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

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

DESCRIPTION

The mode damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the mode damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on the signals to move the mode damper to any position, which controls the mode changes.

Tech Tips

This DTC is also output if the mode damper and damper link are malfunctioning or unable to move properly. When this DTC is output, confirm that the mechanical parts of the mode damper and damper link are not defective or damaged.

DTC Code Detection Item Trouble Area
43 The mode damper position does not change when the air conditioning amplifier assembly operates the mode damper servo sub-assembly.

  • Mode damper servo sub-assembly

  • Air conditioning amplifier assembly

  • Harness or connector

WIRING DIAGRAM

A01DXUVE02

INSPECTION PROCEDURE

Note

When DTC 41, 42 and 43 are output at same time, there would be malfunctioning on power source circuit Click here.

PROCEDURE


  1. PERFORM ACTUATOR CHECK


    1. Warm up the engine.

    2. Enter actuator check mode Click here.

    3. Place your hand in front of a vent and check that the mode damper position changes according to the display code.

      Display Code Mode Damper Position
      0 FACE
      1 FACE
      2 FACE
      3 FACE
      4 FACE
      5 BI-LEVEL
      6 FOOT
      7 FOOT
      8 FOOT/DEF
      9 DEF
      OK
      Mode damper position changes in accordance with each display code.

      Tech Tips

      The progression through the steps of the actuator check can be changed from automatic to manual by pressing the front DEF switch.

      Result
      Result Proceed to
      OK (When troubleshooting according to problem symptoms table.) A
      OK (When troubleshooting according to DTC.) B
      NG C

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (MODE DAMPER SERVO - AIR CONDITIONING AMPLIFIER) Click here

    A

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

  2. CHECK HARNESS AND CONNECTOR (MODE DAMPER SERVO - AIR CONDITIONING AMPLIFIER)


    1. Disconnect the D16 mode damper servo sub-assembly connector.

    2. Disconnect the A44 and A46 air conditioning amplifier assembly connectors.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D16-4 - A44-4 (AOD) Always Below 1 Ω
      D16-5 - A44-3 (AOF)
      D16-2 - A46-26 (POA)
      D16-3 - A46-25 (POB)
      D16-1 - A46-11 (SG-2)
      D16-4 - Body ground Always 10 kΩ or higher
      D16-5 - Body ground
      D16-2 - Body ground
      D16-3 - Body ground
      D16-1 - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE MODE DAMPER SERVO SUB-ASSEMBLY


    1. Temporally replace the mode damper servo sub-assembly with a new or normally functioning one Click here.

    2. Check the mode damper operates normally.

      OK
      Mode damper operates normally.

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

    END (MODE DAMPER SERVO IS DEFECTIVE)