Dtc B1443/43 Air Outlet Damper Control Servo Motor Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

READ VALUE USING INTELLIGENT TESTER (MODE DAMPER SERVO)

CHECK FOR DTC

CHECK DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

CHECK AIR CONDITIONING HARNESS ASSEMBLY

DTC B1443/43 Air Outlet Damper Control Servo Motor Circuit


DESCRIPTION

The damper servo sub-assembly (mode damper servo) 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 to any position, which controls the air outlet changes.
HINT:
Confirm that no mechanical problem is present because this trouble code may 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 when the air conditioning amplifier assembly operates the damper servo sub-assembly (mode damper servo).
  1. Damper servo sub-assembly (mode damper servo)
  2. Air conditioning harness assembly
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1443/43 Air Outlet Damper Control Servo Motor Circuit


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM000002LIT049X.html).

  1. Check for DTCs (LandCruiser RM000002LIT049X.html).

    Result
    Result
    		Proceed to
    DTC B1443/43 is not output
    		A
    DTC B1443/43 is output
    		B
    DTC B1443/43 and B1497/97 are output
    		C


B
Go to step 2

C
GO TO B1497/97 (LandCruiser RM000002LLQ052X.html)
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

2.READ VALUE USING INTELLIGENT TESTER (MODE DAMPER SERVO)

  1. Use the Data List to check if the damper servo sub-assembly (mode damper servo) is functioning properly (LandCruiser RM000002LIV040X.html).

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Air Outlet Servo Pulse (D)
    		Damper servo sub-assembly (mode damper servo) actual pulse / Min.: 0, Max.: 255
    		15 (pulse): FACE 1
    23 (pulse): FACE 2
    41 (pulse): B/L
    65 or 73 (pulse): FOOT
    83 or 95 (pulse): F/D
    113 (pulse): DEF
    		-
    Air Outlet Servo Actu Pulse (D)
    		Damper servo sub-assembly (mode damper servo) actual pulse / Min.: 0, Max.: 255
    		15 (pulse): FACE 1
    23 (pulse): FACE 2
    41 (pulse): B/L
    65 or 73 (pulse): FOOT
    83 or 95 (pulse): F/D
    113 (pulse): DEF
    		-
    OK:
    The display is as specified in the normal condition column.
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to the DTC)
    		A
    OK (When troubleshooting according to Problem Symptoms Table)
    		B
    Both target pulse and actual pulse do not display
    		C
    Target pulse displays normally, but actual pulse does not display
    		D


B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)

C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (LandCruiser RM0000039R5028X.html)

D
Go to step 4
A


3.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM000002LIT049X.html).

  1. Check for DTCs (LandCruiser RM000002LIT049X.html).

    OK:
    DTC B1443 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (LandCruiser RM0000039R5028X.html)
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

4.CHECK DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

  1. Replace the damper servo sub-assembly (mode damper servo) (LandCruiser RM000003AXS04FX.html).

    HINT:
    Since the damper servo sub-assembly (mode damper servo) cannot be inspected while it is removed from the vehicle, replace the damper servo sub-assembly (mode damper servo) with a new or normally functioning one.

  1. Clear the DTCs (LandCruiser RM000002LIT049X.html).

  1. Check for DTCs (LandCruiser RM000002LIT049X.html).

    OK:
    DTC B1443 is not output.


NG
Go to step 5
OK

END (DAMPER SERVO SUB-ASSEMBLY [MODE DAMPER SERVO] IS FAULTY)

5.CHECK AIR CONDITIONING HARNESS ASSEMBLY

  1. Temporarily replace the air conditioning harness assembly with a new or normally functioning one (LandCruiser RM000003AXS04FX.html).

  1. Clear the DTCs (LandCruiser RM000002LIT049X.html).

  1. Check for DTCs (LandCruiser RM000002LIT049X.html).

    OK:
    DTC B1443 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (LandCruiser RM0000039R5028X.html)
OK

END (AIR CONDITIONING HARNESS ASSEMBLY IS FAULTY)