AIR CONDITIONING SYSTEM, Diagnostic DTC:B1455/55

DTC Code DTC Name
B1455/55 Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit

DESCRIPTION

Air outlet damper servo motor (for DEF 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 DEF mode) 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
B1455/55 The air outlet damper position does not change even if the air conditioning amplifier assembly operates the air outlet damper servo motor (for DEF mode)
  • Air outlet damper servo motor (for DEF mode)

  • Air conditioning harness assembly

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A01ER04E28

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 FOOT/DEF Pos(P)

      Air outlet damper servo motor (for DEF mode) target pulse /

      Min.: 6, Max.: 117


      • FACE1: 117 (pulse)

      • FACE2: 109 (pulse)

      • B/L1: 93 (pulse)

      • B/L2: 81 (pulse)

      • FOOT-D: 52 (pulse)

      • FOOT-R: 41 (pulse)

      • FOOT-F: 41 (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
    C
    A
  2. CHECK AIR OUTLET DAMPER SERVO MOTOR (FOR DEF MODE)


    1. Replace the air outlet servo motor (for DEF mode) Click here.

      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 B1455/55 is not output A
      DTC B1455/55 is output B

    B
    A
  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 B1455/55 is not output A
      DTC B1455/55 is output B

    B
    A