The air mix actuator(Temperature Actuator) is located at heater unit. It contains temp motor that changes temp door position and potentiometer that monitors position of temp door.The air mix 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.
DTC B1245 sets if the Driver Air mix actuator(Temperature actuator) Sensor signal is at or below 0.1V for 0.3 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
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Voltage check | 1. Poor Conection in harness 2. Open in signal(Feedback signal), power and ground circuit 3. Faulty Driver air mix actuator 4. Faulty Air condition Contorl Module |
Enable Conditions |
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Ignition ON | |
Threshold value |
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Driver air mix actuator Sensor signal is at or below 0.1V for 0.3 seconds. | |
Failsafe |
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Setting temperature : 63℉-76.1℉, fix at max. cooling position
•
Setting temperature : 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 | 0.3±0.15V |
Max. warm | 4.7±0.15V |
