Dtc B1411/11 Room Temperature Sensor 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 INTELLIGENT TESTER (FRONT ROOM TEMPERATURE SENSOR)

INSPECT ROOM TEMPERATURE SENSOR

CHECK HARNESS AND CONNECTOR (FRONT ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)

DTC B1411/11 Room Temperature Sensor Circuit


DESCRIPTION

The front room temperature sensor for the front seat is installed in the instrument panel to detect the room temperature and control the heater and air conditioner "auto" mode. The resistance of the room temperature sensor changes in accordance with the front room temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning amplifier assembly applies voltage (5 V) to the front room temperature sensor and reads voltage changes as the resistance of the front room temperature sensor changes. This sensor also sends the appropriate signals to the air conditioning amplifier assembly.

DTC Code
DTC Detection Condition
Trouble Area
B1411/11
An open or short in the front room temperature sensor circuit.
  1. Front room temperature sensor
  2. Harness or connector between room temperature sensor and air conditioning amplifier 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 B1411/11 Room Temperature Sensor Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (FRONT ROOM TEMPERATURE SENSOR)

  1. Use the Data List to check if the front room temperature sensor is functioning properly.

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Room Temperature Sensor
    		Front room temperature sensor /
    Min.: -6.5°C (20.3°F)
    Max.: 57.25°C (135.05°F)
    		Actual room temperature for front seat displayed
    		Open in the circuit: -6.5°C (20.3°F).
    Short in the circuit: 57.25°C (135.05°F).
    OK:
    The display is as specified in the normal condition.


NG
Go to step 2
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

2.INSPECT ROOM TEMPERATURE SENSOR
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit

  1. Remove the front room temperature sensor (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (+) - 2 (-)
    		10°C (50°F)
    		3.00 to 3.73 kΩ
    15°C (59°F)
    		2.45 to 2.88 kΩ
    20°C (68°F)
    		1.95 to 2.30 kΩ
    25°C (77°F)
    		1.60 to 1.80 kΩ
    30°C (86°F)
    		1.28 to 1.47 kΩ
    35°C (95°F)
    		1.00 to 1.22 kΩ
    40°C (104°F)
    		0.80 to 1.00 kΩ
    45°C (113°F)
    		0.65 to 0.85 kΩ
    50°C (122°F)
    		0.50 to 0.70 kΩ
    55°C (131°F)
    		0.44 to 0.60 kΩ
    60°C (140°F)
    		0.36 to 0.50 kΩ
    NOTICE:
    1. Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
    2. When measuring, the sensor temperature must be the same as the ambient temperature.
    HINT:
    As the temperature increases, the resistance decreases (see the graph).


NG
REPLACE FRONT ROOM TEMPERATURE SENSOR (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (FRONT ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit

  1. w/ Rear Heater

    1. Disconnect the E32 sensor connector.

    2. Disconnect the E35 amplifier connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E32-1 (+) - E35-9 (TR)
      		Always
      		Below 1 Ω
      E32-2 (-) - E35-32 (SG-1)
      E35-9 (TR) - Body ground
      		Always
      		10 kΩ or higher
      E35-32 (SG-1) - Body ground


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit

  1. w/o Rear Heater

    1. Disconnect the E32 sensor connector.

    2. Disconnect the E81 amplifier connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E32-1 (+) - E81-29 (TR)
      		Always
      		Below 1 Ω
      E32-2 (-) - E81-34 (SG-1)
      E81-29 (TR) - Body ground
      		Always
      		10 kΩ or higher
      E81-34 (SG-1) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)