DTC    43    Air Outlet Damper Control Servo Motor Circuit

for Preparation Click here


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.

HINT:
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.
  1. Mode damper servo sub-assembly
  2. Air conditioning amplifier assembly
  3. Harness or connector

WIRING DIAGRAM


E233156E04


INSPECTION PROCEDURE

1.PERFORM ACTUATOR CHECK

  1. Warm up the engine.

  1. Enter actuator check mode (Click here).

  1. 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.

    HINT:
    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
Go to step 2
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 D2 mode damper servo sub-assembly connector.

  1. Disconnect the A38 and A37 air conditioning amplifier assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D2-4 - A38-4 (AOD)
    		Always
    		Below 1 Ω
    D2-5 - A38-3 (AOF)
    D2-2 - A37-26 (POA)
    D2-3 - A37-25 (POB)
    D2-1 - A37-11 (SG-2)
    D2-4 - Body ground
    		Always
    		10 kΩ or higher
    D2-5 - Body ground
    D2-2 - Body ground
    D2-3 - Body ground
    D2-1 - 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).

  1. 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)