The Temperature Control Actuator(Air mix potentiometer) 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 .
DTC B1246 sets if Driver Air mix actuator(Temperature actuator) sensor signal is at or over 4.9V for 0.3 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Short to battery in signal circuit.(Feedback signal) 2. Faulty Driver temperature control actuator. 3. Air conditioner Control Module. |
Enable Conditions |
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Ignition ON | |
Threshold value |
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Driver Air mix actuator(Temperature actuator) sensor signal is at or over 4.9V for 0.3 seconds. | |
Failsafe |
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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℉) |
※ Voltage value of temperature control actuator(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 |
