The mode control actuator mounted on heater unit adjusts position of mode door by operating Direction Motor based on signal of A/C control unit. Pressing mode select switch makes the mode control actuator shift in order of vent? B/L ? floor ? mix.
Air conditioner Control Module sets DTC B1249 if Feedback signal of Mode Actuator has been detected below 0.1V for 100ms.
Item
Detecting Condition
Possible Cause
DTC Strategy
Voltage check
Pooer Connection in harness
Open in signal (Feedback signal),Power or Gruoud circuit
Faulty Mode Actuator
Faulty Air conditioner Control Unit
Enable Conditions
IG KEY ON
Threshold value
Feedback signal of Mode Actuator has been detected below 0.1V for 100ms.
Fail safe
Setting mode : VENT Fix at VENT position
Setting mode : Except VENT Fix at DEF position
? Voltage value of potentiometer as a function of mode door position.
Mode Door Position
Voltage
VENT
0.4±0.3V
BI-LEVEL
1.63±0.3V
FLOOR
2.45±0.3V
MIX
3.6±0.3V
DEF
4.6±0.3