Temperature control actuator located at heater unit regulates the temperature by the procedure as follows. Signal from control unit adjusts position of temp door by operating temp motor. then temperature will be regulated by the hot/cold air ratio decided by position of temp door
The ECM sets DTC B1246 if there is a short to power harness in the air mix potentiometer.
Item | Detecting Condition | Possible Cause |
Monitor Strategy Description | ● Voltage check | ● Short circuit in harness ● Faulty DR Air Mix potentiometer |
Threshold value | ●>4.9V | |
Detecting time | ● 0.3sec | |
FAIL SAFE | ●If temperature setting 17℃ - 24.5℃ (62-76℉) fix at max. cooling position ●If temperature setting 25℃ - 32℃ (77-90℉) fix at max. heaing position |