Dtc B1443/43 Air Outlet Damper Control Servo Motor Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (AIR OUTLET SERVO PULSE [D], AIR OUTLET SERVO ACTU PULSE[D])

CHECK MODE DAMPER SERVO MOTOR

CHECK AIR CONDITIONING HARNESS ASSEMBLY

CHECK FOR DTC

DTC B1443/43 Air Outlet Damper Control Servo Motor Circuit


DESCRIPTION

The mode damper servo motor 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 mode damper servo motor to any position, which controls the air outlet changes.
HINT:
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.
  1. Mode damper servo motor
  2. Air conditioning harness assembly
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1443/43 Air Outlet Damper Control Servo Motor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING GTS (AIR OUTLET SERVO PULSE [D], AIR OUTLET SERVO ACTU PULSE[D])

  1. Use the Data List to check if the mode damper servo motor is functioning properly (Click here).

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Air Outlet Servo Pulse (D)
    		Mode damper servo motor target pulse / Min.: 128, Max.: 383
    1. FACE1: 245 (pulse)
    2. FACE2: 237 (pulse)
    3. B/L1: 221 (pulse)
    4. B/L2: 209 (pulse)
    5. FOOT-O: 199 (pulse)
    6. FOOT-D: 180 (pulse)
    7. FOOT-R: 169 (pulse)
    8. FOOT-F: 169 (pulse)
    9. F/D: 146 (pulse)
    10. DEF: 134 (pulse)
    1. Displayed between 134 and 245 pulse
    2. Mode damper servo motor system malfunction
    Air Outlet Servo Actu Pulse(D)
    		Mode damper servo motor actual pulse / Min.: 128, Max.: 383
    1. FACE1: 245 (pulse)
    2. FACE2: 237 (pulse)
    3. B/L1: 221 (pulse)
    4. B/L2: 209 (pulse)
    5. FOOT-O: 199 (pulse)
    6. FOOT-D: 180 (pulse)
    7. FOOT-R: 169 (pulse)
    8. FOOT-F: 169 (pulse)
    9. F/D: 146 (pulse)
    10. DEF: 134 (pulse)
    1. Displayed between 134 and 245 pulse
    2. Mode damper servo motor LH system malfunction
    OK:
    When the driver side mode switch is turned, the actual pulse changes following the target pulse.
    Result
    Result
    		Proceed to
    Target pulse changes but actual pulse does not change
    		A
    Target pulse and actual pulse do not change
    		B
    Actual pulse changes following the target pulse (When troubleshooting according to the DTC)
    		C
    Actual pulse changes following the target pulse (When troubleshooting according to Problem Symptoms Table)
    		D


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

C
Go to step 4

D
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
A


2.CHECK MODE DAMPER SERVO MOTOR

  1. Replace the mode damper servo motor.

    1. for LHD: Click here
    2. for RHD: Click here
HINT:
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one.

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1443/43 is not output.


B
Go to step 3
OK

END (MODE DAMPER SERVO MOTOR WAS DEFECTIVE)

3.CHECK AIR CONDITIONING HARNESS ASSEMBLY

  1. Replace the air conditioning harness assembly with a new or known good one.

    1. for LHD: Click here
    2. for RHD: Click here

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1443/43 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE)

4.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1443/43 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)