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 B2406 if the air mix actuator dosen’t move to intended position within 40sec (In this case, ECM try to move temp door for 2sec. 3 times, every 20 sec. before setting DTC)
Item | Detecting Condition | Possible Cause |
Monitor Strategy Description | ● Voltage check | ● Poor connection of connected part ● Open circuit in harness ● Short circuit in harness ● Faulty DR Air Mix potentiometer ● Fault A/C Control Unit |
Threshold value | ●< 0.1V | |
Detecting time | ● 0.3sec | |
FAIL SAFE |