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AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System), Diagnostic DTC:B1443/43

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

The air outlet damper servo motor (for driver side mode) 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 mode) to any position, which controls the air outlet changes.

Tip:

Confirm that no mechanical problem is present because this trouble code can be output 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 mode)

  • Air conditioning harness assembly

  • Air conditioning amplifier assembly
A015B4NE06
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

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


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

      Table 1. 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 mode) 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.
      Table 2. Result
      Result Proceed to
      OK (Checking from the DTC) A
      OK (Checking from the PROBLEM SYMPTOMS TABLE) B
      NG C

  2. Click here

    CHECK AIR OUTLET DAMPER SERVO MOTOR (FOR DRIVER SIDE)


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


      Tip:

      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).

      Table 3. Result
      Result Proceed to
      DTC B1443/43 is not output A
      DTC B1443/43 is output B

  3. Click here

    CHECK AIR CONDITIONING HARNESS ASSEMBLY


    1. Replace the air conditioning harness assembly.


    2. Clear the DTCs (Click here).

    3. Check for DTCs (Click here).

      Table 4. Result
      Result Proceed to
      DTC B1443/43 is not output A
      DTC B1443/43 is output B

  4. Click here

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  5. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  6. Click here

    END (AIR OUTLET DAMPER SERVO MOTOR [FOR DRIVER SIDE] IS DEFECTIVE)

  7. Click here

    END (AIR CONDITIONING HARNESS ASSEMBLY IS DEFECTIVE)