DTC B1441: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [12/2013 - ]: Description

The No. 1 air conditioning radiator damper servo sub-assembly (air mix) sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on these signals to move the No. 1 air conditioning radiator damper servo sub-assembly (air mix) to the appropriate position. As a result, the amount of air passing through the heater core after passing the evaporator is adjusted, and the temperature of the air blowing toward the passenger side is controlled. The air conditioning amplifier assembly communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness assembly.