It contains temp motor that changes temp door position and potentiometer that monitors position of temp door. The Air mix actuator(Temperature actuator) regulates the temperature by the procedure as follows. Signal from control unit adjusts position of temp door by operating temp motor and then temperature will be regulated by the hot/cold air ratio decided by position of temp door. In operation, potentiometer delivers temp door position transformed into voltage value to A/C ECU .
Air conditioner Control Module sets DTC B1245 if Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected open or below 0.1V for 100ms.
Item
Detecting Condition
Possible Cause
DTC Strategy
Voltage check
Poor Conection in harness
Open in signal(Feedback signal), power and ground circuit
Faulty Driver Temperature Actuator
Faulty Air condition Contorl Module
Enable Conditions
IG KEY ON
Threshold value
Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected open or below 0.1V for 100ms.
Fail safe
Setting temperature : 17~24.5?(63?~76.1?), fix at max. cooling position
Setting temperature : 25?~32?(77?~ 89.6?), fix at max. heating position
? Voltage value of Air Mix potentiometer as a function of temp door position.
Door position
Voltage
Max. cool
0.4±0.15V
Max.warm
4.5±0.15V