. When the air conditioning amplifier assembly receives the signal, it turns on the DEF relay and MIR HTR relay to operate the mirror heaters.