The mode control actuator is mounted at the heater control unit. The mode control actuator consists of a motor and a feedback potentiometer. Pressing mode select switch makes the mode control actuator shift in order of vent→ B/L → floor → mix.
Air conditioner Control Module sets DTC B1250 if Feedback signal of Mode Actuator has been detected over 4.9V for 100ms.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check |
•
Short in signal circuit(Feedback signal)
•
Faulty Mode Actuator
•
Faulty Air conditioner Control Module |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Feedback signal of Mode Actuator has been detected over 4.9V for 0.3 seconds | |
Failsafe |
•
If the Mode actuator is placed at Vent mode right before fail detection, Actuator is operated and fixed to Vent Mode Postion.
•
In case of the others, Actuator is moved to DEF mode position |
Mode Door Position | Voltage |
VENT | 0.4±0.3V |
BI-LEVEL | 1.45±0.3V |
FLOOR | 2.5±0.3V |
MIX | 3.55±0.3V |
DEF | 4.6±0.3V |
