Temperature control actuator located at heater unit. It contains temp motor that changes temp door position and potentiometer that monitors position of temp door.Temperature control 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 B2406 if Driver air mix actuator has not been moved to the mode,where air condition control module controls, within 40 seconds.
Item
Detecting Condition
DTC Strategy
Voltage check
Poor contact in harness
Open or short in motor power circuit
Faulty Driver air mix actuator
Faulty air conditioner control module
Enable Conditions
IG KEY ON
Threshold value
No movement to controlled mode position for 40 seconds
Failsafe
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
Door position
Voltage
Max. cool
0.3±0.15V
Max. warm
4.7±0.15V