AIR CONDITIONING SYSTEM, Diagnostic DTC:B1443/43

DTC Code DTC Name
B1443/43 Air Outlet Damper Control Servo Motor Circuit

DESCRIPTION

The air outlet damper servo motor (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 or reverse) based on the signals to move the air outlet damper (for driver side) to any position, which controls the air outlet changes.

Tech Tips

Confirm that no mechanical problem is present because this trouble code can be stored when either a damper link or damper is mechanically locked.

DTC Code DTC Detection Condition Trouble Area
B1443/43 The air outlet damper position does not change even if the air conditioning amplifier assembly operates the air outlet damper servo motor.

  • Air outlet damper servo motor (for driver side)

  • Air conditioning harness assembly

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A01ER04E23

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (AIR OUTLET DAMPER SERVO MOTOR)


    1. Use the Data List to check if the servo motor is functioning properly.

      Air Conditioner
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/O Damper FACE Pos(D)

      Air outlet damper servo motor (for driver side) target pulse /

      Min.: 6, Max.: 117

      FACE1: 117 (pulse)

      FACE2: 109 (pulse)

      B/L1: 93 (pulse)

      B/L2: 81 (pulse)

      FOOT-F: 41 (pulse)

      FOOT-R: 41 (pulse)

      FOOT-D: 52 (pulse)

      F/D: 18 (pulse)

      DEF: 6 (pulse)

      		 -
      OK
      The display is as specified in the normal condition.
      Result
      Result Proceed to
      OK (Checking from the DTC) A
      OK (Checking from the PROBLEM SYMPTOMS TABLE) B
      NG C

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

  2. CHECK AIR OUTLET DAMPER SERVO MOTOR


    1. Replace the air outlet damper servo motor (for driver side)


      Tech Tips

      Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1443/43 is not output A
      DTC B1443/43 is output B

    B

    CHECK AIR CONDITIONING HARNESS ASSEMBLY Click here

    A

    END (AIR OUTLET DAMPER SERVO MOTOR IS DEFECTIVE)

  3. CHECK AIR CONDITIONING HARNESS ASSEMBLY


    1. Replace the air conditioning harness assembly.


    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1443/43 is not output A
      DTC B1443/43 is output B

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

    END (AIR CONDITIONING HARNESS ASSEMBLY IS DEFECTIVE)