Dtc B1449/49 Rear 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 [R], AIR OUTLET SERVO ACTUAL PLS[R])

CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

CHECK REAR MODE DAMPER SERVO MOTOR

CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY

CHECK FOR DTC

DTC B1449/49 Rear Air Outlet Damper Control Servo Motor Circuit


DESCRIPTION

The rear 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 rear mode damper servo motor to the appropriate position, which controls the air outlet modes.

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
B1449/49
The rear mode damper servo motor position does not change even if the air conditioning amplifier assembly operates the rear air outlet damper servo motor.
  1. Rear mode damper servo motor
  2. No. 2 air conditioning harness assembly
  3. Harness or connector
  4. Air conditioning amplifier assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1449/49 Rear Air Outlet Damper Control Servo Motor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING GTS (AIR OUTLET SERVO [R], AIR OUTLET SERVO ACTUAL PLS[R])

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

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Air Outlet Servo Pulse (R)
    		Rear mode damper servo motor target pulse / Min.: 128, Max.: 383
    1. FOOT: 135 (pulse)
    2. B/L: 170 (pulse)
    3. FACE: 211 (pulse)
    1. Displayed between 135 and 211 pulse
    2. Rear mode damper servo motor system malfunction
    Air Outlet Servo Actual Pls(R)
    		Rear mode damper servo motor actual pulse / Min.: 128, Max.: 383
    1. FOOT: 135 (pulse)
    2. B/L: 170 (pulse)
    3. FACE: 211 (pulse)
    1. Displayed between 135 and 211 pulse
    2. Rear mode damper servo motor system malfunction
    OK:
    When the rear 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
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

C
Go to step 5

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


2.CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

  1. Disconnect the K19 No. 2 air conditioning harness assembly connector.

  1. Disconnect the E36 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K19-2 (RBUG) - E36-12 (RBUG)
    		Always
    		Below 1 Ω
    K19-3 (RBUS) - E36-13 (RBUS)
    		Always
    		Below 1 Ω
    K19-4 (RBBU) - E36-14 (RBBU)
    		Always
    		Below 1 Ω
    K19-2 (RBUG) or E36-12 (RBUG) - Body ground
    		Always
    		10 kΩ or higher
    K19-3 (RBUS) or E36-13 (RBUS) - Body ground
    		Always
    		10 kΩ or higher
    K19-4 (RBBU) or E36-14 (RBBU) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK REAR MODE DAMPER SERVO MOTOR

  1. Replace the rear mode damper servo motor (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 B1449/49 is not output.


NG
Go to step 4
OK

END (REAR MODE DAMPER SERVO MOTOR WAS DEFECTIVE)

4.CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY

  1. Replace the No. 2 air conditioning harness assembly with a new or known good one (Click here).

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1449/49 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE)

5.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1449/49 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)