It contains intake motor that changes intake door position and potentiometer that monitors position of intake door. When driver operates the intake switch, ECU receives mode signal from intake switch and operates intake door motot to turn intake door to intended position. (with FRE mode signal, intake door is closed and with REC mode signal, intake door is opened)
In operation, potentiometer delivers intake door position transformed into voltage value to A/C ECU.
Airconditioner Control Module sets DTC B1209 if the Feed Back signal of Intake Actuator has been detected over 4.9V for 100ms.
Item
Detecting Condition
Possible Cause
DTC Strategy
Voltage check
Short to battery in signal(Feedback) circuit
Open in ground circuit
Faulty Intake Actuator
Faulty Air Conditioner Module
Enable Conditions
IG KEY ON
Threshold value
Feedback circuit has been detected over 4.9V for 100ms.
Fail safe
Intake Actuator is moved and fixed at FRE position if FRE is selected or REC position if REC is selected.
? Voltage value of Intake potentiometer as a function of position of Intake door
Door position
Voltage
FRE
0.4V
REC
4.6V