The mode control actuator mounted on heater unit adjusts position of mode door by generating Direction Motor in accordance with signal of A/C control unit. Pressing mode select switch makes the mode control actuator shift in order of vent→ B/L → floor → mix.
The ECM sets DTC B1249 if there is an open circuit or poor connection of connected part in the Direction potentiometer.
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 Direction potentiometer |
Threshold value | ●＜0.1V | |
Detecting time | ● 0.3sec | |
FAIL SAFE | ●fix vent position ●fix in defrost mode |
