GENERAL
The rear window defogger wire (back window glass) is attached to the inside of the rear window and defogs the window surface quickly when the rear window defogger switch is pressed. The indicator light on the switch illuminates while the system is operating. This system automatically turns off after approximately 15 minutes.
Note
If the battery voltage is low, the window defogger system may not operate due to operation of battery load control, check the Data List item "Battery Control Count (Body ECU)".
Tech Tips
If both of the following conditions are met after approximately 15 minutes from when the window defogger system was activated, the window defogger system continues to operate up to approximately 45 minutes. If the following conditions are not met, the window defogger system stops operating immediately.
The outside temperature is -3°C (27°F) or lower.
Power generated by the generator assembly installed to the vehicle is stable.
The window defogger system is linked with the mirror heater function.*
*: w/ Mirror Heater System
FUNCTION OF MAIN COMPONENT
| Component | Outline |
|---|---|
| Rear window defogger switch (Radio and display receiver assembly)*1 | Sends signals to the air conditioning amplifier assembly to operate the window defogger system. |
| Rear window defogger switch (Air conditioning control assembly)*2 | |
| Air conditioning amplifier assembly | Sends a window defogger system activation request signal to the DEF relay. |
| DEF Relay | Receives a window defogger system activation request signal from the air conditioning amplifier assembly and supplies power to the rear window defogger wire (back window glass). |
| Rear window defogger Wire (Back window glass) | Receives power from the DEF relay and heats the rear window using the rear window defogger wire (back window glass). |
*1: for 8 Inch Display
*2: except 8 Inch Display