DTC B1441/41 Air Mix Damper Control Servo Motor Circuit (Passenger Side): Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The air mix control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The A/C amplifier activates the motor (normal or reverse) based on these signals to move the air mix damper (front passenger side) to the appropriate position. This adjusts the amount of air passing through the heater core after passing the evaporator and controls the temperature of the blown air The A/C amplifier communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness.
HINT.
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1441/41 | Air mix damper position sensor value does not change even if A/C amplifier operates air mix control servo motor |
|