DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [10/2014 - ]: Description

The No. 2 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal, reverse) based on the signals to move the No. 2 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) to any position. As a result, the amount of air passing through the heater core after passing through the evaporator is adjusted, and the temperature of the air blowing toward the driver seat 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.