The temperature control actuator is located at the heater unit. The actuator consists of a motor and feedback potentiometer that is used by the A/C ECU to control air temperature and to monitor actuator operation. The Air mix actuator(Temperature 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 10 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Poor contact in harness 2. Open or short in motor power circuit 3. Faulty Driver air mix actuator 4. Faulty air conditioner control module |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
No movement to controlled mode position for 10 seconds. | |
Failsafe |
•
Fixed as current position |
Door position | Voltage |
Max. cool | 0.4 V±0.3V |
Max. warm | 4.6 V±0.3V |
