DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit: Description

The air inlet control servo motor sends pulse signals to indicate the damper position to the air conditioning amplifier. The air conditioning amplifier activates the motor (normal or reverse) based on these signals to move the air inlet control damper to the appropriate position, which controls the air inlet modes (FRESH, FRESH / RECIRCULATION and RECIRCULATION).

HINT: 

Confirm that there are no mechanical problems because this DTC can be set if either a damper link or damper is mechanically locked.