The Air Mix actuator contains a motor that changes temp door position and a potentiometer that monitors position of temp door. The Air mix actuator(Temperature actuator) regulates the temperature by operating temp door motor. The potentiometer delivers temp door position to the A/C ECU .
The Air conditioner Control Module sets DTC B1246 if Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected over 4.9V for 0.3 seconds.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage check |
•
Short to battery in signal circuit(Feedback signal)
•
Faulty Driver temperature Actuator
•
Air conditioner Control Module |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected over 4.9V for 0.3 seconds | |
Failsafe |
•
If the Driver set temperature is below 24℃(76.1℉) right before fail detection, Actuator is operated and fixed to Cool Postion.
•
Actuator is operated and fixed to Warm Position if set temperature is over 25℃(77℉) |
Door position | Voltage |
Max. cool | 0.3±0.15V |
Max. warm | 4.7±0.15V |
