Auto defogger sensor is installed on front window glass. For safety driving, Auto defogger sensor judges and sends signal of the occurance of moisture in advance of blowing out the wind for defogging with improvement of visiablilty and comfort.
While controlling the temperature and Mode(direction of wind) set by driver, if the humidity is higher than certain level, Air condtioner control Module automatically controls auto defogging mode. Air conditioner control module changes to go back to the previous driver set mode, if the humidity is decreased.
Air conditioner control Module automatically controls Intake actuator, A/C, Defogger actuator, Blower motor rpm, Mode actuator in accordance with the amount of humidity on the front glass.
The Air conditioner Control Module sets DTC B1285 if auto defogger mode actuator has not been moved to the mode,where air condition control module controls, within 10 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Poor contact in harness 2. Open or short in motor power circuit 3. Faulty auto defoger mode actuator 4. Faulty air conditioner control module |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
No movement to controlled mode position for 10 seconds. | |
Failsafe |
•
Fixed as current position |
※ The voltage of auto defoger mode actuator in accordance with position
Door position | Voltage |
CLOSE(VENT, B/L) | About 4.7V |
FLOOR | About 3.94V |
MIX | About 3.29V |
OPEN(DEF) | About 1V |
